Do infants apply the principle of rational action to human agents?

Twelve- to fourteen-month-old infants’ reactions to violations of the principle of rational action [Cognition 56 (1995) 165] were studied in two experiments, using humanlike puppets and human agents rather than computerized shapes as stimuli. In Experiment 1, infants watched a puppet approaching another puppet on a stage, while in Experiment 2 a videotaped sequence of a person approaching another person was shown. In both experiments, a rational and a non-rational approach condition were contrasted in the habituation phase. In the rational approach condition, an obstacle had to be overcome by climbing or jumping. In the non-rational approach condition, the agent made a detour approach in the absence of an obstacle. In the test phase, infants watched direct and indirect-approach events. In both experiments, infants in the rational approach condition looked significantly longer at indirect-approach than at direct-approach test events, while no difference between the two types of test events was observed in the non-rational approach condition. These findings support the assumption that one-year-old infants have principled expectations about rational goal approaches of human agents.     

Does hand dominance affect the use of motor abundance when reaching to uncertain targets?

This study investigated hemispheric differences in utilizing motor abundance to achieve flexible patterns of joint coordination when reaching to uncertain target locations. Right-handed participants reached with each arm to the same central target when its final location was certain or when there was a 66% probability that its location could change after movement initiation. Use of greater motor abundance was observed when participants reached to the central target under target location uncertainty regardless of the arm used to reach. Joint variance associated with variability of movement direction was larger when reaching with the left, non-dominant arm. This arm also exhibited higher hand path variability compared to the dominant arm. These arm differences were not found when the final (central) target location was known in advance. The results provide preliminary evidence for a greater ability of the dominant (right) arm/left hemisphere to decouple directions in joint space. That is, to increase the use of motor abundance without simultaneously inducing unwanted hand path variability requires that joint variations be restricted to a limited subspace of joint space. Hemispheric differences in motor planning did not appear to account for arm differences related to the use of motor abundance.     

Does ignoring lead to worse evaluations? A new explanation of the stimulus devaluation effect

Affective evaluation of stimuli just seen in visual search tasks has been shown to depend on task-relevant stimulus configuration (Raymond, Fenske, & Tavassoli, 2003): Whereas targets and novel stimuli were evaluated similarly, distractors were devaluated. These results were explained by an inhibition-based account of the influence of selective attention on emotion. In the present experiments, we demonstrated that stimulus devaluation might not be a consequence of attentional inhibition. By simply instructing participants to react to an accepted or rejected stimulus in the visual search task of Experiment 1, we found distractor devaluation in the first case and target devaluation in the second case. We conclude that devaluation of stimuli is mediated by the affective connotation implied by response labels and instructions. This was confirmed in Experiment 2: To-be-ignored stimuli were not devaluated when participants knew that those stimuli would become task-relevant during the experiment.     

The role of affect in the decision to exercise: Does being happy lead to a more active lifestyle?

ObjectiveThis study investigated the influence of affect on individuals' intentions to engage in physical activities such as exercise. Behavior intentions were examined through the Theory of Planned Behavior (TPB).MethodAn experimental survey was conducted among 153 undergraduates randomly assigned to three conditions – positive affect, neutral, and negative affect. Key variables from the TPB were assessed across these conditions.ResultsAnalyses showed that participants in the positive affect and the negative affect conditions reported lower intentions to exercise than those in the neutral condition. Participants in the negative affect condition also reported more unfavorable attitudes toward exercise than their positive or neutral counterparts. Other TPB measures remained stable across the three conditions. In particular, perceived behavioral control and attitude were significant predictors of behavior intention in the pooled sample.ConclusionThese results underline the important role that affect, especially negative affect, plays in individuals' decision to exercise. Rational models for health behavior change, such as the TPB, should take into account the impact of affect.     

Sex differences in scanning faces: Does attention to the eyes explain female superiority in facial expression recognition?

