Original Research Reports Differential Effects of Right-Wing Authoritarianism and Social Dominance Orientation on Political Candidate Support: The Moderating Role of Message Framing

Employing a dual process motivational (DPM) model perspective, we found that how political messages are framed influences the differential effects of right-wing authoritarianism (RWA) and social dominance orientation (SDO) on political candidate support in the United States. Study 1 (N = 85) found that RWA and SDO differentially predicted support for right-wing candidates who used cohesion and group status threats to frame same-sex marriage, respectively. Study 2 (N = 89) largely replicated those findings on immigration policy. In Study 3 (N = 128), the hypothesis that RWA and SDO negatively predicted support for left-wing candidates who framed same-sex marriage in terms of individual liberty and social equality, respectively, received partial support. Additional analyses indicated that the effects of RWA on candidate support in these studies were driven by specific theoretically-relevant dimensions of RWA. Together, these results indicate that candidates can enhance their appeal by strategically employing value-based political messages targeting different subsets of their constituency.

campaign questioned Clinton's judgment in authorizing the 2003 invasion of Iraq and literally promised a "change" from the establishment she represented (Cillizza, 2008).
In the present series of studies, we examined whether political candidates can wield information about the values of different subsets of their likely constituency to mobilize support among different subsets of their constituency.
To do so, we integrate literature on framing effects with the dual process motivational (DPM) model of ideological attitudes (Duckitt, 2001;Duckitt & Sibley, 2010a), an approach which suggests that ideological attitudes are organized along two underlying dimensions.

Framing Effects
According to Chong and Druckman (2007a), framing theory assumes that an individual policy can be construed in multiple ways, and that these various policy interpretations will emphasize different values or considerations that can form or shape voters' beliefs about the policy.Frames are typically utilized by political elites to promote "particular definitions and interpretations of political issues" by making certain values or considerations salient to voters (Shah, Watts, Domke, & Fan, 2002, p. 343).Thus, a framing effect occurs when "in the course of describing an issue or event, a speaker's emphasis on a subset of potentially relevant considerations causes individuals to focus on these considerations when constructing their opinions" (Druckman & Nelson, 2003, p. 730).
Most research has examined framing effects within the context of intergroup competition-specifically, when opposing sides of a political issue compete to effectively frame the issue (Chong & Druckman, 2007a;Chong & Druckman, 2007b;Jerit, 2009).Examples include "freedom" vs. "law and order" frames for minority rights (Chong & Druckman, 2007b;Sniderman & Theriault, 2004), "cruel and inhumane" vs. "tough love" frames for welfare reform (Brewer, 2001), and "equality" vs. "morality" frames for same-sex marriage or civil unions (Brewer, 2002).Because most research examines frames used by opposing sides of a policy debate, researchers have controlled for perceivers' prior attitudes to determine framing effects (Chong & Druckman, 2007a;2007b).In the context of withinparty electoral contests, however, voters' specific prior attitudes or values may be an important consideration for examining framing effects.For example, in the only study we are aware of to examine framing effects in a withinparty context, Barker (2005) found that Republican primary voters in the 2000 election were more likely to vote for John McCain when an "individualism" frame of school voucher programs was attributed to him than when an "egalitarianism" frame was attributed to him.
Of course, Barker intentionally employed one frame consistent with Republican values (individualism) and one frame inconsistent with Republican values (egalitarianism), rather than two frames consistent with Republican values.What we propose is that within a political party, even when candidates adopt the same issue position (e.g., opposing same-sex marriage), they can employ different frames of that issue position with different subsets of their voters' values in mind (Chong, 1996).Thus, for example, while one Republican candidate may increase his or her support among a certain subset of voters by framing an issue in terms of one particular conservative value, another Republican candidate can increase his or her support among another subset of voters by emphasizing a different conservative value on that same issue.The DPM model is a social psychological framework that provides such a distinction between related but distinct ideological attitude dimensions.We review this model next and then integrate its predictions with the framing literature to introduce hypotheses for how political candidates can differentially frame an issue to enhance support among different subsets of their constituency.

