Psicobiología del síndrome de Down

Resumen

En este artículo revisamos los conocimientos que existen en la actualidad sobre el síndrome de Down, atendiendo a todos aquellos aspectos que, por su relevancia, facilitan una mejor comprensión de esta cromosomopatía. Después de una breve reseña histórica, y tras definir lo que se entiende por síndrome de Down, pasamos a ocuparnos de la alteración genética que lo determina, así como de los factores que parecen estar relacionados con su origen. A continuación estudiamos las alteraciones específicas que acompañan a este síndrome, considerando principalmente los aspectos morfológicos externos, el problema de la hipotonía muscular y otros trastornos biomédicos, el retraso mental y las diversas anomalías neuroanatómicas y neurofisiológicas que presentan los sujetos afectados. Por último, indicamos las nuevas perspectivas que se abren en el estudio de esta alteración genética.     

Perceived social image and life satisfaction across cultures

We studied the relationship between perceived social image and life satisfaction in four different cultural groups. One-hundred nine Indian (63 females, 46 males), 67 Pakistani/Bangladeshi (36 females, 31 males), 76 White British (43 females, 33 males), and 94 European Americans (43 females, 48 males) completed measures on the cultural importance of social image, positive and negative emotions, academic achievement, and perceived social image. Indian and Pakistani/Bangladeshi participants valued social image more than White British and European-American participants. Consistent with this value difference, a positive perceived social image predicted life satisfaction among Indian and Pakistani/Bangladeshi participants only. For these participants, perceived social image predicted life satisfaction above and beyond the effects of emotions and academic achievement. Academic achievement only predicted life satisfaction among White British and European Americans. Emotions were significant predictors of life satisfaction for all participants.     

Event Centrality,Posttraumatic Cognitions,and the Experience of Posttraumatic Growth

This study tested the extent to which negative appraisals following traumatic events and the centrality of traumatic events predicted posttraumatic growth (PTG; Tedeschi &; Calhoun, 1996 Tedeschi, R. G. and Calhoun, L. G. 1996. The posttraumatic growth inventory: Measuring the positive legacy of trauma. Journal of Traumatic Stress, 9: 76–80. [Crossref] , [Google Scholar]). Participants were 405 undergraduates at a Midwestern university who reported experiencing at least one traumatic event. Regression analyses indicated that the centrality of the event was a significant predictor for all five domains of PTG. Negative appraisals of the world were related to some domains of growth, but neither negative cognitions about the self nor self-blame was a significant predictor of any of the growth domains. Interpretation of these results is considered in light of the consistencies with Janoff-Bulman's (2004) Janoff-Bulman, R. 2004. Posttraumatic growth: Three explanatory models. Psychological Inquiry, 15: 30–34. [Crossref], [Web of Science ®] , [Google Scholar] explanatory models of development of PTG.     

Explicit Training in Human Values and Social Attitudes of Future Engineers in Spain

In Spain before the 1990s there was no clear and explicit comprehensive training for future engineers with regard to social responsibility and social commitment. Following the Spanish university curricular reform, which began in the early 1990s, a number of optional subjects became available to students, concerning science, technology and society (STS), international cooperation, the environment and sustainability. The latest redefinition of the Spanish curriculum in line with the Bologna agreements has reduced the number of non-obligatory subjects, but could lead to improving preparation for social responsibility due to the requirement that the design of curricula and the assessment of students should be based on competencies, some of which include human values and attitudes.     

Professional Ethical Issues and the Development of Professional Ethical Standards in Counseling and Clinical Psychology in China

This article aims to summarize the current ethical issues in the field of clinical and counseling psychology and the process of developing professional ethical standards in China. First, through a review of the history of counseling and psychotherapy in China, general background information is provided. Important ethical issues are then discussed based on the results from several empirical studies. Finally, the process of developing the new edition of the Chinese Psychological Society Code of Ethics for Clinical and Counseling Psychology, the main contents as well as the considerations taken into account in the development of this code are presented.     

