Psychological Science最新文献

Using a DNA-based polygenic index, we explored geographical and historical differences in polygenic associations with educational attainment in East and West Germany around the time of reunification. This index was derived from a prior genome-wide association study on educational attainment in democratic countries. In 1,930 individuals aged 25 to 85 years from the SOEP-G[ene] cohort, the magnitude of polygenic associations with educational attainment did not differ between East and West Germany before reunification but increased in East Germany thereafter. This gene-environment interaction remained robust when we probed for variance dispersion. A control analysis using a polygenic index of height suggests that this interaction is unlikely to reflect a general trend toward greater genetic associations in East Germany after reunification. The observed amplification of education-genetic associations aligns with theories suggesting heightened genetic influences on educational attainment during periods of greater social and educational opportunity. We emphasize the need for replication in larger German genetic data sets.

Adults selectively avoid useful information. We examined the development of information avoidance in 5- to 10-year-old American children (N = 320). In Experiment 1, children considered scenarios that might elicit information avoidance: protecting against negative emotions, maintaining perceptions of likeability and competence, preserving beliefs and preferences, and acting in self-interest. When a motivation for avoidance was present, children were more likely to avoid learning information, particularly with age. Experiment 2 presented the self-interest scenario (a moral "wiggle room" task) involving real payoffs. Although children could reveal their partner's payoff without cost, older children capitalized on moral "wiggle room" by avoiding this information and choosing the self-interested payoff. In Experiment 3, we considered conditions under which even young children might avoid information, finding that they too avoided information when explicitly encouraged to protect their emotions. Additional qualitative findings probed children's open-ended responses about why people seek and avoid information. Together, these experiments document the origins of information avoidance.

Most mind-wandering paradigms use self-reports following task performance, but the extent to which these reports are confounded by performance cues is unknown. In two experiments with adult human participants, we examined whether self-reports and confidence therein are influenced by performance indicators during visual metronome response tasks. In Experiment 1 (N = 40), sham feedback modulated reports independently of behavioral performance with participants more likely to report mind wandering after incorrect than correct sham feedback. In Experiment 2 (N = 111), we replicated this pattern using a more implicit manipulation of perceived performance-a surreptitious delay in the onset of response targets. Participants were more likely to report mind wandering after this delay than they were in control trials. In both experiments, confidence in on-task reports was lower when the corresponding indicator (falsely) implied poor performance. These findings suggest that mind-wandering reports and experiential state confidence are partly confounded by performance monitoring and have implications for experience-sampling methodologies.

Biased media content shapes children's social concepts and identities. We examined gender bias in a large corpus of scripts from 98 children's television programs from the United States spanning the years 1960 to 2018 (6,600 episodes, ~2.7 million sentences, ~16 million words). We focused on agency and communion, the fundamental psychological dimensions underlying gender stereotypes. At the syntactic level, words referring to men or boys (vs. women or girls) appear more often in the agent (vs. patient) role. This syntactic bias remained stable between 1960 and 2018. At the semantic level, words referring to men or boys (vs. women or girls) co-occurred more often with words denoting agency. Words denoting communion showed both stereotypical and counterstereotypical associations. Some semantic gender biases have remained unchanged or have weakened over time; others have grown. These findings suggest that gender stereotypes are built into the core of children's stories. Whether we are closer today to gender equality in children's media depends on where one looks.

The positive relation between mental health and educational attainment is well established, yet the extent to which cognitive abilities influence this gradient or independently predict mental health outcomes remains unclear. In this study, we investigated the association between adolescent cognitive abilities, educational attainment, and adult mental health. Cognitive ability was ascertained in Norwegian military conscript test data (N = 272,351; mean age 17.8 years; males only), whereas mental disorders were ascertained using the Norwegian register of primary care diagnoses received between the age of 36-40. Higher cognitive abilities were associated with a monotonically decreasing risk of developing all the studied mental disorders except bipolar disorder. The association held even when comparing the cognitive abilities of brothers raised in the same family, attesting that cognitive ability and mental disorders are not associated because both arise from the same family background circumstances. Similarly, individuals with higher educational attainment had fewer mental health disorders. The association between low cognitive abilities and the risk of mental disorders was notably stronger in males with low educational attainment, compared to those with high educational attainment. These individuals may be an underutilized target group for mental-disorder prevention.

