Regard and perceptions of size in soccer: better is bigger

Celebrated people often seem larger than life. In a series of experiments, and with observational data, we asked whether an association exists between regard for the action capabilities of soccer players and perceptual estimations of their size. Higher regard resulted in overestimations of size, and momentary modifications of apparent action capability resulted in overestimations or underestimations of size directly related to performance success or failure, respectively.     

Support and Nonsupport for Nationalist Rebellion: A Prospect Theory Approach

Prospect theory has been advanced as one way to link intentional rebellious action and the influence of social conditions on individual decisions to support such action. This study extends the application of prospect theory by explaining tendencies toward action or inaction among individuals within identical social contexts. Put simply, the way in which people define reference points has an effect on how they perceive violent options. These perceptions may invoke inaction biases among members of a constituent community. This explanation is explored with illustrative examples drawn from interviews with individuals who supported or did not support rebellious action in Northern Ireland (in 1998) and in the West Bank and Gaza Strip (in 1999). The interview data suggest that territorial demands are an important factor in how rebellious options are perceived.     

Experimental treatment of habitual smoking

Habitual cigarette smoking in 42 Ss was used as a model of problem behaviour to which 3 different therapies were applied by therapists. Two of the therapies were based on techniques associated with “behaviour therapy” while a third consisted of supportive counselling. The experiment was designed to test the effects of different therapists as well as different therapies. Amount of change in smoking behaviour was significantly related to therapists but unrelated to the particular therapy administered. Ss were significantly effective predictors of their own level of success. Relatively successful Ss tended to evaluate the therapists to whom they were assigned more negatively than did unsuccessful Ss.     

Influence of children's emotional states on the recognition of emotion in peers and social motives to change another's emotional state

This experiment addressed the question of whether children's own emotional states influence their accuracy in recognizing emotional states in peers and any motives they may have to intervene in order to change their peers' emotional states. Happiness, sadness, anger, or a neutral state were induced in preschool children, who then viewed slides of other 4-year-old children who were actually experiencing each of those states. Children's own emotional states influenced only their perception of sadness in peers. Sad emotional states promoted systematic inaccuracies in the perception of sadness, causing children to mislabel sadness in peers as anger. Children had high base rates for using the label “happy,” and this significantly enhanced their accuracy in recognizing that state. Low base rates for labeling others as in a neutral state reduced accuracy in recognizing neutrality. Children were generally motivated to change sad, angry, and neutral states in peers, and they were most motivated to change a peer's state if they were to be the agent of such change. The results are discussed in terms of the limited role of children's own emotional states in their recognition of emotion in others or motives to intervene and in terms of factors influencing the perception of emotion, such as base rate preferences for labeling others as experiencing, or not experiencing, particular emotional states.     

The essential process in a family of measurement models

Five members of the Rasch family of latent trait models which have appeared more or less independently in the literature are brought together and identified as one model. In addition to sharing the distinguishing characteristic of the dichotomous Rasch model—separable person and item parameters and hence sufficient statistics—all five models share a common algebraic form and have as their basic element the fundamental process defined by Rasch's simple logistic expression. In these models, the sufficient statistics for person and item parameters are counts of events constructed to be indicative of the variable being measured, and the measures they enable are ‘fundamental’.     

Intact Procedural Knowledge in Patients with Alzheimer's Disease: Evidence from Golf Putting

Can Alzheimer's disease (AD) patients efficiently learn to perform a complex motor skill when relying on procedural knowledge? To address this question, the authors compared the golf-putting performance of AD patients, older adults, and younger adults in 2 different learning situations: one that promotes high error rates (thus increasing the reliance on declarative knowledge) or one that promotes low error rates (thus increasing the reliance on procedural knowledge). Motor performance was poorer overall for AD patients and older adults relative to younger adults in the high-error condition but equivalent between similar groups in the low-error condition. Also, AD patients in the low-error condition had better performance at the final putting distance relative to those in the high-error condition. This performance facilitation for AD patients likely stems from intact procedural knowledge.     

Manipulation of thinness and restricting expectancies: further evidence for a causal role of thinness and restricting expectancies in the etiology of eating disorders.

To test the eating disorder expectancy theory contention that expectancies for reinforcement from thinness play a causal role in body dissatisfaction and eating disorder symptoms, the authors manipulated expectancies in 2 studies. Participants were exposed to either a psychoeducational intervention or an experimental manipulation of thinness and restricting expectancies. Study 1 participants were symptomatic college women who attended 3 experimental sessions and 1 follow-up session, each 1 week apart. Study 2 participants were high school girls who received the 3 experimental sessions clustered into 2 meetings; they completed symptom measures at baseline and at follow-up. In both samples, the thinness expectancy manipulation produced greater declines in thinness expectancies and body dissatisfaction than did the psychoeducational intervention. For high school girls, the thinness expectancy manipulation also produced a greater decline in overall eating-disordered attitudes. These results provide further support for the role of expectancies in the etiology of eating-disordered behaviors.     

The implicit benefit of learning without errors

Two studies examined whether the number of errors made in learning a motor skill, golf putting, differentially influences the adoption of a selective (explicit) or unselective (implicit) learning mode. Errorful learners were expected to adopt an explicit, hypothesis-testing strategy to correct errors during learning, thereby accruing a pool of verbalizable rules and exhibiting performance breakdown under dual-task conditions, characteristic of a selective mode of learning. Reducing errors during learning was predicted to minimize the involvement of explicit hypothesis testing leading to the adoption of an unselective mode of learning, distinguished by few verbalizable rules and robust performance under secondary task loading. Both studies supported these predictions. The golf putting performance of errorless learners in both studies was unaffected by the imposition of a secondary task load, whereas the performance of errorful learners deteriorated. Reducing errors during learning limited the number of error-correcting hypotheses tested by the learner, thereby reducing the contribution of explicit processing to skill acquisition. It was concluded that the reduction of errors during learning encourages the use of implicit, unselective learning processes, which confer insusceptibility to performance breakdown under distraction.