Applying the DPM Model to Framing Effects
Although earlier scholars suggested that ideology was best conceived unidimensionally (e.g., Adorno, Frenkel-Brunswik, Levinson, & Sanford, 1950;Wilson, 1973), it has become increasingly clear over the last several decades that (at least) two dimensions underlie ideological attitudes.Duckitt (2001) developed the DPM model based on evidence suggesting two dimensions of ideological attitudes: one characterized by social conservatism and traditionalism vs. individual freedom and autonomy, and another characterized by economic conservatism, group dominance and power vs. egalitarianism.
RWA and SDO have different social and psychological bases.RWA derives from a belief that the world is a dangerous place, full of threats to both the individual and the group.Such a worldview stems from a predisposition towards social conformity and the experience of threat or danger in the environment.In contrast, SDO derives from a belief that the world is a competitive jungle that creates a constant intergroup struggle for dominance and superiority.This worldview stems from a predisposition towards psychological tough-mindedness and the experience of competition in the environment (Duckitt, 2001;Duckitt, Wagner, du Plessis, & Birum, 2002).
According to the DPM model, RWA more strongly predicts attitudes related to social cohesion concerns whereas SDO more strongly predicts attitudes related to intergroup dominance concerns.This differential prediction hypothesis has been supported by research examining intergroup (Duckitt & Sibley, 2007) as well as political attitudes: generally speaking, RWA more strongly predicts attitudes on socio-cultural political issues whereas SDO more strongly predicts attitudes on economic and status hierarchy-related issues (Altemeyer, 1998;Van Hiel, Pandelaere, & Duriez, 2004).For example, Crawford, Jussim, Cain, and Cohen (2013) found that RWA more strongly predicted people's evaluations of a newspaper article about same-sex relationships, whereas SDO more strongly predicted people's evaluations of an article about affirmative action policy.
While within-party opponents may agree on issue positions in substance, they may differentiate themselves in style by using language or themes that make certain value considerations more salient than others.From a DPM model perspective, we hypothesize that when people are presented with candidates who take the same issue position but make different values salient through their arguments, support for the candidate who frames the issue by making social cohesion considerations salient will be more strongly predicted by RWA than SDO, whereas support for the candidate who frames the issue by making group status considerations salient will be more strongly predicted by SDO than RWA.

The Current Research
In three studies, we tested the differential prediction hypothesis as applied to political candidate support.In Study 1, we used a within-participants design to examine whether RWA and SDO differentially predict support for Republican primary candidates who frame same-sex marriage by making either social cohesion or group status threats salient, respectively.In Study 2, we extended Study 1's findings to immigration policy using a betweenparticipants design.Finally, in Study 3, we looked to generalize support for our hypotheses by examining in a within-participants design whether support for Democratic primary candidates who employed pro-same-sex marriage frames emphasizing individual liberty and social equality would be differentially (and in this case, negatively) predicted by RWA and SDO, respectively.

Study 1
A frame generally does not occur within a vacuum; rather, voters often face competing frames-that is, two or more frames that offer opposing considerations of a particular issue (e.g., Social Security privatization; Jerit, 2009) from competing parties or interest groups (Chong & Druckman, 2007a;Jerit, 2009;Sniderman & Theriault, 2004).
However, as previously noted, competing frames in extant studies present opposing sides of an issue.For example, the "morality" frame used by Brewer (2002) was an anti-same sex marriage frame, while the "equality" frame was a pro-same-sex marriage frame.Our primary interest however is whether the effectiveness of distinct frames of the same issue position depends on the perceiver's levels of RWA and SDO.
In Study 1 we therefore examined the effectiveness of cohesion and status threat frames on support for two rightwing candidates engaged in a primary debate over same-sex marriage.While both candidates opposed legalizing same-sex marriage, they provided different reasons for their opposition, thereby making different values salient to the audience.Drawing on the DPM model, we predicted that RWA would more strongly predict support for the candidate who used the cohesion threat frame than would SDO, whereas SDO would more strongly predict support for the candidate who used the status threat frame than would RWA.In addition, because the issue of same-sex marriage involves conformity or non-conformity to normative definitions of sexuality and family, we hypothesized that the Traditionalism dimension of RWA would most strongly predict support for the candidate who used the cohesion threat frame.i
Samples obtained from MTurk possess greater demographic diversity and representativeness than student samples (Buhrmester, Kwang, & Gosling, 2011), and well-established findings in social psychology and political science have been replicated in MTurk samples (Berinsky, Huber, & Lenz, 2012;Horton, Rand, & Zeckhauser, 2011).Interested individuals selected a link to the online survey and were compensated with 50 cents for their participation.As an attention check, following their evaluations of both candidates, participants indicated whether each candidate supported or opposed legalizing same-sex marriage.Fifteen participants failed to correctly note that both candidates opposed legalizing same-sex marriage and were removed, leaving 85 participants (79% White; 53% female; M age = 35 years; 60% liberal, 20% conservative; 60% Democratic, 21% Republican) in the final analysis.

