The role of free will beliefs in social behavior: Priority areas for future research.

Recent research has examined the consequences that holding views about free will has on social behavior. Specifically, through manipulating people's belief in free will, researchers have tested the psychological and behavioral consequences of free will belief change. However, findings of such manipulations have been shown to be relatively small and inconsistent. The purpose of this paper is to outline four key areas for researchers in this area to consider. We believe considering these areas will give a more nuanced understanding of the role of free will beliefs.

Manipulating Belief in Free Will and Its Downstream Consequences: A Meta-Analysis.

Ever since some scientists and popular media put forward the idea that free will is an illusion, the question has risen what would happen if people stopped believing in free will. Psychological research has investigated this question by testing the consequences of experimentally weakening people's free will beliefs. The results of these investigations have been mixed, with successful experiments and unsuccessful replications. This raises two fundamental questions: Can free will beliefs be manipulated, and do such manipulations have downstream consequences? In a meta-analysis including 145 experiments (95 unpublished), we show that exposing individuals to anti-free will manipulations decreases belief in free will and increases belief in determinism. However, we could not find evidence for downstream consequences. Our findings have important theoretical implications for research on free will beliefs and contribute to the discussion of whether reducing people's belief in free will has societal consequences.

Group membership does not modulate automatic imitation.

Individuals have the automatic tendency to imitate each other. A key prediction of different theories explaining automatic imitation is that individuals imitate in-group members more strongly than out-group members. However, the empirical basis for this prediction is rather inconclusive. Only a few experiments have investigated the influence of group membership using classic automatic imitation paradigms and these experiments led to mixed results. To put the group membership prediction to a critical test, we carried out six high-powered experiments (total N = 1538) in which we assessed imitation with the imitation-inhibition task and manipulated group membership in different ways. Evidence across all experiments indicates that group membership does not modulate automatic imitation. Moreover, we do not find support for the idea that feelings of affiliation or perceived similarity moderate the effect of group membership on automatic imitation. These results have important implications for theories explaining automatic imitation and contribute to the current discussion of whether automatic imitation can be socially modulated.

Free to blame? Belief in free will is related to victim blaming.

The more people believe in free will, the harsher their punishment of criminal offenders. A reason for this finding is that belief in free will leads individuals to perceive others as responsible for their behavior. While research supporting this notion has mainly focused on criminal offenders, the perspective of the victims has been neglected so far. We filled this gap and hypothesized that individuals' belief in free will is positively correlated with victim blaming-the tendency to make victims responsible for their bad luck. In three studies, we found that the more individuals believe in free will, the more they blame victims. Study 3 revealed that belief in free will is correlated with victim blaming even when controlling for just world beliefs, religious worldviews, and political ideology. The results contribute to a more differentiated view of the role of free will beliefs and attributed intentions.

The influence of threat on perceived spatial distance to out-group members.

A classic example of discriminatory behavior is keeping spatial distance from an out-group member. To explain this social behavior, the literature offers two alternative theoretical options that we label as the "threat hypothesis" and the "shared-experience hypothesis". The former relies on studies showing that out-group members create a sense of alertness. Consequently, potentially threatening out-group members are represented as spatially close allowing the prevention of costly errors. The latter hypothesis suggests that the observation of out-group members reduces the sharing of somatosensory experiences and, thus, increases the perceived physical distance between oneself and others. In the present paper, we pitted the two hypotheses against each other. In Experiment 1, Caucasian participants expressed multiple implicit "Near/Far" spatial categorization judgments from a Black-African Avatar and a White-Caucasian Avatar located in a 3D environment. Results indicate that the Black-African Avatar was categorized as closer to oneself, as compared with the White-Caucasian Avatar, providing support for "the threat hypothesis". In Experiment 2, we tested to which degree perceived threat contributes to this categorization bias by manipulating the avatar's perceived threat orthogonally to group membership. The results indicate that irrespective of group membership, threatening avatars were categorized as being closer to oneself as compared with no threatening avatars. This suggests that provided information about a person and not the mere group membership influences perceived distance to the person.

Belief in free will affects causal attributions when judging others' behavior.

