Stereotypes as Pseudocontingencies

We introduce a heuristic called pseudocontingencies (PCs) as an alternative account of various stereotyping phenomena. PCs give rise to the expectation that attributes are correlated based solely on asymmetries in attribute base rates. Attributes that are encountered frequently and attributes that are encountered rarely are perceived to be correlated with each other. Such differences in information densities are typical of many stereotyped targets, including the self vs. others, the in-group vs. out-groups and majority vs. minority groups. Evidence is reviewed for PCs underlying illusory correlations, confirmation biases, gender stereotypes, Simpson’s paradox, and in procedures used for implicit stereotype measurement. PCs are shown to predict specific patterns of self-enhancement and self-depreciation, the effects of intergroup contact on in-group biases and the readiness to infer stereotypes from aggregated “big-data”. Although PCs can lead to seriously flawed stereotypic expectations, they afford an efficient and possibly adaptive inference strategy.     

Pseudocontingencies in a simulated classroom

The pseudocontingency (PC) illusion is investigated in a simulated classroom setting. Related to the notion of ecological correlations, PCs arise when the assessment of contingencies at the individual level is affected by the base-rate relations at the group level. Positive PCs arise when base rates of 2 variables are skewed in the same direction (e.g., high ability and high motivation), whereas negative PCs arise when base rates are skewed in opposite directions. Experiment 1 demonstrates that PCs between student ability and motivation are contingent on effective base-rate assessment at the group level, with a bias toward positive PCs reflecting prior expectancies. Ruling out prior expectancies, Experiment 2 yields symmetric positive and negative PCs. Experiment 3 provides evidence for PC effects on gender stereotypes. Finally, Experiment 4 extends PCs from group base rates to individual student base rates, ruling out an explanation in terms of capacity deficits or inability to assess individuating information.     

Mood and judgments based on sequential sampling

Different adaptive styles characterize cognition and behavior in different affective states. Whereas negative affect supports accommodation (i.e., stimulus‐driven bottom‐up processing), positive affect supports assimilation (i.e., self‐determined top‐down processing). Applying this well‐established rule to binary choices after self‐truncated information sampling, we predicted that positive mood should render choices less dependent on large samples than negative mood. Consequently, the potential primacy advantage underlying Wald's ( 1947 ) sequential testing (i.e., quick and correct decisions from the first few items in a sample) was exploited more efficiently when participants were in positive rather than negative mood. This efficient utilization of small samples in positive mood was obtained under the very conditions derived on a priori ground from a statistical model, namely, when a response criterion or threshold was high and when the true difference between choice options was relatively small. Copyright © 2009 John Wiley & Sons, Ltd.     

Discovering New Ways of Moving: Observational Analysis of Motor Creativity While Dancing Contact Improvisation and the Influence of the Partner

Contact improvisation (CI) is a form of dance based on motor creativity, improvisation and the physical contact between different improvisers dancing together. This will generate different ways of moving and a varied use of motor creativity depending on the dancers involved. This study aims to observe the differences in movement generation depending on the partner by using OSMOS (Observational System of Motor Skills; Castañer & Camerino 2006; Castañer et al., 2009). Four contact improvisers were video‐recorded while dancing in duets. Data were analysed by three observers using Theme Coder software (Magnusson, 1996) for the detection of T‐patterns and the production of event frequency charts. The results show that (1) the motor skills that appear most frequently are the conduction of partners, elevations, spatial level changes and turns; (2) motor creativity is affected by the partner, as there is a reciprocal influence in the dance; and (3) motor creativity is enhanced by interaction with a partner.     

Cognitive Resources and Leadership Performance

Le rôle et la fonction des ressources cognitives que sont les aptitudes intellectuelles, l'expérience et les connaissances spécialisées ont longtemps été une énigme tacitement ignorée dans la théorie du leadership. En pratique, tout protocole de sélection ou de promotion d'un manager ou d'un leader évalue soigneusement les aptitudes intellectuelles du candidat, ses connaissances et son expérience professionnelle. Pourtant, rien de tout cela n'est en forte corrélation, voire tout simplement en corrélation, avec les performances de leader. Cet article, qui s'appuie sur la théorie des ressources cognitives (CRT), fait la synthèse aussi bien des recherches récentes que de nouveaux travaux qui éclairent le rôle des ressources cognitives dans le phénomène de leadership, et en tire des indications permettant d'améliorer les performances des leaders.
The role and function of such cognitive resources as intellectual abilities, experience, and expertise, have presented a long-standing but tacitly ignored enigma in leadership theory. Practically all managerial and leadership selection and promotion processes carefully weigh the leader's intellectual abilities, expertise, and job-related experience. However, none of these correlates highly, if at all, with leadership performance. This paper, based on Cognitive Resource Theory (CRT), summarises recent research, as well as new findings, that clarifies the role of cognitive resources in the leadership process, and spells out implications for more effective leadership performance.     

