Muscarinic cholinergic receptor blockade in the rat prelimbic cortex impairs the social transmission of food preference

Previous findings demonstrate the involvement of the cholinergic NBM in the acquisition of the social transmission of food preference (STFP), a relational associative odor-guided learning task. There is also evidence that muscarinic receptors in the medial prefrontal cortex, an important NBM target area, may modulate olfactory associative memory. The present experiment determined the consequences of blocking muscarinic cholinergic receptors in a component of the medial prefrontal region (the prelimbic cortex) on the STFP task. Adult male Wistar rats were bilaterally infused with scopolamine (20 microg/site) prior to training and showed a severe impairment in the expression of the task measured in two retention sessions, both immediately and 24h after training. Local scopolamine injections in the prelimbic cortex did not affect other behavioral measures such as olfactory perception, social interaction, motivation to eat, neophobia, or exploration. Results suggest that muscarinic transmission in the prelimbic cortex is essential for the STFP, supporting the hypothesis that ACh in a specific prefrontal area is important for this naturalistic form of olfactory relational memory. Current data are discussed in the context of disruption of learning as a result of interferences in PLC functions such as behavioral flexibility, attention, and strategic planning.     

中国高中学生中的反应风格及其效应

通过测试正反向陈述的NEO-FFI和EPQ,探讨了中国高中生中默认、极端化、折中化、弹性反应风格的特点,及题目陈述方向的改变对其人格测验信效度的影响。结果发现反应风格在中国高中生中确实存在,折中化和弹性风格对测验的影响最为严重,其次为极端化风格,默认风格则可能不算一种偏差。NEO-FFI量表在使用反向陈述题目时信效度下降,说明由于教育水平低而使高中生理解反向题时存在困难     

Exploring triangulation in infancy: two contrasted cases

Two contrasted father-mother-infant interactions are observed longitudinally during trilogue play. They illustrate the contribution of recent research to the exploration of triangulation in infancy: namely, the infant's capacity to handle triangular interactions and share her affects with her two parents, and the way that this capacity is recruited in functional versus problematic alliances. It is likely that an infant under stress when interacting with one parent will protest at that parent and also at the other. Such is the case when, for example, the father acts intrusively while playing with his baby. The infant is then driven to avert and turns to the mother. The regulation of this dyadic intrusion-avoidance pattern at family level depends on the family alliance. When coparenting is supportive, the mother validates the infant's bid for help without interfering with the father. Thus, the problematic pattern is contained in the dyad, and the infant's triangular capacities remain in the service of her own developmental goals. But when coparenting is hostile-competitive, the mother ignores the infant's bid or engages with her in a way that interferes with her play with her father. In this case, the infant's triangular capacities are used to relieve the tension between the parents. The importance of tracing family process back to infancy for family therapy is discussed.     

Brief strategic family therapy: lessons learned in efficacy research and challenges to blending research and practice

In this article, we present key lessons that we have learned from (1) a long program of research on an empirically supported treatment, brief strategic family therapy (BSFT), and (2) our ongoing research and training efforts related to transporting BSFT to the front lines of practice. After briefly presenting the rationale for working with the family when addressing behavior problems and substance abuse in adolescent populations, particularly among Hispanic adolescents, we summarize key findings from our 30-year program of research. The article closes by identifying barriers to the widespread adoption of empirically supported treatments and by presenting current work within the National Institute on Drug Abuse's Clinical Trials Network that attempts to address these barriers and obstacles.     

Play with me at my speed: describing differences in the tempo of parent-infant interactions in the Lausanne Triadic Play paradigm in two cultures

The goal of the present study was to examine the tempo of triadic play in Swedish and American families through a comparison of 20 families from each culture. When infants were approximately 3 months old, families in both cultures participated in the Lausanne Triadic Play (LTP), a paradigm that facilitates the examination of the triad as a whole and an organization of its parts. All family play sessions were coded separately in Sweden and America using coding systems that had been developed in each country. Dynamics within the triadic play were compared across cultures, and also across coding systems. Results indicated that both coding systems described a distinct difference in the tempo of play between American and Swedish Families. Overall, although there were many similarities between countries, American families were found to have a faster pace in triadic play than Swedish families. This difference in tempo is explored in the data analyses and the discussion of this article.     

Flexible conceptual projection of time onto spatial frames of reference

Flexibility in conceptual projection constitutes one of the most challenging issues in the embodiment and conceptual metaphor literatures. We sketch a theoretical proposal that places the burden of the explanation on attentional dynamics in interaction with mental models in working memory that are constrained to be maximally coherent. A test of this theory is provided in the context of the conceptual projection of time onto the domain of space. Participants categorized words presented at different spatial locations (back–front, left–right) as referring to the past or to the future. Responses were faster when the irrelevant word location was congruent with the back–past, front–future metaphoric mapping. Moreover, when a new highly task-relevant spatial frame of reference was introduced, it changed the projection of past and future onto space in a way that was congruent with the new frame (past was now projected to left space and future to right space), as predicted by the theory. This study shows that there is substantial flexibility in conceptual projection and opens a venue to study metaphoric variation across tasks, individuals, and cultures as the result of attentional dynamics.     

Sequential effects on speeded information processing: a developmental study

Two experiments were performed to assess age-related changes in sequential effects on choice reaction time (RT). Sequential effects portray the influence of previous trials on the RT to the current stimulus. In Experiment 1, three age groups (7-9, 10-12, and 18-25 years) performed a spatially compatible choice task, with response-to-stimulus intervals (RSIs) of 50 and 500 ms varied between trial blocks. In Experiment 2, three age groups (7-9, 15-16, and 18-25 years) performed the task with spatial stimulus-response (S-R) mappings (compatible versus incompatible) varied between participants. For adults, the experiments yielded a pattern of sequential effects suggestive of "automatic facilitation" (i.e., a first-order repetition effect and a higher order benefit-only pattern for short RSIs) and "subjective expectancy" (i.e., a first-order alternation effect and a higher order cost-benefit pattern for long RSIs). Automatic facilitation was more pronounced for incompatible responses than for compatible responses. Both experiments showed the anticipated decrease in automatic facilitation with advancing age. Finally, the first-order alternation effect showed the predicted age-related increase, but the cost-benefit pattern revealed an opposite trend, suggesting that the first-order and higher order indexes of subjective expectancy may relate to dissociable mechanisms.     

A Place at the Table: Integrating Diet and Nutrition into Family Therapy Practice

Most schools of family therapy directly or indirectly recognize that personal qualities of the therapist influence therapy process. If personal qualities of therapists are associated with therapy process, it seems plausible that there would be some interaction between their personal relationships and therapy process. The present study examines the relationship between emotion management at home and emotion management at work to job satisfaction and marital satisfaction of marriage and family therapists. Results suggest that men and women experience a different interaction between emotion management, relationship satisfaction, and job satisfaction.