Amygdala or hippocampus inactivation after retrieval induces temporary memory deficit

The hypothesis that memory is stored through a single stage of consolidation that results in a stable and lasting long-term memory has been challenged by the proposition that reactivation of a memory induces reconsolidation of the memory. The reconsolidation hypothesis is supported by evidence that, under some conditions, post-retrieval treatments affecting amygdala and hippocampus functioning impair subsequent retention performance. We now report that repeated retention testing attenuates the performance impairment induced by post-retrieval reversible inactivation of the amygdala and hippocampus of rats induced by tetrodotoxin. These findings challenge the reconsolidation hypothesis and suggest that the post-retrieval retention performance impairment is best explained as due to temporary retrieval failure.     

Capsaicin-sensitive afferent vagal fibers are involved in concurrent taste aversion learning

Taste aversion learning (TAL) is a type of learning characterized by rejection of a gustatory/flavor stimulus as a consequence of its pairing with visceral discomfort and malaise. TAL can be established in the laboratory by two different behavioral procedures, concurrent or sequential. Neural mechanisms of these learning modalities remain to be elucidated, but several studies have discussed the implication of various anatomical structures, including the vagus nerve. The aim of this study was to examine the role of capsaicin-sensitive vagal afferent fibers in concurrent (Experiment 1) and sequential (Experiment 2) TAL in Wistar rats. Results showed that perivagal administration of capsaicin (1mg of capsaicin dissolved in 1ml of vehicle (10% Tween 80 in oil)) blocked acquisition of concurrent but not sequential TAL. These data support the hypothesis of two different modalities of TAL mediated by distinct neurobiological systems, with vagal nerve participation only being essential in concurrent TAL.     

Psychometric properties of the Situational Inventory of Body-Image Dysphoria-Short form in a Spanish sample

The primary objective of this study was to translate and validate Situational Inventory of Body-Image Dysphoria-Short form (SIBID-S) in a Spanish population. The scale consists of 20 items to assess the frequency of dysphoric body-image emotions in certain situational contexts, using a five-point rating scale. The questionnaire was administered to 214 women between the ages of 14 and 29 years, from primary and secondary schools and a university. Principal components analysis indicated a one-factor structure for the entire sample and both younger (<18) and older (≥18) participants. Internal consistency was high (0.94), and the test–retest reliability over 1 month ranged between 0.89 and 0.93. The SIBID-S showed good convergent validity in relation to other pertinent measures of body image, eating pathology, and self-esteem. Moreover, the SIBID-S was differentiated low-risk, subclinical eating disturbed, and clinical eating disordered patients. Results support the potential utility of the SIBID-S in the Spanish female population, including a younger group than previously studied, as well as its usefulness in the assessment of body image among females varying in degrees of eating pathology.     

Us without them: evidence for an intragroup origin of positive in-group regard

Four experiments examined whether group formation and positive in-group regard require interaggregate comparison as the in-group-requires-an-out-group assumption of the metacontrast principle implies. The authors fostered novel social aggregates with or without a contrasting aggregate with which members could compare and varied intra-aggregate factors (interaction or interdependence). Regardless of whether interaggregate comparison was feasible, the intra-aggregate factors increased the perceived entitativity of the aggregate and positive regard toward the aggregate (i.e., social attraction and cooperation among members). Mediation analyses were consistent with the possibility that the intra-aggregate factors promoted entitativity, which in turn promoted in-group regard. These data suggest that group formation and in-group regard have intragroup origins and do not require comparison with a contrasting social aggregate.     

The phenomenon of the tip of the tongue in aging

This paper presents new data on the tip of the tongue (TOT) phenomenon and its resolution in aging. 140 volunteers ranging from 19 to 82 years participated in an experiment using definitions about common names, proper names, adjectives and verbs to elicit TOTs. We studied the resolution of the TOTs introducing a free word-recall task and a priming task. Older adults experienced more TOTs than younger adults regardless of the level of vocabulary. Phonological priming, and not free recall of words, improved resolution for the older adults. The results are discussed in relation to the theory of the transmission deficit.     

Personality factors in relation to violent crimes

The personalities of a group of 54 persons (51 men and 3 women), imprisoned for the perpetration of violent crimes, were evaluated. The results were then compared to a normative group. This study considers personality factors and dimensions on three levels: (a) Basic factors: the "Big Five", (b) Personality disorders and clinical syndromes, (c) Personality dimensions related to personal wellbeing and social adaptation said to define a psychologically healthy individual. The results of the study show that it is not possible to define a basic personality profile for this group of violent delinquents based on the "Big Five" factors. It is, however, possible to find two habitual patterns of behaviour if the Millon Model (1990) is applied. These two behaviour patterns and attitudes towards life situations will be named "Dependent with compulsive traits" and "Psychopath tendencies". Both relate to indicators of mental health.     

Pathological gambling and personality disorders: a pilot-study with the MCMI-II

In this paper, the most frequent personality disorders related to pathological gambling are described. A sample of 50 pathological gamblers, who were assessed with the MCMI-II before treatment, and of 50 normative subjects from general population with the same demographic features (age, sex and socioeconomic level) was selected. According to the results, the 40% of clinical sample (versus the 14% of normative sample) showed at least one personality disorder. The most prevalent one was the Narcissistic (32%), followed by the Antisocial and Passive-Aggressive (16% each one of them). Furthermore, the gamblers with personality disorders presented an average of 2.2 disorders and tended to be more impulsive. Likewise pathological gamblers abused of alcohol, showed a mild anxiety and were not so adapted to everyday life as much as the control group. Finally, implications of this study for clinical practice and future research in this field are commented upon.     

A new model of sportive cooperation and its evaluation by means a questionnaire

We present in this paper the sportive cooperation as a theoretical framework for the teams' dynamics, and as an alternative to others theories, specially the sportive cohesion. This theory has a double basis: 1) The rational and utilitarist decision taking upon the personal cooperation or not, with the team's goal, based on the internal teammates interaction, and the environmental stimuli; and 2) A personal, and more stable, disposition to cooperate, despite the possibility of obtain any counterparts for this behavior. From this framework, we have build--in a three phase process--a questionnaire addressed to evaluate the sportive cooperation. The final version--composed of 15 items with standard psychometric propierties--shows two kinds of factors. First, we have two dispositional, traitlike, factors: The Conditional cooperation, and the Unconditional cooperation. Second, we have three situational factors: the Cooperation with the Coach, with the teammates, and the Cooperation outside the game and the training. Lastly, we discuss the maining of this theory respect to the sportive team's dynamics, and its relevance for the applied psychology, both for the evaluation and the interventions on the teams.