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Do Contact and Empathy Mitigate Bias Against Gay and Lesbian People Among Heterosexual First-Year Medical Students? A Report From the Medical Student CHANGE Study

Burke, Sara E., MPhil; Dovidio, John F., PhD; Przedworski, Julia M.; Hardeman, Rachel R., PhD, MPH; Perry, Sylvia P., PhD; Phelan, Sean M., PhD, MPH; Nelson, David B., PhD; Burgess, Diana J., PhD; Yeazel, Mark W., MD, MPH; van Ryn, Michelle, PhD, MPH

doi: 10.1097/ACM.0000000000000661
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Purpose A recent Institute of Medicine report concluded that lesbian and gay individuals face discrimination from health care providers and called for research on provider attitudes. Medical school is a critical juncture for improving future providers’ treatment of sexual minorities. This study examined both explicit bias and implicit bias against lesbian women and gay men among first-year medical students, focusing on two predictors of such bias, contact and empathy.

Method This study included the 4,441 heterosexual first-year medical students who participated in the baseline survey of the Medical Student Cognitive Habits and Growth Evaluation Study, which employed a stratified random sample of 49 U.S. medical schools in fall 2010. The researchers measured explicit attitudes toward gay and lesbian people using feeling thermometer self-assessments, implicit attitudes using the Implicit Association Test, amount and favorability of contact using self-report items, and empathy using subscales of the Interpersonal Reactivity Index.

Results Nearly half (45.79%; 956/2,088) of respondents with complete data on both bias measures expressed at least some explicit bias, and most (81.51%; 1,702/2,088) exhibited at least some implicit bias against gay and lesbian individuals. Both amount and favorability of contact predicted positive implicit and explicit attitudes. Both cognitive and emotional empathy predicted positive explicit attitudes, but not implicit attitudes.

Conclusions The prevalence of negative attitudes presents an important challenge for medical education, highlighting the need for more research on possible causes of bias. Findings on contact and empathy point to possible curriculum-based interventions aimed at ensuring high-quality care for sexual minorities.

S.E. Burke is a doctoral candidate, Department of Psychology, Yale University, New Haven, Connecticut.

J.F. Dovidio is Carl Iver Hovland Professor, Department of Psychology, Yale School of Public Health, and Center for Interdisciplinary Research on AIDS, Yale University, New Haven, Connecticut.

J.M. Przedworski is a doctoral student and National Cancer Institute predoctoral fellow, Division of Health Policy and Management, University of Minnesota, Minneapolis, Minnesota.

R.R. Hardeman is research associate, University of Minnesota Department of Medicine, and associated health postdoctoral fellow, Center for Chronic Disease Outcomes Research, Minneapolis Veterans Affairs Medical Center, Minneapolis, Minnesota.

S.P. Perry is assistant professor, Department of Psychological Science, University of Vermont, Burlington, Vermont.

S.M. Phelan is assistant professor, Division of Health Care Policy and Research, Mayo Clinic, Rochester, Minnesota.

D.B. Nelson is core investigator and senior statistician, Center for Chronic Disease Outcomes Research, Minneapolis Veterans Affairs Medical Center, and associate professor, Department of Medicine, University of Minnesota, Minneapolis, Minnesota.

D.J. Burgess is core investigator, Center for Chronic Disease Outcomes Research, Minneapolis Veterans Affairs Medical Center, and associate professor, Department of Medicine, University of Minnesota, Minneapolis, Minnesota.

M.W. Yeazel is associate professor, Department of Family Medicine and Community Health, University of Minnesota, Minneapolis, Minnesota.

M. van Ryn is professor, Health Services Research, Mayo Clinic College of Medicine, and director, Research Program on Equity and Quality of Patient–Provider Encounters, Division of Health Care Policy and Research, Mayo Clinic, Rochester, Minnesota.

Editor’s Note: A Commentary by K. Fallin-Bennett appears on pages 549–552.

Funding/Support: Support for this research was provided by the National Heart, Lung, and Blood Institute (NHLBI) of the National Institutes of Health (NIH) under award number R01 HL085631. J.M. Przedworski was supported by the National Cancer Institute under award number R25CA163184. R.R. Hardeman was additionally supported by the NHLBI Supplement to Promote Diversity in Health Related Research of the NIH under award number 3 R01 HL085631-02S2.

