Birds of a feather and birds flocking together: physical versus behavioral cues may lead to trait- versus goal-based group perception

Entitativity perception refers to the perception of a collection of individuals as a group. The authors propose 2 perceptual-inferential bases of entitativity perception. First, perceivers would expect a collection of individuals with similar physical traits to possess common psychological traits. Second, perceivers watching a group of individuals engage in concerted behavior would infer that these individuals have common goals. Thus, both similarity in physical traits (e.g., same skin color) and concerted collective behavior (e.g., same movement) would evoke perception of group entitativity. Results from 5 experiments show that same group movement invariably leads to common goal inferences, increased perceived cohesiveness, and increased perceived entitativity. Moreover, same skin color evokes inferences of group traits and increases perceived homogeneity and perceived entitativity but only when skin color is diagnostic of group membership.     

The stigma of obesity in customer service: a mechanism for remediation and bottom-line consequences of interpersonal discrimination

Using a customer service paradigm, the authors extended the justification-suppression model (JSM) of prejudice (C. S. Crandall & A. Eshleman, 2003) to include contemporary, covert forms of discrimination and to identify a discrimination remediation mechanism. Overall, the results of 3 studies revealed that actual and confederate obese shoppers in high-prejudice justification conditions faced more interpersonal discrimination than average-weight shoppers. Furthermore, Studies 1 and 2 demonstrate that adopting strategies that remove perceivers' justifications for discriminating against obese individuals (i.e., the controllability of weight) decreases the incidence of interpersonal discrimination. Additionally, Study 3 demonstrates negative bottom-line consequences of interpersonal discrimination for organizations (e.g., customer loyalty, purchasing behavior). Together, these studies confirm that the JSM applies to covert forms of discrimination, show the importance of examining subtle discrimination, and offer a mechanism for theory-driven strategies for the reduction of covert forms of discrimination.     

The relative influence of attitudes and subjective norms from childhood to adolescence: between-participant and within-participant analyses

Children and adolescents (ages 8-16) were asked to indicate their behavioral intentions, attitudes, and subjective norms for 34 behaviors. Between-participant and within-participant analyses demonstrated that attitudes and subjective norms were good predictors of behavioral intentions both singly and in combination. In addition, attitudes generally were better predictors than were subjective norms both across behaviors and across participants. Most importantly, however, there were no differences in the relative importance of attitudes and subjective norms in predicting behavioral intentions across age groups.     

Preference and resistance to change with constant- and variable-duration terminal links: independence of reinforcement rate and magnitude

Pigeons responded in a three-component multiple concurrent-chains procedure in which the variable-interval reinforcement schedules were the same across components but magnitudes differed across components. The terminal links were arranged either as a variable delay followed by presentation of a reinforcer ("variable duration") or as a fixed period of access to the schedule during which a variable number of reinforcers could be earned ("constant duration"). Relative reinforcement rate was varied parametrically across both types of conditions. After baseline training in each condition, resistance to change of terminal-link responding was assessed by delivering food during the initial links according to a variable-time schedule. Both preference and resistance to change were more sensitive to reinforcement-rate differences in the constant-duration conditions. Sensitivities of preference and resistance to change to relative reinforcement rate did not change depending on relative reinforcement magnitude. Taken together, these results confirm and extend those of prior studies, and suggest that reinforcement rate and magnitude combine additively to determine preference and resistance to change. A single structural relation linking preference and resistance to change describes all the data from this and several related studies.     

Models of causation and the semantics of causal verbs

This research examines the relationship between the concept of CAUSE as it is characterized in psychological models of causation and the meaning of causal verbs, such as the verb cause itself. According to focal set models of causation (; ), the concept of CAUSE should be more similar to the concepts of ENABLE and PREVENT than either is to each other. According to a model based on theory of force dynamics, the force dynamic model, the concepts of CAUSE, ENABLE, and PREVENT should be roughly equally similar to one another. The relationship between these predictions and the meaning of causal verbs was examined by having participants sort causal verbs and rate them with respect to the dimensions specified by the two models. The results from five experiments indicated that the force dynamic model provides a better account of the meaning of causal verbs than do focal set models of causation. Implications for causal inference and induction are discussed.     

Rapid acquisition of preference in concurrent chains

We report two experiments using a concurrent-chains procedure in which one terminal-link schedule was fixed-interval 8 s and the alternative schedule changed randomly from day to day. In Experiment 1, the alternative schedule varied between 4 s and 16 s according to a pseudorandom binary sequence similar to the one used by Hunter and Davison (1985). Similar to results with concurrent schedules, pigeons' response allocation in the initial link was most sensitive to the schedules arranged in the current session, although some effect of prior history was evident. Overall sensitivity was lower than for comparable data from steady-state research. In Experiment 2, a unique value between 2 s and 32 s was used for the alternative-schedule delay in each session. Sensitivity levels were similar to Experiment 1 and remained unchanged across 61 sessions of training. For all subjects, sensitivity was greater when the alternative-schedule delay was greater than 8 s compared with when it was less than 8 s. Generalized-matching plots revealed evidence of clustering of data points into two groups for some pigeons, suggesting that a process similar to a categorical discrimination may have at least partly determined response allocation. Overall, this research shows that pigeons' initial-link response allocation can adjust rapidly to frequent changes in the terminal links.     

The relationship between value and temporal context is an empirical question: a reply to Fantino (2000)

E. Fantino (2000) argued that R. C. Grace and H. I. Savastano's (2000) experiments fail to elucidate the relationship between stimulus value and temporal context. His reasoning is that predictions for R. C. Grace and H. I. Savastano's probe tests based on delay-reduction theory (DRT) and the contextual choice model (CCM) are indistinguishable. However, his method of applying DRT to the probes ensures that temporal context will have no effect on which stimulus is preferred, contrary to the core principle of that theory. The only basis for differential responding in the probes is baseline training, and R. C. Grace and H. I. Savastano's data clearly show that the terminal-link schedules, independent of temporal context, control choice in the probes, as predicted by CCM.     

Remedial self-fulfilling prophecy: two field experiments to prevent Golem effects among disadvantaged women

The Pygmalion effect is a self-fulfilling prophecy (SFP) in which raising leader expectations boosts subordinate performance. Although attempts to produce Pygmalion effects have been successful repeatedly among men, attempts to produce Pygmalion effects with female leaders have yielded null results. Also, only 1 experiment has demonstrated the Golem effect (i.e., negative SFP in which low leader expectations impair subordinate performance). In 2 field experiments testing the SFP hypothesis among women leading disadvantaged women, experimental leaders were led to believe that their trainees had higher than usual potential. In reality, the trainees had been assigned randomly. Manipulation checks confirmed that the treatment raised leader expectations toward experimental trainees. Analysis of variance of performance detected the predicted SFP effects in both experiments. These were the first-ever experimental confirmations of SFP among women as leaders.     

The socio-conditions of the white practitioner: New perspectives

The writer is a white educator in a graduate school of social work. Her prior clinical work included ego psychological theory building and demonstration research with severely emotionally disturbed children and their families. This paper presents her views of the institutionalized character of racism, myths about whiteness and knowledge which has bearing on the resolution of the human relationship arrangements which underlie the white clinician's dilemma.—Ed.     

Prior categorization can produce more efficient ordering

We hypothesized that prior categorization of an attribute might sometimes facilitate the ordering of stimuli, particularly when the number of stimuli is relatively large or some of them need to be remembered. In four experiments, participants were required to rank order either numbers or line lengths either using a selection sort or following prior categorization. The results indicated that prior categorization produced faster sorting when the number of stimuli to be ordered was relatively large and when the stimuli were not continuously visible.