A powerful cue when reasoning is whether an apparent consensus has been reached. However, we do not yet know how the strength of this cue varies between different individuals and types of claims. In the current study (N = 78 U.S. adults, recruited from Prolific), we evaluated this with a realistic mock social-media paradigm in which each participant evaluated 60 diverse, real-world claims based on posts from people who either disagreed with each other, formed a consensus independently, or formed a consensus using shared sources. Almost all participants revised their beliefs to align with the consensus; many also qualitatively changed their minds. A consensus was also more persuasive for claims more likely to have a ground truth (i.e., more knowable claims). Although most people were insensitive to consensus independence, some were more persuaded by a consensus formed independently, whereas some were equally convinced by a consensus formed using the same sources.

Resource constraints in neural information processing imply that numerical discriminability optimally adapts to the frequency of numerical magnitudes in a decision maker's environment. Here, we tested the economic consequences of efficient numerical range adaptation in representative samples of the United Kingdom and Japan (N = 2,309) and in a replication in Austria and Hungary (N = 607). We exploited natural variation in currency units and combined it with an orthogonal variation in experimental currency units to detect the effect of habitual versus nonhabitual numerical ranges on the incidence of errors in decisions under risk. The results highlight the direct economic importance of numerical adaptation, thus calling into question standard assumptions that choice quantities are perceived without noise.

Languages tend to describe "who is doing what to whom" by placing subjects before objects. This may reflect a bias for agents in event cognition: Agents capture more attention than patients in human adults and infants. We investigated whether this agent preference is shared with nonhuman animals. We presented Guinea baboons (Papio papio; N = 13) with a change-detection paradigm on chasing animations. The baboons were trained to respond to a color change that was applied to either the chaser/agent or the chasee/patient. They were faster to detect a change to the chaser than to the chasee, which could not be explained by low-level features in our stimuli such as the chaser's motion pattern or position. An agent preference may be an evolutionarily old mechanism that is shared between humans and other primates that could have become externalized in language as a tendency to place the subject first.

Humans rely on more knowledgeable individuals to acquire information. But when we are ignorant, how are we to tell who is knowledgeable? We propose that human knowledge is nested: People who know only a few things tend to know very common pieces of information, whereas rare pieces of information are known only by people who know many things, including common things. This leads to the possibility of reliably inferring knowledgeability from minimal cues. In this study (N = 848 U.S. adults recruited online), we show that individuals can accurately gauge others' knowledgeability on the basis of very limited information, relying on their ability to estimate the rarity of different pieces of knowledge and on the fact that knowing a rare piece of information indicates a high likelihood of knowing more information in the same theme. Even participants who are largely ignorant of a theme can infer how knowledgeable other individuals are on the basis of the possession of a single piece of knowledge.

The gambler's fallacy is typically defined as the false belief that a random event is less likely to occur if it has occurred recently. Although forms of this fallacy have been documented numerous times, past work either has not actually measured probabilistic predictions but rather point predictions or used sequences that were not independent. To address these problems, we conducted a series of high-powered, preregistered studies in which we asked 750 adult Amazon Mechanical Turk workers from the United States to report probabilistic predictions for truly independent sequences. In contrast to point predictions, which generated a significant gambler's fallacy, probabilistic predictions were not found to lead to a gambler's fallacy. Moreover, the point predictions could not be reconstructed by sampling from the probability judgments. This suggests that the gambler's fallacy originates at the decision stage rather than in probabilistic reasoning, as posited by several leading theories. New theories of the gambler's fallacy may be needed to explain these findings.