Other disclosures: None reported.

Ethical approval: This research study was approved by the human subjects institutional review boards of the Mayo Clinic (IRB #13-004612, approved 7/13/2013) and the University of Minnesota (IRB #0905S66901, approved 6/5/2009).

Disclaimer: The views expressed in this article are those of the authors and do not necessarily represent the position or policy of the Department of Veterans Affairs or the National Institutes of Health.

Supplemental digital content for this article is available at http://links.lww.com/ACADMED/A261.

Correspondence should be addressed to Sara E. Burke, 2 Hillhouse Ave., New Haven, CT 06511; telephone: (203) 432-4500; e-mail: sara.burke@yale.edu.

A recent Institute of Medicine (IOM) report noted that gay and lesbian individuals “face discrimination in the health care system that can lead to an outright denial of care or to the delivery of inadequate care.”1(p62) Biases among health care providers may help explain a number of observed health disparities faced by these sexual minority groups, such as possible higher risks for cancer, HIV/AIDS, and eating disorders as well as less use of preventive health services.1,2 As a result, the IOM report called for more research on provider attitudes toward gay and lesbian individuals as a next step toward addressing unequal treatment. Given that medical schools represent a critical context in which lay people become providers, understanding the attitudes of heterosexual students entering the medical profession is an important aspect of building a medical school curriculum that can effectively address biases and help ensure that future physicians will provide high-quality care for sexual minorities.

In this study, we aimed to assess the amount of bias against gay and lesbian people (i.e., less favorable attitudes toward gay and lesbian people relative to heterosexual people) among heterosexual first-year medical students and to investigate factors that may predict such bias. We examined both explicit and implicit attitudes. Explicit attitudes are consciously controlled and are traditionally assessed using self-report measures such as feeling thermometers.3,4Implicit attitudes are automatic responses that often occur outside conscious awareness5,6 and are commonly measured using response-latency tasks such as the Implicit Association Test (IAT).7 Implicit attitudes help explain behavioral outcomes that cannot be predicted from explicit attitudes alone.6 For example, implicit racial bias has been shown to predict provider decisions and demeanor that result in lower quality of care for black patients.8–12 Explicit attitudes are susceptible to social desirability concerns, so they often appear more favorable than implicit attitudes.5,13

Explicit negative attitudes toward homosexuality have declined (but have not disappeared) in recent years,14 particularly among well-educated individuals.15 However, even when explicit bias becomes socially unacceptable, implicit bias tends to remain prevalent.16–18 We therefore predicted that implicit bias against gay and lesbian individuals would be pervasive among heterosexual first-year medical students, even those who avoided expressing explicit bias.

We focused on two characteristics that may predict bias among medical students—prior contact with sexual minorities (contact) and self-reported empathic tendencies (empathy).19,20 One of the most robust predictors of lower levels of bias is previous experience with members of the group in question.21 Both greater frequency of contact (quantity or amount) and more positive contact (quality or favorability) predict more positive intergroup attitudes.22,23 Even brief contact can mitigate bias against sexual minorities.19,22 In one study at a single medical school, encouraging direct contact by bringing gay and lesbian speakers into the classroom resulted in reduced levels of explicit antihomosexual attitudes.24 Research with other groups also suggests that intergroup contact can mitigate implicit biases.25 In line with past work, we hypothesized that both amount and favorability of prior contact would be associated with lower levels of explicit and implicit bias.

Empathy is a second consistent predictor of positive attitudes toward a range of groups.26 There are two types of empathy—cognitive and emotional.27,28Cognitive empathy involves trying to think about things from another’s perspective (perspective-taking); emotional empathy reflects having compassionate and sympathetic feelings (empathic concern).29 Both cognitive and emotional empathy can be measured as traits or states and relate to positive intergroup attitudes in general.26,30,31 More specifically, there is correlational evidence from college student samples that both cognitive and emotional empathy predict positive attitudes toward gay and lesbian targets.20 Therefore, we hypothesized that higher scores on trait measures of perspective-taking and empathic concern would predict lower levels of bias, both explicit and implicit, in heterosexual first-year medical students.

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Method

This study was approved by the institutional review boards of the Mayo Clinic and the University of Minnesota.

