Intergroup abortion bias: Investigating whether intergroup processes underlie the abortion
debate

Introduction

Across countries, there is much public debate and social commotion about the
legalization of abortion, with many countries moving away from policies that supported the right
of abortion towards policies focused on pro-life objectives and the illegalization of abortion
(Forster, 2022; Smith, 2005). In the USA, 61% of adults believe abortion should be entirely or
mostly legal, while 37% say it should be illegal (Hartig, 2022). Despite the societal relevance of
the topic, abortion is only sparsely covered in the social psychological literature and when it is,
the main focus is on abortion as a moral issue (e.g., Pacilli et al., 2018). In the present research,
we examine whether the current abortion debates can also be approached as a social issue by
investigating whether intergroup processes may underlie people’s support for abortion. More
specifically, we investigate whether the ethnic group-membership of those who seek abortion
plays a role in people’s support for abortion.

Theoretical Background

Previous research demonstrates that people regularly show intergroup biases (Hewstone
et al., 2002; Tajfel & Turner, 1979). People often automatically organize themselves and others
into social groups and categorization based on ethnicity or race is one of the most essentialized,
tenacious, and leads to discrimination (Bain et al., 2009). Indeed, discrimination is widespread
and expressed through inequality in labor market opportunities, educational chances, and
healthcare (James, 2017; Lancee, 2021; Noguera, 2017). However, in the abortion context, we do
not yet know whether such bias exists and whether this may help explain recent political trends
of moving away from supportive abortion policies. This research aims to fill this gap. We test
whether intergroup processes based on ethnicity may play an underlying role in support for
abortion. Specifically, we are investigating how supportive White people are towards Black (the
outgroup) versus White (the ingroup) women seeking abortion. There are four possible
outcomes. Outcome 1, people could be generally supportive or, outcome 2, unsupportive of
women seeking abortion irrespectively of ethnic group-memberships of those who seek abortion
(i.e., they show no intergroup bias). Outcome 3, people could be more supportive of White
women who seek abortion compared to Black women. This outcome would be an expression of
ingroup favoritism, where more rights are allocated to ingroup members (Han, 2018; Tajfel &
Turner, 1986). Finally, outcome 4, people could be more supportive of Black women seeking
abortions compared to White women. We would refer to the latter as the Intergroup Abortion
Bias (IAB) effect. If we find this effect, it would suggest that the anti-abortion movement is
(partially) driven by a motive for population control by constraining abortion for the ethnic
ingroup but not for the outgroup. This aligns with recent cross-country data which shows that
individuals have presented concerns about the growing percentages of non-Whites (IOM, 2018)
and in the USA, the prediction is that by 2043 the country will become a minority-majority
nation (Taylor, 2014).

We argue that the expression of IAB depends on two factors, that is, people’s social
dominance orientation, and people’s prepositional stance in the abortion debate. Firstly, we
theorize that one of the underlying factors that could explain when the IAB occurs is related to
the individuals’ levels of social dominance orientation (i.e., SDO). SDO is the tendency to accept
and prefer group-based hierarchy and inequality and is often expressed by the majority group to
maintain social dominance (Sidanius et al., 1994). We hypothesize that when people score high
in SDO, they show more IAB than those low in SDO. That is, by supporting outgroup abortion
while rejecting ingroup abortion, individuals with a high SDO score may subtly engage in
population control behaviors to maintain their larger population size in society and their social
dominant position.

Secondly, we argue that the expression of an intergroup abortion bias depends on the
prepositional stance people take in the abortion debate. At the extreme end of the debate,
abortion is considered a sin and an immoral act (pro-life), while at the opposite end, it is
considered a basic human right (pro-choice). In this case, abortion is a moral issue and when
individuals have strong moral convictions it is part of their core inner beliefs that should
theoretically not be influenced by contextual factors such as the characteristics of the woman
seeking abortion (Skitka et al., 2005). Hence, at the extreme ends of the abortion debate, an
intergroup bias is less likely to occur.

For this reason, at the moment and for the purpose of this report, we will focus on what
happens to people’s support for abortion when they are not highly polarized in the abortion
debate. That is, when participants perceptions on abortion is more ambiguous and not clearly
defined as a pro-life (i.e., immoral issue) or pro-choice (i.e., human right), we can expect
different patterns. When abortion is considered an important right for women, ingroup favoritism
may manifest as less support for Black women (the outgroup) seeking abortion compared to
White women (the ingroup). This would suggest that outgroup members may be excluded from
essential rights and placed outside the boundaries of justice, fairness, and healthcare accessibility
(Hewstone et al., 2002). Conversely, if abortion is viewed negatively, an intergroup abortion bias
might manifest as more support for Black women seeking abortion than for White women. In
this scenario, the outgroup faces less judgment and scrutiny from violating the ingroup’s
standards, and the significance of “life” of the outgroup’s embryos or fetuses may be
downplayed.

The Current Research

Through the EASP Seedcorn grant, we were thus far able to run four studies by collecting
data on Prolific Academic with American participants.