Free will is a cornerstone of our society, and psychological research demonstrates that questioning its existence impacts social behavior. In six studies, we tested whether believing in free will is related to the correspondence bias, which reflects people's automatic tendency to overestimate the influence of internal as compared to external factors when interpreting others' behavior. All studies demonstrate a positive relationship between the strength of the belief in free will and the correspondence bias. Moreover, in two experimental studies, we showed that weakening participants' belief in free will leads to a reduction of the correspondence bias. Finally, the last study demonstrates that believing in free will predicts prescribed punishment and reward behavior, and that this relation is mediated by the correspondence bias. Overall, these studies show that believing in free will impacts fundamental social-cognitive processes that are involved in the understanding of others' behavior.

The hand of God or the hand of Maradona? Believing in free will increases perceived intentionality of others' behavior.

The question of whether free will actually exists has been debated in philosophy for centuries. However, how belief in free will shapes the perception of our social environment still remains open. Here we investigate whether belief in free will affects how much intentionality we attribute to other people. Study 1a and 1b demonstrate a weak positive relation between the strength of belief in free will and the perceived intentionality of soccer players committing handball. This pattern even holds for behavior that is objectively not intentional (i.e., when the player touches the ball accidentally). Going one step further, in Study 2 we find a weak correlation between belief in free will and perceiving intentions in very abstract geometrical shapes. These findings suggest that whether individuals believe in free will or not changes the way they interpret others' behavior, which may have important societal consequences.

It Is Belief in Dualism, and Not Free Will, That Best Predicts Helping: A Conceptual Replication and Extension of Baumeister et al. (2009).

Previous research found that experimentally reducing people's belief in free will affects social behaviors. However, more recent investigations could not replicate several findings in this literature. An explanation for the mixed findings is that free will beliefs are related to social behaviors on a correlational level, but experimental manipulations are not able to detect this relation. To test this interpretation, we conceptually replicated and extended a landmark study in the free will belief literature originally conducted by Baumeister et al. In five studies (total N = 1,467), we investigated whether belief in free will predicts helping behavior in comparison to other beliefs related to free will. Overall, our results support the original findings, as belief in free will correlated with helping behavior. However, the results also show that the best predictor of helping behavior is not belief in free will but belief in dualism. Theoretical implications are discussed.

When do chronic differences in self-regulation count? Regulatory focus effects in easy and difficult soccer tasks.

Research on regulatory focus theory (Higgins, 1997) suggests that performance increases if instructions fit with sportspersons' dispositions. Sportspersons who chronically focus on wins (i.e., promotion-oriented individuals) perform best if instructions frame the objective as a promotion goal (e.g., "Try to hit!"). By contrast, sportspersons who chronically focus on losses (i.e., prevention-oriented individuals) perform best if instructions frame the objective as a prevention goal (e.g., "Try not to miss!"). Recent theorizing also suggests that regulatory focus interacts with task difficulty. In an experiment, we assessed soccer performance as a function of chronic focus, instructional focus, and task difficulty. Results support that task difficulty moderates the effects of fit on performance; fitting instructions to match the sportsperson's chronic regulatory focus improved performance in the easy rather than the difficult task. Findings are discussed regarding the role of regulatory fit in altering subjective pressure during sports performance.

Covert and overt automatic imitation are correlated.

Most theoretical accounts of imitation assume that covert and overt measures of automatic imitation tap into the same underlying construct. Despite this widespread assumption, it is not well supported by empirical evidence. In fact, the only study investigating the relation between covert and overt automatic imitation failed to find a correlation between them (Genschow et al., 2017, PLOS ONE, 12[9], Article e0183784). However, because overt and covert imitation were measured using two very different tasks, and because the measure of overt imitation was found to be unreliable, it is still not clear whether a correlation between both measures exists. Here, we address this question by reanalyzing the results of a previous virtual reality study in which automatic imitation was indexed with an overt and covert measure of gaze following, both obtained within one and the same task (Cracco et al., 2022, IScience, Article 104891). The results show that, in this situation, both types of imitation do correlate. As such, our results provide support for the idea that overt and covert measures of automatic imitation measure the same underlying construct.

Group membership does not modulate goal- versus movement-based imitation.