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Sample

This study uses baseline data collected as part of the Medical Student Cognitive Habits and Growth Evaluation Study (the Medical Student CHANGE Study; hereafter, CHANGES), a national longitudinal study of medical students who matriculated in fall 2010 at U.S. medical schools accredited by the Liaison Committee on Medical Education. CHANGES is designed to examine changes in medical students’ well-being, experiences, and attitudes between their first year (baseline) and their last year (data not yet available) of medical school.

In the first stage of our sampling design, we stratified medical schools by geographic region (six regions) and public/private status. Because there were no private schools in the Northwest region, there were 11 strata. Schools were sampled from each stratum in roughly the same proportion (43%) using a proportional to (first-year class) size sampling methodology,32 resulting in our targeted sample of 50 schools. One military school was excluded from the sample because it had highly unique features, including acceptance policies, curriculum structure, timing, and student characteristics.

In the second stage of sampling, we sent recruitment materials via e-mail or postal mail to the 5,823 first-year students at these 49 medical schools whose e-mail address or mailing address we were able to obtain from the Association of American Medical Colleges (AAMC) (collected via an item about CHANGES added to the Matriculating Student Questionnaire in 2010), snowball sampling, and a list we purchased from a vendor (for details, see Supplemental Digital Figure 1 at http://links.lww.com/ACADMED/A261). The students who volunteered to participate completed an online questionnaire during their first semester of medical school (between October 2010 and January 2011). All 4,732 respondents (81% response rate; 55% of the 8,594 first-year students enrolled at the 49 sampled schools) gave informed consent and received a $50.00 incentive. This response rate is comparable to those of other published studies of medical students.33

As part of the larger CHANGES survey, respondents indicated their age, gender, race/ethnicity, and sexual orientation. For this report, we excluded respondents who marked “bisexual,” “homosexual,” or “other” for their sexual orientation, as well as those who chose not to respond to that question, leaving only the 4,441 respondents (94%) who marked “heterosexual.”

We categorized respondents who identified with multiple racial/ethnic groups into just one of those groups, in the following order: black, Hispanic/Latino, South Asian, East Asian, and white. In conducting the main analysis, we excluded respondents who did not reply to this question as well as respondents from racial/ethnic groups beyond the five listed because there were too few of them to support generalizable conclusions.

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Measures

Explicit attitudes toward gay men and lesbian women.

We measured explicit attitudes using a validated feeling thermometer technique for assessing social attitudes, in which respondents indicated their feelings toward certain groups of people by moving a slider.3,4 Numbers along the side of the thermometer ranged from 0 (“very cold or unfavorable”) to 100 (“very warm or favorable”). To help guide responses, the thermometer was marked in increments of 10, but responses were recorded to an integer degree of precision. Respondents completed separate thermometer measures for “gay men,” for “lesbians,” and for several groups pertinent to other goals of the larger study, including racial groups (e.g., “Caucasians”).

The separate feeling thermometer ratings for lesbians and for gay men were highly correlated, r(4324) = 0.92, P < .0001. Therefore, for our main dependent measure, we averaged these ratings to create a composite feeling thermometer score for gay and lesbian targets. For the purpose of prevalence estimates only, explicit bias was defined by a composite score for gay and lesbian targets that was lower than the rating for Caucasian targets.

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Implicit attitudes toward gay men and lesbian women.

We measured implicit attitudes using the IAT, a validated measure of automatic, unconscious attitudes that can be adapted to measure attitudes toward many different groups.7 The sexual orientation IAT in this study, which was identical to the Sexuality IAT from Project Implicit, compared the amounts of time required to categorize images associated with heterosexuality and homosexuality (e.g., line drawings of couples) at the same time as positive and negative words (e.g., joy, hurt).34 About half of the respondents in our sample (n = 2,141) were randomly assigned to complete this IAT; the rest were assigned to a different IAT and were excluded from our analysis procedures involving implicit bias in this report. (We retained all heterosexual respondents with complete data for analysis procedures involving our explicit attitude measure.)

We computed IAT D-scores, representing differences in valenced associations with heterosexual and homosexual targets, as suggested by Greenwald et al.35 Positive scores indicate positive implicit evaluations, and negative scores indicate negative implicit evaluations of gay and lesbian people relative to heterosexual people. We chose this scoring system, even though it is the opposite of the traditional scoring system (in which larger positive scores indicate more bias), to facilitate comparison with the explicit attitude measure (the composite thermometer score).