Materials and Procedure
RWA and SDO -Participants first completed the RWA and SDO scales.We used an 18-item version of Duckitt et al.'s (2010) 36-item RWA scale, selecting six items from each of the three dimensions (i.e., Authoritarianism, Conservatism, and Traditionalism).However, because one item on the Traditionalism dimension assessed attitudes towards gays and lesbians ("Everyone should have their own lifestyle, religious beliefs, and sexual preferences, even if it makes them different from everyone else"), we excluded this item and computed a 17-item RWA scale for Study 1. Participants also completed a 10-item SDO scale (Sidanius & Pratto, 1999).All scales were balanced for protrait and contrait items.Scale presentation order and scale item order were randomized across participants.
Items were measured on 7-point scales (1 = Strongly Disagree; 7 = Strongly Agree), and average scores were computed for RWA, its three dimensions, and SDO.
ii Appendices A and B present the items for the RWA and SDO scales used in these studies.
Candidate arguments and candidate support measures -Participants then read the transcript of an ostensible debate over same-sex marriage between two Republican Party primary candidates.The Cohesion Threat candidate argued that legalizing same-sex marriage would erode the American family, harm children, and destroy the moral fabric of society.This frame is broadly consistent with the "morality" frame that dominates conservative activists' and newspaper editorialists' framing for their opposition to same-sex marriage (Tadlock, Gordon, & Popp, 2007).
The Status Threat candidate argued that legalizing same-sex marriage would not only be fiscally irresponsible, but would give benefits to same-sex couples at the expense of heterosexual couples (see Appendix C). iii The order of these arguments was counterbalanced.Regardless of argument order, the first candidate (labeled "Republican A") always began with the statement, "A constitutional amendment is needed to protect the traditional definition of marriage as the union of one man and one woman", and ended with the statement, "Congress needs to take action on instituting a Constitutional amendment to defend marriage now".The second candidate (labeled "Republican B") always began with the statement, "I also agree that Congress needs to take immediate action and adopt a Constitutional amendment to protect the definition of marriage, but for different reasons than those offered by my fellow candidate".This language conveyed that while both candidates opposed same-sex marriage, their reasons differed.

Preliminary Analyses
Table 1 reports the descriptive statistics for RWA and its three dimensions, SDO, and measures of candidate support.All measures were reliable.RWA and its three dimensions were positively correlated with SDO, and the two candidate support measures were positively correlated with one another.Cohesion Threat candidate support was most strongly correlated with the Traditionalism dimension of RWA.Status Threat candidate support was most strongly correlated with SDO.

Primary Analyses
We first conducted two multiple regression analyses, one regressing Cohesion Threat candidate support on RWA and SDO and another regressing Status Threat candidate support on RWA and SDO.Consistent with the differential prediction hypothesis, RWA predicted support for the Cohesion Threat candidate, b = .55,SE = .17,β = .37,p < .001,but SDO did not, b = .21,SE = .14,β = .17,ns (model R 2 = .22,p < .001).Moreover, SDO predicted support for the Status Threat candidate, b = .47,SE = .11,β = .47,p < .001,but RWA did not, b = .17,SE = .12,β = .15,ns (model R 2 = .30,p < .001).To assess RWA's and SDO's interactive effects with candidate argument, we created a difference score to indicate greater support for the Cohesion over Status Threat candidate, and regressed this difference score on RWA and SDO (see Judd, Kenny, & McClelland, 2001).This analysis revealed We  (Aiken & West, 1991).Neither interaction was significant in the analysis of Cohesion Threat candidate support (bs < .30,ps > .146).In the analysis of Status Threat candidate support, whereas the Traditionalism × Order interaction was not significant (b = -.18,SE = .17,β = -.17,p = .293),the SDO × Order interaction was significant (b = .51,SE = .21,β = .40,p < .05).To probe this significant interaction, we used Hayes' ( 2013) PROCESS macro (model 1), which estimates simple slopes based on the entire sample, a procedure preferable to conducting separate regression analyses at each level of the dichotomous variable (in this case, Order).We used PROCESS to calculate all simple slope analyses reported in this paper.For this SDO × Order interaction, simple slope analyses (which included Traditionalism as a covariate) indicated that SDO significantly predicted Status Threat candidate support when the Status Threat frame was presented first, b = .67,SE = .12,p < .001,but not when the Cohesion Threat frame was presented first, b = .16,SE = .17,p = .332.

