Perception of parental socialization strategies in adoptive and non-adoptive families

Although parental socialization styles have been investigated in recent years, little research has been carried out on the issue of parental styles in adoptive families. The aim of this research is to analyse parental styles both from the point of view of the parents and of adopted and non-adopted adolescents, taking as covariables the adolescents' sex and age. The sample was made up of 55 adopted adolescents (20 boys and 35 girls with an age range of 11-17 years) and their 55 adoptive parents, and 402 non-adopted adolescents (200 boys and 202 girls with an age range of 11-17 years), and their 258 parents. Two scales evaluated parental styles: the Affect Scale and the Rules and Demands Scale. The results showed that, both from the point of view of the parents and of the adolescents, adoptive families are more affective, communicative and inductive, and less critical and indulgent than non-adoptive families. No differences were found between adopted and non-adopted adolescents on the Parents' Rigidity Scale.     

Personality and aesthetic preference in Spain and England: two studies relating sensation seeking and openness to experience to liking for paintings and music

In two studies, one employing Spanish students and the other English students, questionnaire measures of Sensation Seeking and Openness to Experience were correlated with liking for major music types, several short music excerpts, and eight categories of painting (presented as slides). Inter‐correlations between music preference measures, painting preference, and personality are reported. In both samples, the Sensation Seeking Scale (Form V) and, particularly, the Experience Seeking sub‐scale were associated with a factor contrasting liking for ‘hard rock’ music and ‘violent–abstract’ art with liking for ‘neutral–realistic’ art and ‘easy listening’ music. Several substantial relationships between aesthetics measures and Openness to Experience (from the NEO‐PI‐R) were also found, though mostly in the English sample. The results reinforce the view that personality dimensions such as Sensation Seeking and Openness are important influences on aesthetic judgment. Copyright © 2000 John Wiley & Sons, Ltd.     

Effects of fimbria lesions on trace two-way active avoidance acquisition and retention in rats

The fimbria-fornix (FF) is the main subcortical input to the hippocampus. It has been shown that FF lesions facilitate performance on a standard-delay two-way active avoidance task (AA2), thought to involve implicit memory. The hippocampal region is required for explicit or relational memory. It has been proposed that the hippocampus and related structures might associate events that are separated in space or time and detect elements shared in common by such discontiguous episodes. Therefore, FF lesions would be expected to impair performance on a trace paradigm, which introduces an interval between the CS (conditioned stimulus) and the US (unconditioned stimulus) and is generally considered a model of explicit memory. We predicted that FF lesions would impair memory in a trace AA2 procedure, while the same lesions would facilitate memory in a standard delay version of the task. To test this hypothesis, two experiments were carried out in 102 male Wistar rats. The first experiment characterized the trace paradigm using this kind of conditioning and demonstrated that control rats were able to acquire and retrieve (24 h and 11 days postacquisition) the association between the CS (tone) and the US (electric foot shock) when a trace interval (5, 10, or 20 s) was interposed between both stimuli. In the second experiment, we investigated the effects of FF electrolytic lesions on the same task using delay and trace (10-s trace interval) paradigms. Surprisingly, FF lesions facilitated the acquisition and the 24-h retention of the AA2 not only on the standard delay paradigm, but also with the trace paradigm. We suggest that facilitative effects could be a result of impairment in contextual learning.     

The Small Worlds and Floyd's algorithms: a way to study scientific collaboration

Many proposals from the analysis of social networks focused on the study of scientific collaboration have been made recently. The Small Worlds theory seems to be the most efficient to study the inner features of the scientific community. Those researches have demonstrated that small communities are based on some key individuals who connect some groups which, on the contrary, would be disconnected. One of the disadvantages from the perspective of the analysis of networks is the lack of researches of particular nodes. With the implementation of a pseudocode algorithm of Floyd, we try to avoid this. To study how a small community is formed and, as a research of one case, we observe the invisible college which is formed when connecting the fifteen most productive authors of the Journal of Personality and Social Psychology .     

Constrained motor-perceptual task in infancy: effects of sensory modality

The authors examined the relative success of varying sensory stimulation modalities that they presented via a mobile reinforcement procedure for promoting left-knee extensions in 3-month-old infants. They separated 53 infants into 5 groups. Four groups received contingent unimodal auditory, enhanced auditory, or visual reinforcement or contingent bimodal auditory plus visual (aud + vis) reinforcement. One group (controls) received aud + vis noncontingent reinforcement. The group that received aud + vis contingent reinforcement was most successful in learning the motor task and maintained the highest attention levels. The authors observed few differences in learning and attention within the unimodal groups. The present findings confirm the effectiveness of contingent multisensory stimulation for promoting perception-action coupling in infancy.     