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Contact.

We measured amount of contact by asking participants to indicate how much interaction they had with “gay, lesbian, or bisexual individuals” prior to medical school, using a four-point response scale ranging from “none” (1) to “substantial” (4). We measured favorability of contact by asking participants to indicate how favorable their interactions with sexual minorities had been prior to medical school, using a four-point response scale ranging from “very unfavorable” (1) to “very favorable” (4).36

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Empathy.

We assessed individual differences in empathy using two subscales of the Interpersonal Reactivity Index, each consisting of seven statements with seven-point response scales ranging from “strongly disagree” (1) to “strongly agree” (7).27,37 These subscales were empathic concern (α = .83) and perspective-taking (α = .79). Empathic concern included items such as “I am often quite touched by things that I see happen.” Perspective-taking included items such as “Before criticizing somebody, I try to imagine how I would feel if I were in their place.” (For the items included in the two scales, see Supplemental Digital Appendix 1 at http://links.lww.com/ACADMED/A261.)

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Analysis

First, we estimated the prevalence of explicit bias and implicit bias by examining means and frequencies. Second, we assessed the predictors of explicit and implicit attitudes separately by constructing linear regression models, adjusting for the complex sampling probabilities and including respondent demographics (age, gender, and race) as covariates. In both models, the main predictors of interest were amount of contact with sexual minorities, favorability of contact, the interactive effect between amount and favorability of contact, empathic concern, and perspective-taking.

In the explicit attitudes model, our dependent measure was the composite feeling thermometer score. We also examined alternative regression models both with and without the demographic covariates, with the composite feeling thermometer score and the individual feeling thermometer ratings for gay men and for lesbian women (separately) as response variables. In all six models, the terms of interest involving contact and empathy had identical signs and outcomes of hypothesis tests as well as similar effect sizes, so only the results for the composite measure with demographic covariates are reported below. Feeling thermometer ratings were available for 4,326 respondents; we excluded 183 cases with missing data on any predictor (including demographic predictors), leaving 4,143 respondents.

In the implicit attitudes model, our dependent measure was the IAT D-score, which was available for 2,141 respondents. We excluded 97 cases with missing data on any predictor (including demographic predictors), leaving 2,044 respondents.

In all regression models, we computed unstandardized coefficients (b) with all continuous variables (except the response variable) centered at the mean and all categorical variables dummy coded. Unstandardized coefficients represent the number of units by which the outcome variable (measured on a continuous scale) is expected to change for each unit increase in the predictor variable. We computed standardized coefficients (β) with all variables, including dummy codes and the response variable, centered and rescaled such that means were 0 and variances were 1. Standardized coefficients represent the number of standard deviations (SDs) by which the outcome variable is expected to change for each SD increase in the predictor variable.

All analysis procedures were carried out using R version 2.15.0 (R Foundation for Statistical Computing, http://www.r-project.org/), using the “survey” package version 3.29-4 to account for the complex sampling design in regression models.

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Results

Of the 4,441 heterosexual first-year medical students in our sample, 2,206 (49.67%) were male and 2,765 (62.26%) were white. They ranged in age from 19 years to 49 years (mean = 24, SD = 3). Our sample’s demographic characteristics (see Table 1) were similar to those of all students who matriculated at U.S. medical schools in 2010. For example, the AAMC reported that among 18,665 matriculants in 2010, 9,909 (53.1%) were male and 10,655 (57.1%) were white.38

Table 1

Table 1

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Explicit and implicit biases against gay and lesbian individuals

Feeling thermometer ratings of lesbian women (mean = 76.87, SD = 23.38) and gay men (mean = 77.22, SD = 23.71) were similar. Because of the length of the CHANGES survey and concerns about respondent fatigue, we did not include a measure of explicit attitudes toward heterosexual targets. To evaluate explicit attitudes toward gay and lesbian targets relative to a nonstigmatized majority group, we compared these ratings with those given for Caucasian targets (mean = 85.33, SD = 18.12). Ratings for lesbian women (P < .0001, Cohen d = 0.45, 95% confidence interval [CI] = 7.90–9.03), ratings for gay men (P < .0001, d = 0.42, 95% CI = 7.56–8.72), and the composite scores (P < .0001, d = 0.45, 95% CI = 7.73–8.83) were all significantly lower than ratings for Caucasian targets. To estimate the prevalence of explicit bias, we counted those respondents who gave a lower feeling thermometer rating to lesbian and gay targets (composite score) than to Caucasian targets. Nearly half (45.79%; 956/2,088) of respondents with complete data on both measures of bias expressed at least some explicit bias against gay and lesbian individuals.