Discussion
When presented with two right-wing candidates who opposed same-sex marriage for different reasons, support for the candidate who framed same-sex marriage as a threat to social cohesion and moral values was predicted by RWA but not SDO, while support for the candidate who framed same-sex marriage as a threat to the status of heterosexuals was predicted by SDO but not RWA.Moreover, RWA was a stronger predictor of cohesion than status threat candidate support, whereas SDO was a stronger predictor of status than cohesion threat candidate support.These effects of RWA on support for a candidate who used moral arguments against same-sex marriage were driven primarily by the Traditionalism dimension of RWA, which assesses adherence to traditional values and morals (Duckitt et al., 2010).Interestingly, the effects of SDO on support for the Status Threat candidate were strongest when the status threat frame was presented before the cohesion threat frame.One possible reason for this effect is that because the cohesion threat frame is the more dominant frame in conservative political discourse on same-sex marriage (Brewer, 2002;Tadlock et al., 2007), its greater accessibility may have overridden the effectiveness of the subsequent status frame (for a similar argument, see Chong & Druckman, 2007c).Together, then, these findings provide initial support for our hypotheses that right-wing candidates can differentially use cohesion and status threat frames to appeal to people high in RWA and SDO, respectively.

Study 2
In Study 2, our objective was to conceptually replicate Study 1's findings on a different political issue-namely, immigration policy.Immigrants can pose a cohesion threat as they bring new customs to their host country and may not readily adopt their host country's customs (Paxton & Mughan, 2006).However, immigrants can also pose a status threat to the extent that they may compete for jobs and other resources (Esses, Jackson, & Armstrong, 1998).Not surprisingly, then, both RWA and SDO predict negative attitudes towards immigrants (Hodson & Costello, 2007), and several recent studies in a variety of countries have shown that RWA and SDO differentially predict anti-immigrant attitudes when cohesion and group status threats are salient, respectively (Crawford & Pilanski, in press;Duckitt & Sibley, 2010b;Thomsen, Green, & Sidanius, 2008).
Thus, it seems likely that RWA would more strongly predict support for a right-wing candidate who frames strict immigration policies in terms of cohesion threats, whereas SDO would more strongly predict support for a rightwing candidate who frames such policies in terms of group status threats.To test these hypotheses, participants read the immigration policy statement of a Republican Senator, ostensibly drawn from his campaign's website.
In a between-participants design, we varied whether the Senator's immigration policy made cohesion (i.e., requiring immigrants to learn English, the main language in the U.S.) or status (i.e., making sure available jobs went to native-born Americans before immigrants) threats salient.Additionally, because the anti-immigrant policy proposed by the Cohesion Threat candidate is harsh and restrictive, we hypothesized that the Authoritarianism dimension of RWA, which is most predictive of punitive anti-immigrant attitudes (Duckitt et al., 2010), would most strongly predict support for that candidate.

Method Participants
Using recruitment methods identical to those used in Study 1, we recruited 99 current U.S. residents through MTurk.As an attention check, following their evaluations of the target, participants indicated whether the candidate supported stronger or more lenient immigration policies.Four participants failed to correctly note the candidate's support for stronger immigration policies and were removed.Moreover, because we expected U.S. Latinos to react differently compared to non-Latinos to statements regarding restrictive immigration policies, six additional participants who self-identified as Hispanic or Latino/a were also removed, leaving 89 participants (82% White; 52% female; M age = 36 years; 51% liberal, 25% conservative; 60% Democratic, 21% Republican) in the final analysis.

Materials and Procedure
Participants first completed the 18-item RWA v and 10-item SDO scales used in Study 1, and were then randomly assigned to either the Cohesion Threat or Status Threat condition.All participants read a description of the Republican "Senator A", ostensibly drawn from his campaign's website.After describing his early personal life and military and civic service, the Senator offered an immigration policy statement.In the Cohesion Threat condition, the statement read, "I have always supported laws requiring that immigrants to the United States learn to speak English.Too often we see immigrants come here and refuse to learn our language, and so I strongly support le- Obama's approach to global leadership, thanked voters for their support, and encouraged them to vote for him in the upcoming election.Participants then completed the 4-item candidate support measure used in Study 1, and then the attention check item.We then assessed ideological self-placement, party affiliation, political knowledge, and demographic information.

Preliminary Analyses
Table 2 reports the descriptive statistics for RWA and its three dimensions, SDO, and candidate support.All measures were reliable.RWA and SDO were correlated with one another and with candidate support, but RWA and its three dimensions were more strongly correlated with candidate support than was SDO.

