Same items, different order: effects of temporal variability on infant categorization

How does variability between members of a category influence infants’ category learning? We explore the impact of the order in which different items are sampled on category formation. Two groups of 10-months-olds were presented with a series of exemplars to be organized into a single category. In a low distance group, the order of presentation minimized the perceptual distance between consecutive exemplars. In a high distance group, the order of presentation maximized the distance between successive exemplars. At test, only infants in the High Distance condition reliably discriminated between the category prototype and an atypical exemplar. Hence, the order in which infants learnt about the exemplars impacted their categorization performance. Our findings demonstrate the importance of moment-to-moment variations in similarity during infants’ category learning.     

Neuropsychological impairment in Parkinson's disease without dementia

Cognitive dysfunction in Parkinson's Disease (PD) has been consistently reported, but little is known about cognitive impairment in PD patients without dementia, and its association with clinical characteristics, neuropsychiatric disturbance and functional activities. Therefore, we evaluated 52 non-demented PD patients, 22 of them with mild cognitive impairment (PD-MCI) who were matched with 52 healthy controls. Our results confirm the existence of dysfunction in information processing speed, executive function, verbal memory and visuo-perceptual processing in PD. On the other hand, PD-MCI was associated with advanced age at the onset of PD, more neuropsychiatric symptoms, caregiver stress and functional problems. The study supports the hypothesis that specific neuropsychological impairments may act as modulators of functional impairment in PD, for instance slowness of information processing.     

Use of multimodal imagery with precompetitive anxiety and stress of elite tennis players

The effect of multimodal imagery on anxiety and perceived stress was investigated in 46 male tennis players (16 to 18 yr.; M = 17.0, SD = 0.8). There were two groups, a multimodal imagery group and a control imagery group. The quasi-experimental design included pre- and post-treatment administrations of the 27-item Competitive State Anxiety Inventory to assess anxiety and the Perceived Stress Scale to assess stress. Analysis showed a statistically significant multivariate difference between the multimodal imagery and control groups on measures of cognitive anxiety, self-confidence, and perceived stress. Imagery plays a role in handling some specific types of anxiety and stress.     

Four days later in Cincinnati: longitudinal tests of hyperbolic discounting

Hyperbolic discounting of delayed rewards has been proposed as an underlying cause of the failure to stick to plans to forego one's immediate desires, such as the plan to diet, wake up early, or quit taking heroin. We conducted two tests of inconsistent planning in which respondents made at least two choices between a smaller-sooner (SS) and larger-later (LL) amount of money, one several weeks before SS would be received, and one immediately before. Hyperbolic discounting predicts that there would be more choices of SS as it became more proximate-and, equivalently, that among those who change their mind, "impatient shifts" (LL-to-SS) will be more common than "patient shifts" (SS-to-LL). We find no evidence for this, however, and in our studies shifts in both directions were equally likely. We propose that some of the evidence cited on behalf of hyperbolic discounting can be attributed to qualitatively different psychological mechanisms.     

Self-stereotyping: the central role of an ingroup threatening identity

Self-stereotyping is a process by which people belonging to a stigmatized social group tend to describe themselves more with stereotypical traits as compared with traits irrelevant to the ingroup stereotype. The present work analyzes why especially members of low-status groups are more inclined to self-stereotype compared to members of high-status groups. We tested the hypothesis that belonging to a low-, rather than a high-status group, makes low-status members feel more threatened and motivates them to protect their self-perception by increasing their similarity with the ingroup. Specifically, we investigated the effects of an experimental manipulation that was conceived to either threaten or protect the natural group membership of participants from either a low- or a high-status group on the level of self-stereotyping. The findings supported the idea that only low-status group members protected themselves when their group identity was threatened through increased self-stereotyping.     

Sexual Double Standard: A Review of the Literature Between 2001 and 2010

The present article is a review of 26 studies on the sexual double standard. This phenomenon consists of different rules and standards of sexual behavior for men and women. Only scientific articles reporting empirical research published between 2001 and 2010 and available online in full were included. Our review was focused on the evidence of the existence of the sexual double standard and on the methods that have been used in the studies in this field. Most studies used quantitative methods based on scales or vignette tasks with a target to be evaluated by respondents. There was greater variability of results among the 6 studies using qualitative methods. These studies employed different interview techniques, focus groups and participant observation. There were also 2 studies reporting the use of mixed methods. The results of the studies showed that the sexual double standard still can be identified nowadays, although it seems that sexual behaviors and situations influenced by this phenomenon are changing. Today, premarital sex and sexual intercourse outside of committed relationships are more accepted for both genders. However, evaluations of other facets of sexuality continue to be based on different criteria for men and women.     

Introducción a la Psicología Diferencial Cognoscitiva

Resumen

En este artículo se propone un cuerpo de conocimientos que hipotetizamos debería reunir la Psicología Diferencial Cognoscitiva. Esta propuesta tiene en consideración la relación entre los diversos enfoques de la Psicología Diferencial, tanto clásicos como más actuales, y la Psicología General, de acuerdo a tres metaniveles de teorización. Básicamente, la tesis mantenida en este artículo es que la psicología debería tender a elaborar modelos ajustados a las diferencias individuales en las actividades cognoscitivas tradicionalmente estudiadas por la psicología cognitiva, sea general o diferencial, y no tanto a buscar modelos canónicos referidos a dichas actividades.