In the first pilot study (N = 55 American adults; Mage = 37.96, SE = 1.77; predominantly
White, 78.18%) we wanted to pre-test the experimental materials. Specifically, we developed
various scenarios of women seeking abortion and pretested their clarity, comprehension, and
veracity. Moreover, we tested the scenarios for ethnic non-stereotypicality. Each scenario was
written without specifying the woman’s age, ethnicity, or relationship status, and with the intent
to convey that the woman is on the verge of making a decision. Next, we adapted a measurement
for support for abortion based on previous research (e.g., Carlton et al., 2000; Smith et al., 2012).
This scale consisted of 14 items and demonstrated high reliability (ω = .97). We also explored
participants’ perceptions by asking them to report whether they imagined the woman in the
scenario as White (1) or Black (7). In general, we found that the scenarios were not
stereotypically associated with a White or Black woman. However, preliminary results indicated
a marginal positive association to support abortion, the more participants perceived the scenario
to be about a Black woman as opposed to a White woman.

Contrary to what we initially proposed in our grant submission to EASP, we decided to
conduct an additional pilot study. Our goal was to further test the materials and the full paradigm
of the study. In this second pilot study (N = 50 American adults; Mage = 42.06, SE = 2.18;
predominantly White, 94%), we presented participants with the scenario selected from the first
pilot study and measured support for abortion, ethnic stereotypicality of the woman in the
scenario, and SDO using an 8-item scale validated by Ho et al. (2015). Moreover, we asked
participants to attribute positive and negative emotions to the woman in the scenario. The results
confirmed the trend observed in the first pilot study. Specifically, a positive association was
found between support for abortion and the perception that the scenario involved a Black woman
rather than a White woman. Moreover, there was a slight marginal trend indicating that support
for abortion increased with the perception of the case involving a Black woman and higher SDO
levels.

In Study 1, we aimed to build on previous pilot studies by expanding our sample size and
employing a more rigorous analytical approach to investigate the effects of ethnic
stereotypicality, SDO, and individuals’ prepositional stances in the abortion debate (pro-life vs.
pro-choice) on support for abortion . We collected data from 297 American participants (Mage =
43.1, SEage = 1.40; predominantly White, 98.3%) and used a moderated moderation analysis
(Model 3; Hayes, 2022) to examine the interactions between such variables in predicting support
for abortion. Results showed that there was a marginal main effect indicating that the more
participants perceived the woman in the scenario as Black, as opposed to White, the less
supportive they were of abortion. Moreover, we also observed a significant effect of participants’
SDO levels, with higher SDO scores correlating with decreased support for abortion. Participants
who leaned more towards the pro-choice stance also exhibited greater support for abortion.
Crucially, these main effects were qualified by significant interactions among the variables.
Simple effects analyses demonstrated that at the mean level of the prepositional stance people
take in the abortion debate, participants who perceived the woman seeking an abortion as Black
showed higher support for abortion when their SDO levels were high. This suggests that support
for abortion may increase when the woman is perceived as an outgroup member, especially
among those with higher SDO scores and that are not at the extreme ends of the abortion debate.
In contrast, participants who perceived the woman as White showed lower support for abortion
under similar conditions. These findings provide preliminary evidence supporting our hypothesis
of IAB. However, the correlational nature of this study precludes us from inferring a causal
relationship. To address this, we developed Study 2.

In Study 2, we sought to overcome the correlational limitations of Study 1 by using an
experimental design. White American participants (N = 300; Mage = 39.1, SEage = .757) were
presented with the previously validated scenario along with a blurred photo of either a Black or
White woman. This manipulation allowed us to examine the causal impact of perceived ethnicity
on support for abortion. Participants were then asked to answer the same questions as in Study 1.
We followed the same data analysis procedures as in Study 1. Results showed that there was a
significant main effect of the woman’s perceived skin color. Participants showed higher support
for abortion when the scenario was presented with a photo of a Black woman compared to a
White woman. In addition, we found that higher levels of SDO were associated with lower
support for abortion. Participants who leaned more towards a pro-choice stance exhibited greater
support for abortion, aligning with their ideological position on the issue. Importantly, as
predicted, simple effects analysis showed a marginal effect where participants exhibited higher
support for abortion for the Black (vs. White) woman, particularly when their SDO levels were
high and scored at the mean stance of the abortion debate. However, this pattern of results was
not captured by a significant three-way interaction among the variables.

Taken together these findings show preliminary evidence supporting the intergroup
abortion bias (IAB). Further analyses will include the different levels of prepositional stance
people take in the abortion debate into account. Also, future studies (still in development) will
deepen our understanding of this bias, test additional hypotheses (i.e., dehumanization effect),
and seek to replicate these results with samples from other countries (e.g., Brazil, Italy, The
Netherlands). Thanks to the EASP seedcorn grant we were able to continue working together on
the idea we had during the 2022 EASP Summer School. We hope these results will call attention
to the development of other studies on the topic, and public policies addressing the important
social issue of abortion.

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