Primary Analyses
To test our hypotheses in this between-participants design, we conducted a moderated multiple regression analysis in which RWA, SDO, and Threat (0 = Cohesion, 1 = Status) were entered in Step 1, and the RWA × Threat and SDO × Threat interactions were entered in Step 2. Although we tested these interactive effects, the primary tests of the differential prediction hypotheses involve comparing the effects of RWA and SDO on support for each individual candidate, as in Study 1.
Table 3 shows that the RWA × Threat interaction was significant (p = .009),and the SDO × Threat interaction was marginally significant (p = .089).Simple slope analyses indicated that RWA predicted support for the Cohesion   We therefore subsequently performed two versions of the moderated multiple regression analysis described above, one replacing the full RWA scale with Authoritarianism, and another replacing the full scale with Traditionalism.Interestingly, the significant RWA × Threat and marginally significant SDO × Threat interactions observed in the full RWA scale analysis above were not observed in the Traditionalism dimensional analysis (for the RWA × Threat interaction, p = .095;for the SDO × Threat interaction, p = .224).Instead, the effects on Cohesion Threat candidate support observed in the full RWA scale analysis were clearly driven by the Authoritarianism dimension, as the expected Authoritarianism × Threat (p = .009)and SDO × Threat (p = .054)interactions were observed (see Table 4).The conclusions were identical to those from the full scale analysis: simple slope analyses indicated that Authoritarianism predicted support for the Cohesion Threat candidate, b = 1.08,SE = .17,p < .001,but SDO did not, b = .07,SE = .16,p = .652,in line with the differential prediction hypothesis.However, inconsistent with the differential prediction hypothesis, both Authoritarianism (b = .51,SE = .14,p < .001)and SDO (b = .54,SE = .18,p = .003)predicted support for the Status Threat candidate.Looked at another way, Authoritarianism more strongly predicted Cohesion than Status Threat candidate support, whereas SDO only predicted support for the Status Threat candidate.

Discussion
Using a different political issue (i.e., immigration policy) and research design (i.e., between-participants), we largely replicated Study 1's finding that RWA and SDO differentially predict support for right-wing candidates who frame public policy using cohesion and status threats, respectively.Specifically, RWA more strongly predicted support for a candidate whose immigration policy made cohesion threats salient (immigrants learning the host country's language) than did SDO.However, both RWA and SDO significantly predicted support for a candidate whose policy made group status threats salient (immigrants competing for jobs with native-born individuals).This finding is inconsistent with the differential prediction hypothesis, but consistent with other extant studies showing robust effects of RWA across conditions (Cohrs & Asbrock, 2009;Thomsen et al., 2008).The present finding may be attributable to the fact that RWA in general, and Authoritarianism in particular, is a powerful determinant of antiimmigrant attitudes (Duckitt et al., 2010).Further, given their heightened threat sensitivity, people high in RWA may have perceived competition with immigrants for jobs as threatening (Lavine, Lodge, & Freitas, 2005).That said, RWA did more strongly predict support for the Cohesion Threat than Status Threat candidate, consistent with DPM model predictions.

Study 3
Across two different political issues, Studies 1 and 2 demonstrated that right-wing candidates can differentially enhance their support by framing the same issue position with two different kinds of conservative voters in mind-those concerned with social cohesion (i.e., people high in RWA) and those concerned with group status (i.e., people high in SDO).But can left-wing candidates also strategically frame a single issue position in different ways to enhance their support among different kinds of liberal voters?
According to Hunsberger and Altemeyer (2006, pp. 100 and 113), people low in RWA hold the opposite motives of those high in RWA: they support non-normative individuals or groups, question authority and other coercive forces, oppose restrictions on individual liberty, and support liberal or progressive social policies.Likewise, people low in SDO are motivated to attenuate rather than maintain or enhance intergroup dominance and status differences (Sidanius & Pratto, 1999).Based on these assumptions, we presumed that people low in RWA would be most concerned with preserving individual liberty, autonomy, and freedom of choice, whereas people low in SDO would be most concerned with assuring social equality and egalitarianism.We therefore constructed a primary debate between two Democratic candidates who framed same-sex marriage support in terms of individual liberty (ensuring that gays and lesbians are free to marry the partner of their choice) or social equality (ensuring that gays and lesbians are treated equally under the law).We hypothesized that RWA would be a stronger negative predictor of Liberty candidate support than would SDO, whereas SDO would be a stronger negative predictor of Equality candidate support than would RWA.Further, because Traditionalism was the strongest predictor of support for the right-wing candidate who framed same-sex marriage as a cohesion threat in Study 1, we hypothesized that Traditionalism would be the RWA dimension that most strongly (negatively) predicted support for the left-wing candidate who framed same-sex marriage support in terms of individual liberty.Perceived protection of liberty and equality -Paired samples t-tests indicated that participants recognized the distinction between the two candidates: they believed the Liberty candidate (M = 6.02,SD = 1.08) was a stronger protector of individual liberty than the Equality candidate (M = 5.13, SD = 1.26), t(125) = 5.96, p < .001,and that the Equality candidate (M = 6.04,SD = 1.02) was a stronger protector of social equality than the Liberty candidate (M = 5.04, SD = 1.26), t(124) = 6.75, p < .001.Participants also accurately perceived the reasons behind each candidates' support for same-sex marriage: they perceived the Liberty candidate as a stronger protector of individual liberty than social equality, t(125) = 7.02, p < .001,and the Equality candidate as a stronger protector of social equality than individual liberty, t(124) = 7.05, p < .001.
To assess RWA's and SDO's interactive effects with candidate argument, we created a difference score to indicate greater support for the Liberty over Equality candidate, and regressed this difference score on RWA and SDO (Judd et al., 2001).This analysis revealed that low scores on the SDO scale more strongly predicted Equality than Liberty candidate support, b = .48,SE = .14,β = .33,p = .001.Although there was a tendency for low scores on the RWA scale to more strongly predict support for the Liberty than Equality candidate, this difference was not significant, b = -.15,SE = .18,β = -.08,p = .416(model R 2 = .10,p < .01).
We therefore subsequently regressed the two candidate support measures on Traditionalism and SDO.Consistent Finally, moderated multiple regression analyses examining order effects determined that unlike Study 1, argument order did not significantly moderate these relationships, all ps > .058. vi