Our measure of implicit bias was the IAT D-score, for which negative scores indicate bias against gay and lesbian targets. The mean level of implicit bias in our sample of heterosexual medical students (mean = −0.44, SD = 0.47) was slightly more pronounced than the mean level in Project Implicit’s sample (convenience sample of general population, not restricted to heterosexual participants, N = 269,683; mean = −0.35, SD = 0.47 [sign of mean inverted to be congruent with our scoring system]),34P < .0001, d = 0.19, 95% CI = −0.46 to −0.42. Most (81.51%; 1,702/2,088) respondents with complete data on both measures of bias exhibited at least some implicit bias against gay and lesbian individuals (i.e., IAT D-scores < 0). Even among respondents who avoided expressing any explicit bias, about three-quarters (74.29%; 841/1,132) showed implicit bias (see Chart 1).

Consistent with previous research,6,39 IAT D-scores were only modestly related to explicit attitudes in a simple linear regression model accounting for the sampling design, β = .20, b = 9.92, standard error (SE) = 1.26, P < .0001.

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Predicting explicit attitudes toward gay and lesbian individuals

Table 2 summarizes the results of the complete regression model evaluating contact and empathy as predictors of explicit attitudes (feeling thermometer ratings of gay and lesbian targets).

Table 2

Table 2

As we hypothesized, in the same model and in the absence of an interactive effect, both amount of contact (β = .09, b = 2.49, SE = 0.50, P < .0001) and favorability of contact (β = .40, b = 14.58, SE = 0.75, P < .0001) independently predicted positive attitudes. In addition, the interaction between favorability and amount of contact significantly predicted explicit attitudes, β = −.09, b = −3.91, SE = 0.72, P < .0001. This interaction suggests that the effect of amount of contact depended on how favorable respondents perceived the contact to be. To illustrate this dependency, we reestimated the linear effect of amount of contact with favorability of contact centered at 1 SD below the mean (representing relatively unfavorable contact) and 1 SD above the mean (representing relatively favorable contact).40 Among respondents who rated their contact with sexual minorities as relatively unfavorable, increasing amounts of contact strongly predicted positive attitudes, b = 5.04, SE = 0.76, P < .0001. In contrast, among participants who rated their contact as relatively favorable, amount of contact was unrelated to explicit attitudes, b = 0.06, SE = 0.59, P = .92. Thus, amount of contact was a strong predictor of positive attitudes when contact was unfavorable, but became increasingly less important as the favorability of contact increased.

Our second set of key predictors, included in the same regression model, pertained to the two types of empathy—perspective-taking (cognitive empathy) and empathic concern (emotional empathy). As predicted, higher levels of perspective-taking predicted more positive attitudes, β = .06, b = 1.51, SE = 0.35, P = .0001. Higher levels of empathic concern also predicted more positive attitudes, β = .10, b = 2.56, SE = 0.41, P < .0001.

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Predicting implicit attitudes toward gay and lesbian individuals

Table 3 summarizes the results of the complete regression model evaluating contact and empathy as predictors of implicit attitudes.

Table 3

Table 3

Our first set of key predictors pertained to contact. As expected, both amount of contact (β = .17, b = 0.09, SE = 0.01, P < .0001) and favorability of contact (β = .11, b = 0.08, SE = 0.02, P = .0002) strongly predicted positive implicit attitudes. Adding the interaction between amount and favorability to the model did not explain additional variance, β = .01, b = 0.01, SE = 0.02, P = .60.

Our second set of key predictors, included in the same regression model, pertained to empathy. Neither perspective-taking (β = .06, b = 0.03, SE = 0.02, P = .06) nor empathic concern (β = −.04, b = −0.02, SE = 0.01, P = .16) significantly predicted implicit attitudes over and above the effects of contact.