It is often put forward that in-group members are imitated more strongly than out-group members. However, the validity of this claim has been questioned as recent investigations were not able to find differences for the imitation of in- versus out-group members. A central characteristic of these failed replications is their mere focus on movement-based imitation, thereby neglecting to take into consideration the superior goal of the movements. By using a computerised version of the pen-and-cups task, we disentangled movement- from goal-based imitation to shed further light onto the link between group membership and imitation. As previous research demonstrated that out-group members (as compared with in-group members) are represented psychologically distant and as psychological distance shifts the degree to which participants engage in goal- versus movement-based imitation, we predicted that in-group members (as compared with out-group members) shift the degree to which individuals imitate movements versus goals. The results did not confirm our predictions, as group membership does not modulate the degree of movement- versus goal-based imitation. Theoretical implications and the question whether imitative behaviour is socially modulated are discussed.

Top-Down Modulation of Motor Priming by Belief About Animacy.

Research has shown that people automatically imitate others and that this tendency is stronger when the other person is a human compared with a nonhuman agent. However, a controversial question is whether automatic imitation is also modulated by whether people believe the other person is a human. Although early research supported this hypothesis, not all studies reached the same conclusion and a recent meta-analysis found that there is currently neither evidence in favor nor against an influence of animacy beliefs on automatic imitation. One of the most prominent studies supporting such an influence is the study by Liepelt and Brass (2010), who found that automatic imitation was stronger when participants believed an ambiguous, gloved hand to be human, as opposed to wooden. In this registered report, we provide a high-powered replication of this study (N = 199). In contrast to Liepelt and Brass (2010), we did not find an effect of animacy beliefs on automatic imitation. However, we did find a correlation between automatic imitation and perceived self-other similarity. Together, these results suggest that the gloved hand procedure does not reliably influence automatic imitation, but interindividual differences in perceived similarity do.

It Matters to Whom You Compare Yourself: The Case of Unrealistic Optimism and Gender-Specific Comparisons.

Unrealistic Optimism (UO) appears when comparing participants' risk estimates for themselves with an average peer, which typically results in lower risk estimates for the self. This article reports nuanced effects when comparison varies in terms of the gender of the peer. In three studies (total N = 2,468, representative sample), we assessed people's risk estimates for COVID-19 infections for peers with the same or other gender. If a peer's gender is not taken into account, previous studies were replicated: Compared with others, participants perceived themselves as less likely to get infected with COVID-19. Interestingly, this effect was qualified by gender: Respondents perceived women as less threatened than men because women are perceived as more cautious and compliant with medical guidelines.

Do unbiased people act more rationally?-The case of comparative realism and vaccine intention.

Within different populations and at various stages of the pandemic, it has been demonstrated that individuals believe they are less likely to become infected than their average peer. This is known as comparative optimism and it has been one of the reproducible effects in social psychology. However, in previous and even the most recent studies, researchers often neglected to consider unbiased individuals and inspect the differences between biased and unbiased individuals. In a mini meta-analysis of six studies (Study 1), we discovered that unbiased individuals have lower vaccine intention than biased ones. In two pre-registered, follow-up studies, we aimed at testing the reproducibility of this phenomenon and its explanations. In Study 2 we replicated the main effect and found no evidence for differences in psychological control between biased and unbiased groups. In Study 3 we also replicated the effect and found that realists hold more centric views on the trade-offs between threats from getting vaccinated and getting ill. We discuss the interpretation and implication of our results in the context of the academic and lay-persons' views on rationality. We also put forward empirical and theoretical arguments for considering unbiased individuals as a separate phenomenon in the domain of self-others comparisons.

The color red reduces snack food and soft drink intake.

Based on evidence that the color red elicits avoidance motivation across contexts (Mehta & Zhu, 2009), two studies investigated the effect of the color red on snack food and soft drink consumption. In line with our hypothesis, participants drank less from a red labeled cup than from a blue labeled cup (Study 1), and ate less snack food from a red plate than from a blue or white plate (Study 2). The results suggest that red functions as a subtle stop signal that works outside of focused awareness and thereby reduces incidental food and drink intake.

Automatic or controlled: How does disbelief in free will influence cognitive functioning?