Mirroring Activity in the Brain and Movement Determinant in the Rorschach Test

Human movement (M) responses to the Rorschach are related to cognitive sophistication, creativity, and empathy. Recent studies also link Ms to EEG-mu suppression, an index of mirroring activity in the brain. In this article, we further investigate the link between Ms and mu suppression by testing some clinical interpretative distinctions. Previously collected EEG data recorded during the administration of the Rorschach were reanalyzed. We hypothesized that (a) among several responses investigated, only M would be associated with mu suppression, and (b) Ms with active movement, ordinary form quality, or whole human figures would be most strongly associated with mu suppression. Hypothesis 1 was fully confirmed, thus supporting that the traditional interpretation of M has a neurobiological foundation. Hypothesis 2 was partially confirmed; that is, active Ms were associated with mu suppression more strongly than passive Ms (p < .05), but no other significant differences emerged. Clinical implications are discussed.     

Wives' and Husbands' Cortisol Reactivity to Proximal and Distal Dimensions of Couple Conflict

Poor marital quality has been linked repeatedly to spouses' health problems, with alterations to physiological stress response systems, such as the hypothalamic‐pituitary‐adrenocortical (HPA) axis, as one putative mechanism. This study assessed wives' and husbands' HPA axis (i.e., cortisol) reactivity to marital criticism during laboratory‐based conflict discussions, in the context of marital aggression experienced during the previous year. Ninety‐five couples provided one saliva sample prior to—and three samples following—a triadic family conflict discussion involving their teenage child. Marital criticism during the conflict discussion was related to heightened HPA reactivity for husbands only. For wives, an interaction emerged between criticism during the conflict and previous‐year marital aggression: only those wives who had experienced high levels of marital aggression demonstrated a positive association between criticism and cortisol output. Husbands thus appeared to be more physiologically reactive to the in‐the‐moment critical behaviors, whereas wives' responses to proximal conflict were related to previous and perhaps more chronic experiences of marital aggression. These findings shed light on ways in which within‐couple processes during family conflicts involving children contribute to individual physiological functioning, enhancing our understanding of the role of family relationships in physical health outcomes.     

The Relationship between Cultural Identification,Family Socialization and Adolescent Alcohol Use among Native American Families

The enculturation or teaching of Native American traditions to Native American adolescents has been incorporated into substance-use prevention interventions in recent decades; yet, little is known about how enculturation may impact substance use through family socialization. The current study aimed to test the relationship between family identification with Native American culture and alcohol use among Native American families residing on or near a reservation, and determine if this relationship was mediated by family socialization practices. To achieve this aim, data (n? =?2368) collected as part of the NIDA-funded Drug Use among Young American Indians was used. No direct relationship was found between identification with Native American culture and alcohol use. Native American culture had an indirect effect on substance use through family communication and parental monitoring, such that a higher identification with Native American culture was associated with more communication and less monitoring, which were associated with drinking behavior. Findings reveal that identification with Native American culture may be related to family socialization, a relationship that could be important to address when designing alcohol-use prevention interventions for this population.     

Restricted interests and teacher presentation of items

Restricted and repetitive behavior (RRB) is more pervasive, prevalent, frequent, and severe in individuals with autism spectrum disorders (ASDs) than in their typical peers. One subtype of RRB is restricted interests in items or activities, which is evident in the manner in which individuals engage with items (e.g., repetitious wheel spinning), the types of items or activities they select (e.g., preoccupation with a phone book), or the range of items or activities they select (i.e., narrow range of items). We sought to describe the relation between restricted interests and teacher presentation of items. Overall, we observed 5 teachers interacting with 2 pairs of students diagnosed with an ASD. Each pair included 1 student with restricted interests. During these observations, teachers were free to present any items from an array of 4 stimuli selected by experimenters. We recorded student responses to teacher presentation of items and analyzed the data to determine the relation between teacher presentation of items and the consequences for presentation provided by the students. Teacher presentation of items corresponded with differential responses provided by students with ASD, and those with restricted preferences experienced a narrower array of items.