Previous meta-analyses support a female advantage in decoding non-verbal emotion (Hall, 1978, 1984), yet the mechanisms underlying this advantage are not understood. The present study examined whether the female advantage is related to greater female attention to the eyes. Eye-tracking techniques were used to measure attention to the eyes in 19 males and 20 females during a facial expression recognition task. Women were faster and more accurate in their expression recognition compared with men, and women looked more at the eyes than men. Positive relationships were observed between dwell time and number of fixations to the eyes and both accuracy of facial expression recognition and speed of facial expression recognition. These results support the hypothesis that the female advantage in facial expression recognition is related to greater female attention to the eyes.     

Does bullying others at school lead to adult aggression? The roles of drinking and university participation during the transition to adulthood

This study uses a three‐wave longitudinal study of young Australians to identify developmental processes underlying the relationship between school bullying and physical aggression in early adulthood. The central question is whether and how drinking and participation in work or university study disrupt or entrench aggressive pathways from school bullying to adult aggression. Self‐report data were collected from 88 females and 63 males (N = 151) during childhood (age 10), adolescence (age 14), and early adulthood (age 20). Participants who bullied other students during childhood and adolescence, or during adolescence only, reported more physical aggression during early adulthood than those who never bullied. However, those who had bullied during adolescence only reported significantly higher adult aggression if they were also drinking at above‐average frequencies. Conversely, participation in university, compared to being in the workforce, was associated with significantly less adult aggression among the at‐risk groups. Findings suggest that particular contexts during early adulthood can offer youth on aggressive trajectories (as evidenced by bullying at school) unique opportunities to turn their behaviour around. Other contexts, however, may exacerbate aggressive behaviour patterns.     

British research productivity in psychology 1980–1989. Does the Lotka-Price law apply to university departments as it does to individuals?

This study replicated two American studies which set out to look at research productivity in British (university and polytechnic) psychology departments based on publication in the seven BPS journals over the last decade. Composite productivity scores were calculated, rank-ordered, and compared with previous reputational ratings. The correlation between the productivity score and Rushton's [(1989) The Psychologist, 2, 64–68] citation score was r=0.79 and his publication score was r=0.77. Despite the fact that quite different methods have been used to rate or rank departmental excellence or output, they seem to show highly significant correlations. The effect of highly productive individuals within departments was considered. The dangers and limitations inherent in this particular productivity count are listed. The results seemed to suggest that the Lotka-Price law of scientific productivity partly applied to departments in that half of all scientific contributions are made by (slightly more than) the square root of the total number of scientific contributors (in this sense psychology departments).     

Does alcohol loosen the tongue? Intoxicated individuals' willingness to report transgressions or criminal behavior carried out by themselves or others

Police commonly interview intoxicated suspects. This is concerning when suspects are innocent because intoxication often leads to a higher risk for impulsive decision making and reduces inhibition. However, the manner in which intoxication affects people's reporting of unethical or criminal actions carried out by themselves or others is unknown and was thus addressed in the current study. Participants (N = 116) were randomly assigned to one of six conditions based on a 2 (transgression: self, other) × 3 (alcohol condition: low‐to‐moderate intoxication, placebo, sober‐control) between‐participants design. After drinking their assigned beverages, participants were asked to disclose a transgression. No main effect of alcohol emerged. However, the odds that participants would report a transgression were significantly higher if they were asked to report a personal, rather than someone else's, transgression. Overall, low‐to‐moderate intoxication did not increase the likelihood of sensitive information disclosure in this initial study, but additional research is needed.     

Does a customer by any other name tip the same?: The effect of forms of address and customers' age on gratuities given to food servers in the United States

This study examined whether different forms of address used by food servers were related to customers' tipping behavior. Food servers addressed diners who paid with credit cards by their first names, titles plus last names, sir/ma'am, or no address. Results indicated that when food servers personalized their service by addressing their customers by name, they earned significantly higher tips than when they used less immediate forms of address, although customers' estimated age mediated these results.