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Discussion

Previous work has documented disparities in care and discrimination against gay men and lesbian women in the health care system1; this study examined part of the basis for these disparities by documenting implicit bias and explicit bias against lesbian and gay individuals among future medical providers. The prevalence of negative attitudes presents an important challenge for medical education, highlighting the need for more research on how to address possible causes of bias. We identified two specific predictors of negative attitudes that could facilitate the development of curriculum-based interventions aimed at ensuring high-quality care for sexual minorities.

Consistent with intergroup contact theory,22 we found that more frequent and more positive intergroup contact predicted more positive attitudes toward gay men and lesbian women. Although our correlational results should be interpreted cautiously, they hint at four possible medical education interventions—and potential avenues for experimental or longitudinal research to test the interventions’ causal efficacy. First, instructors could include gay men and lesbian women on speaker panels24,41 to provide students with a small number of high-quality positive contact experiences, which our results suggest can be related to explicit or overt bias (when contact experiences were highly favorable, the amount of contact ceased to be an important predictor of explicit attitudes). Second, because prior experimental research has shown that appropriately constructed imagined contact can have positive outcomes,42 instructors could include patient sexual orientation information in clinical scenarios as part of case-based medical training. Third, medical schools could increase heterosexual students’ contact with gay and lesbian peers by implementing programs to recruit more sexual minority students.43 Interventions designed to increase the number of lesbian and gay students may be especially promising because prior experimental research has shown that equal-status contact is particularly effective for reducing intergroup bias.21,22,25 Fourth, administrators and faculty could encourage the development of an identity-affirming environment to help mitigate lesbian and gay students’ feelings that they “don’t fit in.” Some theorists have suggested that such an intervention could increase the proportion of sexual minority students who are open about their sexual orientation and reduce the likelihood that they will drop out.44

In this study, greater cognitive empathy (perspective-taking) and emotional empathy (empathic concern) were associated with more positive explicit attitudes toward lesbian and gay targets, but neither type of empathy significantly predicted implicit attitudes. These results are consistent with past work showing that contact is a more important predictor of implicit attitudes than dispositional variables like empathy,25 but our data do suggest that empathy helps explain overt bias. Empathy has been shown to decline gradually as students progress through medical school,37 and this decline has been identified as a source of general problems with patient care.45,46 Our study reveals that low levels of empathy relate to explicit bias against gay and lesbian people even as early as the first year of medical training, suggesting that the decline in empathy observed over time could have more serious implications for gay and lesbian patients as students progress through medical school and, potentially, into medical practice. Although we cannot draw causal conclusions from our correlational data, our results suggest that taking steps to prevent empathy decline could help mitigate overt bias against sexual minorities. There is promising work47,48 suggesting that interventions can be designed to increase long-term empathy, but more direct evidence of their efficacy is needed.

Past research has suggested that perspective-taking is one of the most important processes by which contact facilitates positive intergroup attitudes,49 and efforts to increase perspective-taking and empathic concern over the long term have been suggested as a way to help providers reduce unintentional racial bias.41 However, other work has suggested that merely striving to adopt the perspective of a target group member can lead to greater anxiety and social distancing from the target group in situations where stereotypes are highly salient.50 Therefore, interventions designed to increase empathy should be careful not to focus exclusively on perspective-taking.

The primary limitation of this study is its correlational nature. For example, we cannot determine whether positive attitudes cause positive contact experiences, or vice versa. An ongoing longitudinal assessment of this group of students will help us ascertain whether changes in contact or empathy precede changes in attitudes. Additionally, we have reported statistical effects that explain only a small proportion of the variance in attitudes toward gay men and lesbian women. Such small effect sizes are typical in research examining intergroup attitudes.19,22,51 Although no single set of related variables can fully explain these multifaceted social phenomena, computer simulations suggest that even very small differences in bias can contribute to substantial structural inequalities.52

A further limitation is that this study did not directly measure discriminatory behavior. Future research should examine the relationship between biases harbored by students and treatment of gay and lesbian patients, as has been done in work on racial biases.11 Finally, our sample may have included some sexual minority students, if any respondents marked “heterosexual” because of concerns about stigma or confidentiality.

Pervasive bias against gay and lesbian people presents a serious problem that medical education must address to mitigate health inequalities. Steps to increase positive intergroup contact experiences and to promote empathy represent promising educational and research possibilities.

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References

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