Discussion
While Studies 1 and 2 demonstrated that RWA and SDO have differential effects on right-wing candidate support, Study 3 extended those findings to show that these ideological attitude dimensions also exert differential effects on support for left-wing candidates who make different values salient on a single political issue.Specifically, support for a left-wing candidate who framed same-sex marriage in terms of preserving individual liberty and freedom was most strongly and negatively predicted by the Traditionalism dimension of RWA, which (on the low end of the scale) assesses valuing making one's own choices over conformity to traditional morals and values (Duckitt et al., 2010).On the other hand, support for a candidate who framed the same issue position in terms of social equality was most strongly and negatively predicted by SDO.The interactive effects suggest that people low in SDO clearly preferred the Equality candidate; however, while people high in RWA show a slight preference for the Liberty candidate, they supported both candidates roughly equally.

General Discussion
Framing effects research has examined how opposing sides of a policy debate use frames to influence policy attitudes (Chong & Druckman, 2007a, 2007b;Sniderman & Theriault, 2004).Employing a dual process motivational (DPM) model perspective (Duckitt, 2001;Duckitt & Sibley, 2010a), we found in three studies that candidates on the same side of a policy debate can enhance support for their candidacy by using different frames to mobilize support among different subsets of their constituency.Specifically, candidates can differentially influence support for their candidacies by offering messages that make the values and motives of people high (or low) in right-wing authoritarianism (RWA) and social dominance orientation (SDO) salient.
Together, Studies 1 and 2 showed that when right-wing candidates use messages that raise threats to social cohesion, RWA is a stronger predictor of candidate support than SDO, but when right-wing candidates raise threats to group status, SDO is generally a stronger predictor of candidate support than RWA.These effects were demonstrated across two separate political issues (i.e., same-sex marriage and immigration policy) and using both within-and between-participants research designs.Moreover, these RWA effects were driven primarily by theoretically relevant sub-dimensions (i.e., Traditionalism for same-sex marriage and Authoritarianism for immigration policy), as derived from Duckitt et al.'s (2010) recent reconceptualization of the RWA construct.The only finding somewhat inconsistent with the differential prediction hypothesis is that RWA and SDO were equally predictive of Status Threat candidate support in Study 2. This finding is, however, consistent with other extant findings showing that while RWA has its strongest effects on anti-immigrant attitudes under conditions of threat, it also predicts anti-immigrant attitudes under other conditions (Cohrs & Asbrock, 2009;Thomsen et al., 2008)