Most people believe in free will. Past research has indicated that reducing this belief has numerous downstream consequences including everyday outcomes as well as neural and cognitive correlates associated with a reduction of self-control. However, the exact mechanisms through which a reduction in free will belief affects self-control are still a matter of investigation. In the present registered report, we used a task switching paradigm to examine whether reducing belief in free will makes people less controlled or whether it enhances their reliance on automatic impulses. Using Bayesian sequential analysis, we failed to conceptually replicate the previous link between free will belief and cognitive control. Our registered report plan mostly accumulated substantial evidence supporting the null hypothesis. That is, diminished belief in free will does neither impact control nor automaticity. Theoretical implications of this finding are discussed.

Concurrently observed actions are represented not as compound actions but as independent actions.

Recent research suggests that we can simultaneously represent the actions of multiple agents in our motor system. However, it is unclear exactly how concurrently observed actions are represented. Here, we tested two competing hypotheses. According to the independence hypothesis, concurrently observed actions are represented as independent actions. According to the compound hypothesis, they are instead integrated, whenever possible, into compound actions. In Experiment 1 (N = 32), we first show that the standard imitation-inhibition task with a single hand can be extended to measure automatic imitation of compound actions. In Experiments 2-5 (NTotal = 368), we then investigated the representation of concurrently observed actions by further extending this task to include two hands. The results showed that two hands performing two different actions (e.g., one hand lifts index finger, one hand lifts middle finger) produced an effect similar to that of both hands performing just one of those actions (e.g., both hands lift index finger) but different from that of both hands performing both actions together (i.e., a compound action; lift both index and middle finger). This indicates that concurrently observed actions are coded as independent actions in the motor system. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

The role of attention in anticipated action effects.

Past research has shown that merely anticipating a certain action in someone else leads observers to engage in the anticipated action-a phenomenon called anticipated action. In a standard experiment on anticipated action, participants watch video clips of a model engaging in triggering events such as nose wrinkling or hair falling. A typical finding is that participants engage in more nose actions while watching the nose wrinkling video than while watching the hair falling video and vice versa for the engagement in hair actions. Whereas past research has suggested that this effect is due to inferring a desire in others to act, an alternative explanation is that observing a triggering event in someone else guides attention toward respective body parts, facilitating any action toward this body part. In two experiments we set this explanation to a critical test. The results speak against attention as driving process and in favor of inferring a desire in others to act, because guiding attention to the location of the triggering event did not result in anticipated action effects. This result has important implications for research on anticipative processes and imitative behavior. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Imitation and interindividual differences: Belief in free will is not related to automatic imitation.

It is well known that individuals have the tendency to automatically imitate each other and that such imitative behavior is fostered by perceiving intentions in others' actions. That is, past research has shown that perceiving an action as internally driven enhances the shared representation of observed and executed actions increasing automatic imitation. An interpersonal factor that increases the perception that a behavior is internally driven is belief in free will. Consequently, we hypothesized that the more individuals believe in free will, the more they automatically imitate others. To test this prediction, we conducted two high-powered (total N = 642) and preregistered studies in which we assessed automatic imitation with the imitation-inhibition task. Contrary to our predictions, belief in free will did not correlate with automatic imitation. This finding contributes to current findings challenging the assumption that automatic imitation is modulated by interindividual differences. Further theoretical implications are discussed.

A direct test of the similarity assumption - Focusing on differences as compared with similarities decreases automatic imitation.

Individuals automatically imitate a wide range of different behaviors. Previous research suggests that imitation as a social process depends on the similarity between interaction partners. However, some of the experiments supporting this notion could not be replicated and all of the supporting experiments manipulated not only similarity between actor and observer, but also other features. Thus, the existing evidence leaves open whether similarity as such moderates automatic imitation. To directly test the similarity account, in four experiments, we manipulated participants' focus on similarities or differences while holding the stimulus material constant. In Experiment 1, we presented participants with a hand and let them either focus on similarities, differences, or neutral aspects between their own hand and the other person's hand. The results indicate that focusing on similarities increased perceived similarity between the own and the other person's hand. In Experiments 2 to 4, we tested the hypothesis that focusing on similarities, as compared with differences, increases automatic imitation. Experiment 2 tested the basic effect and found support for our prediction. Experiment 3 and 4 replicated this finding with higher-powered samples. Exploratory investigations further suggest that it is a focus on differences that decreases automatic imitation, and not a focus on similarities that increases automatic imitation. Theoretical implications and future directions are discussed.