The activation of representative emotional verbal contexts interacts with vertical spatial axis

Several experimental studies have shown that there exists an association between emotion words and the vertical spatial axis. However, the specific conditions under which this conceptual–physical interaction emerges are still unknown, and no study has been devised to test whether longer linguistic units than words can lead to a mapping of emotions on vertical space. In Experiment 1, Spanish and Colombian participants performed a representative verbal emotional contexts production task (RVEC task) requiring participants to produce RVEC for the emotions of joy, sadness, surprise, anger, fear, and disgust. The results showed gender and cultural differences regarding the average number of RVEC produced. The most representative contexts of joy and sadness obtained in Experiment 1 were used in Experiment 2 in a novel spatial–emotional congruency verification task (SECV task). After reading a sentence, the participants had to judge whether a probe word, displayed in either a high or low position on the screen, was congruent or incongruent with the previous sentence. The question was whether the emotion induced by the sentence could modulate the responses to the probes as a function of their position in a vertical axis by means of a metaphorical conceptual–spatial association. Overall, the results indicate that a mapping of emotions on vertical space can occur for linguistic units larger than words, but only when the task demands an explicit affective evaluation of the target.     

Exploring the role of national culture on knowledge practices: a comparison between Spain and the UK

In the context of a competitive knowledge-based economy, the knowledge provided by a firm's founders is one of the most important measures of success. This paper aims to identify the role of national culture on a founder's knowledge practices in a modern organisation. Using data collected from 258 Small to Medium sized Enterprises (SME(S)) in the Spanish and UK telecommunication industries (130 from Spain and 128 from the UK), we propose three knowledge management practices to be analysed; namely transfer, transformation and open-mindedness. This paper provides evidence that while Spanish SME(S) are more positively associated with higher levels of transfer and transformation of knowledge, UK SME(S) are more positively associated with higher levels of open-mindedness. Hence, this study serves as an important contribution to the small amount of literature currently available in this field by examining different practices that can be explained by the cultural characteristics of both countries.     

Cross-cultural differences in female university students' attitudes toward homosexuals: a preliminary study

62 Caucasian, 61 Hispanic, and 44 Asian female undergraduates completed the Index of Homophobia by Hudson and Ricketts, seven items from the Attitudes Toward Lesbians and Gay Men Scale by Herek, and three questions on Affectional Orientation toward homosexuals from D'Augelli and Rose. Overall, familiarity with homosexuals as measured by self-reported number of homosexual friends correlated negatively with scores on the homophobia measures, but there were no significant differences among the groups' reported number of homosexual friends. Asian students scored significantly higher on the homophobia measures than Caucasian students. Both Asian and Hispanic students endorsed the statement significantly more often than Caucasian students that the university would be better if only heterosexuals attended. No significant differences in scores were found regarding attitudes toward lesbians versus gay men.     

Lightness depends on immediately prior experience

The lightness hangover illusion is an unusually robust, long-lasting, prior-experience-based lightness effect. The effect occurs in the Mondrian world, a miniature chamber with interior walls covered with dark gray to black patches. The lightest patch in this scene, physically dark gray, looks white. When real whites and light grays are added to the scene, all the patches darken, but at an unusually slow rate. For several seconds, the white patches look self-luminous and the other patches continue to look very light. The luminosity fades and the other patches darken only after 2 min. We tested three possible explanations for this illusion: retinal adaptation, lightness persistence, and anchor persistence. The results clearly support anchor persistence, which is caused by the presence of steady patches, surfaces that retain their luminance values across scenes. The data also show that the size of the illusion varies directly with the number of these steady patches.     

Polyaminergic agents modulate contextual fear extinction in rats

Polyamines, such as spermidine and spermine, have been reported to improve memory retention through the activation of N-methyl-d-aspartate receptors (NMDAr). However whether polyamine agonists and antagonists alter extinction remains unclear. In the current study, we investigated whether spermidine and polyamine antagonists that selectively block the NR2B subunit at the NMDAr alter the extinction of contextual conditioned fear in male Wistar rats. The bilateral intra-hippocampal administration of exogenous spermidine (2 nmol/site) immediately after, but not 6 h after extinction training, facilitated the extinction of fear conditioning. The injection of the NMDAr antagonists arcaine (0.2 nmol/site), ifenprodil (20 nmol/site) and traxoprodil (0.2 nmol/site), disrupted fear extinction and, at doses that had no effect per se, reversed the facilitatory effect of spermidine on fear extinction. These results suggest that exogenous and endogenous polyamines facilitate the extinction of contextual conditioned fear through activation of NR2B subunit-containing NMDAr in the hippocampus. Since extinction-based exposure therapy is widely used as treatment for a number of anxiety-related disorders, including phobias and post-traumatic stress, the currently reported facilitation of extinction by polyaminergic agents suggest these compounds as putative candidates for drug development.