Implications for Framing Effects
An impressive body of evidence underscores how message frames shape policy attitudes (Chong & Druckman, 2007b;Jerit, 2009;see Chong & Druckman 2007a for a review).However, framing effects in cases in which the issue position is held constant (e.g., within-party electoral contests) have been largely ignored.In the U.S., for example, these are increasingly important contexts in which to understand framing effects, as more states have moved their primaries to earlier dates in the election season (Tolbert, Redlawsk, & Bowen, 2009).This "frontloading effect" expands the number of relevant primary contests and likely contributes to more heated primary debate.
For candidates who might not differ from their opponents in the substance of policy position, advantages gained through rhetorical style and value considerations may influence the outcome of a primary election.With an awareness of the values of different subsets of their constituency (to which even political novices have access; see Footnote iii), campaigns can tailor their messages to increase support among particular voters.Given that U.S. President Barack Obama's re-election campaign website allowed visitors to select the campaign's message tailored towards their own sociodemographic group (e.g., LGBT Americans; Young Americans), campaigns are likely already aware of this strategy, at least at the social demographics level.Of course, the present studies focused on peoples' value considerations, which can provide a more nuanced, and perhaps more useful, approach to targeted voter appeal.Through in-person and online voter outreach and sophisticated voter database management, campaigns could potentially ascertain, maintain, and utilize information on voters' values to implement targeted campaign messaging.Future research could explore these possibilities, as well as how and when voters rely on these sets of values using dynamic process tracing techniques (e.g., Lau & Redlawsk, 2006).
Recently, framing researchers have suggested that scholars examine competing frames by which respondents are exposed to multiple frames in a within-participants design, as opposed to being exposed to one of several frames in a between-participants design (Chong & Druckman, 2007a, 2007b;Jerit, 2009 affiliation, as no bivariate correlation between party affiliation and these ideological attitude dimensions exceeded r = .54(average r = .35).Thus, it was appropriate and important to consider all participants for these analyses, regardless of party affiliation or ideological orientation.
One clear limitation of these studies is that they were conducted entirely within the context of the U.S. political system.The results should therefore not apply to all political systems.Future research should therefore explore how framing influences the differential effects of RWA and SDO in within-party electoral contests in other political systems.One potentially interesting line of research could examine whether these differential within-party framing effects depend on the strength of the country's ideological contrast.For example, we should expect to replicate these findings in countries like the United States with relatively weak ideological contrast and thus weaker correlations between RWA and SDO (e.g., Canada, South Africa; Duckitt, 2001;Roccato & Ricolfi, 2005).However, differential framing of within-party political messages may be less effective in countries with strong ideological contrasts and therefore stronger RWA-SDO correlations (e.g., Germany, Australia; Duckitt, 2001;Roccato & Ricolfi, 2005).
Finally, these studies used the DPM model as a vehicle for understanding the dynamics of political message framing in within-party political contests.It stands to reason that similar processes can also be captured using other frameworks in political or moral psychology, such as moral foundations theory, which posits, for example, that the foundations of ingroup, authority, and purity are related but distinct pillars of conservatives' morality (Graham, Haidt, & Nosek, 2009;Weber & Federico, 2013).

Conclusion
While rational self-interest might drive some electoral behavior, psychologists and political scientists have amply demonstrated the influence of emotions, values, and ideology in voting behavior and candidate support (Jost, 2006;Marcus, Neuman, & MacKuen, 2000;Shah, Domke, & Wackman, 1996).The present studies shed new light on how ideological motives for social cohesion (vs.individual liberty) and group dominance (vs.social equality) as captured by RWA and SDO, respectively, can influence candidate support.While we certainly imagine that opportunistic political campaigns could cynically exploit such information, we hope we are not too naïve in suggesting that elected officials can use this information to encourage greater democratic participation and engagement among their respective constituencies.

Notes
i) In this paper, we explored the multidimensionality of RWA, but not SDO.Previous investigators have examined the multidimensionality of SDO using balanced SDO scales (e.g., Ho et al., 2012;Kugler, Cooper, & Nosek, 2010), which we did not include in these studies.Future research could use the balanced multidimensional scales developed by these authors to provide an optimal test of the multidimensional effects of SDO on candidate support.
ii) In all three studies, scales were computed only for participants who completed every scale item.Subsequently, casewise deletion was used for each separate analysis, which explains variation of Ns within each study.To examine whether extreme scores in our three samples unduly influenced our conclusions, we calculated Mahalanobis and Cook's distances to identify potential multivariate outliers in the regression analyses reported in these studies (Tabachnick & Fidell, 2013).There were no outliers identified in Studies 1 or 2. In Study 3, only one participant exceeded the critical χ 2 value of 13.816 (p < .001,df = 2); that said, this participant's responses did not significantly exert influence, as measured by Cook's distance (D < 1).As a precaution, we removed this participant and recalculated the regression analyses.Because removal of this participant did not alter any of our conclusions, we retained this participant in the analyses reported in the main text of Study 3.
iii) In a pilot study, 92 undergraduates were randomly assigned to read a brief description of either people high in RWA or people high in SDO, and chose which of the two frames they believed would be most appealing to that target audience.A chi square test for independence confirmed that people chose the Cohesion Threat frame over the Status Threat frame for people high in RWA and the Status Threat frame over the Cohesion Threat frame for people high in SDO, χ 2 (1, n = 72) = 31.61,p < .001.iv) We did not observe enough variation on political knowledge to examine its moderating effects: in each study, at least 92% of participants answered four of the six items correctly (Study 1: M = 5.59, SD = 0.78; Study 2: M = 5.48, SD = 1.06;Study 3: M = 5.33, SD = 0.95).
v) No items on the RWA and SDO scales were related to attitudes towards immigrants or immigration, so the full scales were used.
vi) Regarding this marginally significant Traditionalism × Order interaction, simple slope analyses (including SDO as a covariate) indicated that as expected, Traditionalism did not predict Equality candidate support when the argument tailored towards people low in Traditionalism (i.e., the Liberty argument) was presented last (p = .999),but it was an unexpected negative predictor of Equality candidate support when the Equality argument was presented last (p = .005).Looked at another way, whereas for people high in Traditionalism (one SD above the mean) support for the Equality candidate was the same independent of argument order (p = .902),people low in Traditionalism (one SD below the mean) tended to more strongly support the Equality candidate when the Equality argument was presented last than when it was presented first (p = .177).These asymmetrical order effects might perhaps have something to do with both the general strength (Rutgers Eagleton Center for Public Interest Polling, 2011) and accessibility (Tadlock et al., 2007) of the Equality argument.

