Welcome to the Nexus of Ethics, Psychology, Morality, Philosophy and Health Care

Welcome to the nexus of ethics, psychology, morality, technology, health care, and philosophy
Showing posts with label Preregistered. Show all posts
Showing posts with label Preregistered. Show all posts

Friday, May 20, 2022

Copy the In-group: Group Membership Trumps Perceived Reliability, Warmth, and Competence in a Social-Learning Task

Montrey, M., & Shultz, T. R. (2022). 
Psychological Science, 33(1), 165–174.
https://doi.org/10.1177/09567976211032224

Abstract

Surprisingly little is known about how social groups influence social learning. Although several studies have shown that people prefer to copy in-group members, these studies have failed to resolve whether group membership genuinely affects who is copied or whether group membership merely correlates with other known factors, such as similarity and familiarity. Using the minimal-group paradigm, we disentangled these effects in an online social-learning game. In a sample of 540 adults, we found a robust in-group-copying bias that (a) was bolstered by a preference for observing in-group members; (b) overrode perceived reliability, warmth, and competence; (c) grew stronger when social information was scarce; and (d) even caused cultural divergence between intermixed groups. These results suggest that people genuinely employ a copy-the-in-group social-learning strategy, which could help explain how inefficient behaviors spread through social learning and how humans maintain the cultural diversity needed for cumulative cultural evolution.

Discussion

Although previous studies have found an apparent in-group bias in social learning, they have failed to resolve whether this constitutes a genuine social-learning strategy or a mere confluence of other factors (Buttelmann et al., 2013; Howard et al., 2015). Our study disentangled group membership from similarity and familiarity by assigning group membership at random. We found that rather than eliminating the preference for in-group members, this approach resulted in a robust in-group-copying bias, which (a) was bolstered by a tendency to observe in-group members, (b) overrode participants’ stated beliefs, (c) grew stronger when social information was scarce, and (d) even caused cultural divergence between intermixed groups. Taken together, our findings suggest that people genuinely employ a copy-the-in-group strategy and that group membership has both a direct and indirect effect on copying.

Why might a copy-the-in-group strategy have evolved in the first place? One reason could be that it allowed humans to rapidly adopt and vigorously maintain group norms that enhance coordination (McElreath et al., 2003) or promote cooperation (Boyd & Richerson, 2009). Another reason could be that social learning is useful only to the extent that adopting other people’s behavior yields similar payoffs (Laland, 2004). For example, copying out-group members could be less efficient or even counterproductive if groups differ in terms of what behavior is punished or rewarded. Finally, such a strategy could also have evolved because it minimized the risk of deception. Because social learning is essentially information scrounging (Kameda & Nakanishi, 2002), in which the copier benefits from other people’s knowledge without incurring the same costs, knowledgeable individuals have an incentive to mislead others. However, this incentive is minimized when observed individuals have a vested interest in the copier’s success. This holds true in kin relationships (Laland, 2004) and likely generalizes to other settings, such as intergroup competition.

Saturday, November 6, 2021

Generating Options and Choosing Between Them Depend on Distinct Forms of Value Representation

Morris, A., Phillips, J., Huang, K., & 
Cushman, F. (2021). 
Psychological Science. 
https://doi.org/10.1177/09567976211005702

Abstract

Humans have a remarkable capacity for flexible decision-making, deliberating among actions by modeling their likely outcomes. This capacity allows us to adapt to the specific features of diverse circumstances. In real-world decision-making, however, people face an important challenge: There are often an enormous number of possibilities to choose among, far too many for exhaustive consideration. There is a crucial, understudied prechoice step in which, among myriad possibilities, a few good candidates come quickly to mind. How do people accomplish this? We show across nine experiments (N = 3,972 U.S. residents) that people use computationally frugal cached value estimates to propose a few candidate actions on the basis of their success in past contexts (even when irrelevant for the current context). Deliberative planning is then deployed just within this set, allowing people to compute more accurate values on the basis of context-specific criteria. This hybrid architecture illuminates how typically valuable thoughts come quickly to mind during decision-making.

From the General Discussion

Salience effects, such as recency, frequency of consideration, and extremity, likely also contribute to consideration (Kahneman, 2003; Tversky & Kahneman, 1973). Our results supported at least one salience effect: In Studies 4 through 6, in addition to our primary effect of high cached value, options with more extreme cached values relative to the mean also tended to come to mind (see the checkmark shape in Fig. 3d). Salience effects such as this may have a functional basis, such as conserving scarce cognitive resources (Lieder et al., 2018). An ideal general theory would specify how these diverse factors—including many others, such as personality traits, social roles, and cultural norms (Smaldino & Richerson, 2012)—form a coherent, adaptive design for option generation.

A growing body of work suggests that value influences what comes to mind not only during decision-making but also in many other contexts, such as causal reasoning, moral judgment, and memory recall (Bear & Knobe, 2017; Braun et al., 2018; Hitchcock & Knobe, 2009; Mattar & Daw, 2018; Phillips et al., 2019). A key inquiry going forward will be the role of cached versus context-specific value estimation in these cases.