Why Dexamethasone Poorly Penetrates in Brain

Dexamethasone poorly penetrates in brain. A tracer amount of [3H]-dexamethasone administered to adrenalectomized rats or mice is poorly retained by glucocorticoid receptors in brain, while pituitary corticotrophs containing equivalent amounts of these receptors accumulate and retain large amounts of this synthetic steroid. However, adrenalectomized mice with a genetic disruption of the multiple drug resistance (mrd1a) gene have a tenfold increase of [3H]-dexamethasone uptake in brain glucocorticoid target sites reaching levels observed in the pituitary. These data demonstrate that dexamethasone is extruded from brain by the mrd1a-encoded P-glycoproteins. The data support the concept of a pituitary site of action of dexamethasone in blockade of stress-induced ACTH release, which implies that chronic dexamethasone treatment does not replace the endogenous corticosteroids depleted from brain mineralocorticoid (MRs) and glucocorticoid receptors (GRs). Dexamethasone, therefore, causes a profound disturbance in the balance of these two receptor types in hippocampus, which is an unfavourable condition threatening the neuronal integrity of this brain structure through the expression of noxious genes.     

The Regression Trap and Other Pitfalls of Replication Science—Illustrated by the Report of the Open Science Collaboration

The Open Science Collaboration’s 2015 Open Science Collaboration. (2015). Estimating the reproducibility of psychological science. Science, 349, aac4716. doi:10.1126/science.aac4716[Crossref], [PubMed], [Web of Science ®] , [Google Scholar] report suggests that replication effect sizes in psychology are modest. However, closer inspection reveals serious problems. When plotting replication effects are against original effects, the regression trap is lurking: Expecting replication effects to be equally strong as original effects is logically unwarranted; they are inevitably subject to regressive shrinkage. To control for regression, the reliability of original and replication studies must be taken into account. Further problems arise from missing manipulation checks and sampling biases. Our critical comment highlights the need for replication science to live up to the same methodological scrutiny as other research.     

Anomalies in the detection of change: When changes in sample size are mistaken for changes in proportions

Detecting changes, in performance, sales, markets, risks, social relations, or public opinions, constitutes an important adaptive function. In a sequential paradigm devised to investigate detection of change, every trial provides a sample of binary outcomes (e.g., correct vs. incorrect student responses). Participants have to decide whether the proportion of a focal feature (e.g., correct responses) in the population from which the sample is drawn has decreased, remained constant, or increased. Strong and persistent anomalies in change detection arise when changes in proportional quantities vary orthogonally to changes in absolute sample size. Proportional increases are readily detected and nonchanges are erroneously perceived as increases when absolute sample size increases. Conversely, decreasing sample size facilitates the correct detection of proportional decreases and the erroneous perception of nonchanges as decreases. These anomalies are however confined to experienced samples of elementary raw events from which proportions have to be inferred inductively. They disappear when sample proportions are described as percentages in a normalized probability format. To explain these challenging findings, it is essential to understand the inductive-learning constraints imposed on decisions from experience.     

Mood and memory for tightly organized social information

The frequently cited finding that mood-congruent information can be better recalled than mood-incongruent information is tested using categorically organized stimulus material which imposes a systematic structure on the recall process. A target person was described with respect to six categories of social behaviour, with predominantly desirable behaviours in some categories and predominantly undesirable behaviours in others. Participants were induced either an elated mood state or a neutral state using Velten's procedure. Instructions (impression formation versus memory) were also manipulated. Although the mood manipulation apparently worked and did influence the impression judgments of the target person, it did not selectively facilitate the recall of mood-congruent material, neither at the level of specific items nor at the categorical level. However, when only deviating behaviours are considered which do not fit the structural constraints, mood-congruent information is indeed better recalled. To interpret these results, it is argued that the manifestation of mood effects depends on the restrictions of different tasks or response modes. Three other findings were obtained: Superior recall of redundant, structurally consistent information compared with deviating information; an advantage of positive over negative information which is confined to the impression formation condition; and, surprisingly, an incongruency effect for the encoding mood which may reflect the deeper processing of incongruent material.