Equality Frame (Study 3)
For me, it is a real problem when the law treats one group of Americans as inferior to another group of Americans.Federal and state laws that deny gays and lesbians the right to marry legitimize and foster inequality between heterosexual Americans and gay and lesbian Americans.Marriage inequality has real consequences, too-it denies crucial benefits and privileges to gay and lesbian couples that heterosexual couples receive only because of their sexual orientation.Legalizing same-sex marriage will guarantee that that we preserve the fundamental American value of equality for all, regardless of sexual orientation.

Following
these two arguments, candidate support was measured with a 4-item scale for each candidate.Participants indicated the likelihood that they would a) vote for the candidate, b) wear a campaign button with the candidate's name and image, c) attend a rally in support of the candidate, and d) encourage family and friends to vote for the candidate (1 = Very Unlikely; 7 = Very Likely).Participants completed these items first for Republican A and then Republican B, all on the same page.Average candidate support scales were computed for each candidate.On a separate page, participants then completed the attention check (i.e., whether each candidate supported or opposed legalizing same-sex marriage).Political affiliation, political knowledge, and demographics -We then assessed ideological self-placement (1 = Extremely Liberal; 7 = Extremely Conservative) and party affiliation (1 = Strong Democrat; 7 = Strong Republican).Participants then indicated whether Democrats or Republicans support or oppose six specific social policies (e.g., same-sex marriage, affirmative action programs).Correct and incorrect answers were coded as 1 and 0 respectively, and correct scores were summed to form a political knowledge measure.ivLastly, participants provided demographic information such as age, gender, and race/ethnicity.
gislation that includes a requirement to learn English."This statement was a modified version of a statement made by Senator John McCain (R-Arizona) during a Republican Party primary debate in December 2007.In the Status Threat condition, the statement read, "I have always supported strong immigration policies.Too often American jobs go to foreign laborers.I will carefully scrutinize proposals that affect our nation's immigration policies and will work to ensure that Americans are first in line for available jobs."This statement was a modified version of a statement that appears on the website of Senator Pat Roberts (R-Kansas).Each candidate then criticized President Threat candidate, b = 1.23,SE = .17,p < .001,but SDO did not, b = .03,SE = .16,p = .870,in line with the differential prediction hypothesis.However, inconsistent with the differential prediction hypothesis, both RWA (b = .62,SE = .15,p < .001)and SDO (b = .44,SE = .18,p = .019)predicted support for the Status Threat candidate.Looked at another way, RWA more strongly predicted Cohesion than Status Threat candidate support, whereas SDO only predicted support for the Status Threat candidate.
Note.Ns ranged from 79 to 84 for the correlational analyses.

Table 3
Study 2: Moderated multiple regression analysis for the full RWA scale(N = 84)
(Duckitt & Sibley, 2010ae strongly predict support for the Cohesion Threat than Status Threat candidate in Study 2, consistent with DPM model predictions(Duckitt & Sibley, 2010a; see alsoCrawford & Pilanski, in press).Study 3 demonstrated that right-wing candidates are not the only ones who can capitalize on these differential framing effects, as SDO but not RWA negatively predicted support for a left-wing candidate who framed samesex marriage support in terms of assuring social equality.The findings for a left-wing candidate who framed samesex marriage in terms of individual liberty were more nuanced: the differential prediction hypothesis was only supported on the Traditionalism dimension, which more strongly and negatively predicted support for the Liberty candidate than did SDO.Whereas people low in SDO clearly preferred the Equality candidate, people low in RWA showed a slight preference for the Liberty candidate, but ultimately supported both candidates equally.The strength of the Equality candidates' argument in Study 3 may reflect the fact that "marriage equality" has become the dominant frame in left-wing discourse on same-sex marriage.Recent polling research also suggests that this is a powerful frame: in a Rutgers-Eagleton poll of New Jersey voters, support for marriage rights for gays and lesbians jumped from 51% when it was framed as "gay marriage" to 62% when it was framed as "marriage equality" (Rutgers Eagleton Center for Public Interest Polling, 2011).