Sustained and transient modulation of performance induced by emotional picture viewing

We investigated how viewing task-irrelevant emotional pictures affects the performance of a subsequent nonemotional visual detection task. Subjects performed target-detection trials following the offset of individual unpleasant, pleasant, and neutral pictures. Sustained interference occurred when subjects viewed unpleasant pictures (mutilated bodies) in a sequential, "blocked" fashion. Such slowing down of reaction time appeared to build up with time, consistent with the instatement of a defensive emotional state. With a randomized picture presentation, only a transient interference effect was observed, consistent with increased attentional demands during the processing of unpleasant pictures. During blocked presentation of affiliative pleasant pictures, reaction times were faster, suggesting the activation of appetitive motivational systems. Ultimately, both attentional and motivational systems are intricately tied in the brain and, together, determine behavior.     

Taxonomic Examination of ADHD and Conduct Problem Comorbidity in Elementary School Children Using Cluster Analyses

Cluster analysis was used to investigate the classification of comorbid Attention Deficit Hyperactivity Disorder (ADHD) +Conduct Problems (CP). Teachers rated 1394 elementary school children on symptoms of inattention, hyperactivity/impulsivity, opposition, and conduct problems using the ADS-IV behavior-rating scale. Results suggested that a seven-cluster solution, including two distinct comorbid clusters, was the most appropriate method of classifying children according to behavioral symptoms. A one-way MANOVA showed that overall cluster profiles differed significantly from each other, whereas one-way ANOVAs indicated that clusters differed on age and symptom scores. Chi-square analyses indicated that clusters differed on gender. Post hoc analyses and effect sizes calculations revealed that the comorbid clusters differed from each other and from their single-disorder counterparts on some variables, but not on all. These results provide support for an additive conceptualisation of ADHD +CP.     

Trace eyeblink conditioning requires the hippocampus but not autophosphorylation of alphaCaMKII in mice

Little is known about signaling mechanisms underlying temporal associative learning. Here, we show that mice with a targeted point mutation that prevents autophosphorylation of alphaCaMKII (alphaCaMKII(T286A)) learn trace eyeblink conditioning normally. This forms a sharp contrast to the severely impaired spatial learning in the water maze and contextual fear conditioning observed in alphaCaMKII(T286A) mutants. Importantly, hippocampal lesions impaired trace eyeblink conditioning in alphaCaMKII(T286A) mice, suggesting a potential role of hippocampal alphaCaMKII-independent mechanisms. These results indicate that hippocampal signaling mechanisms that underlie temporal associative learning as assessed by trace eyeblink conditioning may differ from those of spatial and contextual learning.     

Failure to overcome 'innate' fear: a developmental test of the non-associative model of fear acquisition

The non-associative, Darwinian theory of fear acquisition proposes that some individuals fail to overcome biologically-relevant fears (e.g. height) because they (1) do not have sufficient safe exposure to the relevant stimuli early in life or (2) are poor habituators who have difficulty 'learning not to fear'. These two hypotheses were tested in a longitudinal birth cohort study. Study 1 found evidence for reduced exposure to height stimuli in childhood for individuals with a fear of heights compared to study members without fear. Study 2 found evidence for higher levels of stress reactivity (a proxy for habituation) in childhood and adolescence among 18-year-old height phobics compared to study members with dental phobia and those with no fear. The results were discussed in relation to recent findings suggesting that some evolutionary-relevant fears may appear in the absence of traumatic 'learning' experiences. The merits of adding a fourth, non-associative pathway to Rachman's [Rachman, S. (1977)]. The conditioning theory of fear acquisition: a critical examination. Behaviour Research and Therapy, 15, 375-387) three pathways model of fear acquisition were briefly considered.     

Microstructural development during transient directional solidification of a hypomonotectic Al–In alloy

Upward directional non-steady-state solidification experiments have been performed on a hypomonotectic Al–5.5?wt%In alloy. The alloy developed cellular as-solidified microstructure for tip growth rates, V _L, higher than 0.95?mm/s. The casting regions associated with V _L?<?0.95?mm/s were shown to be characterized by a microstructure formed by In droplets disseminated in the Al matrix. Tip growth rate and microstructural features, such as cell spacing and interphase spacing, have been experimentally determined. The experimental cell spacings have been compared with theoretical predictions furnished by the Hunt–Lu model. It was found that the experimental scatter lies below the minimum range of values theoretically predicted. Moreover, the experimental cell spacing evolution with V _L is characterized by a ?1.1 power law. The droplets’ interphase spacing, λ, is related to the growth rate by the Jackson–Hunt relationship (λ ² V _L?=?constant).     

Hunger-related intrusive thoughts reflect increased accessibility of food items

The elaborated intrusion model (Kavanagh, Andrade, & May, 2005) argues that a craving episode begins with a desire-related intrusive thought. This study tests the assumption that such intrusive thoughts, during hunger, reflect an increase in accessibility of food-related information in memory. Fifty-six undergraduates were randomly assigned to hungry or satiated conditions. Hunger was manipulated by asking the “hungry” group to abstain from eating breakfast and snacks prior to testing before lunch, while the “satiated” group was asked to eat normally and attend testing after lunch. Participants completed a lexical decision task containing food-related and neutral words, an intrusive thoughts questionnaire and a hunger questionnaire. Priming for food-related items relative to neutral on the lexical decision task was higher for hungry participants than satiated participants. Priming correlated strongly with frequency of food-related intrusive thoughts during the task. We conclude that desire-related lexical decision priming could provide a useful objective correlate of proneness to desire-related intrusions.     

Fear,excitement, and financial risk-taking

Can fear trigger risk-taking? In this paper, we assess whether fear can be reinterpreted as a state of excitement as a result of contextual cues and promote, rather than discourage, risk-taking. In a laboratory experiment, the participants' emotional states were induced (fear vs. control), followed by a purportedly unrelated financial task. The task was framed as either a stock market investment or an exciting casino game. Our results showed that incidental fear (vs. control) induced risk-averse behaviour when the task was framed as a stock investment decision. However, fear encouraged risk-taking when the very same task was framed as an exciting casino game. The impact of fear on risk-taking was partially mediated by the excitement felt during the financial task.     

Cognitive-Based Compassion Training: A Promising Prevention Strategy for At-Risk Adolescents

Compared to the general population, youth in foster care experience multiple psychosocial difficulties due to exceptionally high rates of maltreatment. Many youth in care receive psychological and/or psychotropic treatment but not all require or are willing to accept that level of intervention. For many, a “mental health” approach feels pathologizing. Nevertheless, these youth have suffered maltreatment and interventions to improve their ability to cope with past trauma and their often uncertain present are clearly needed. Cognitively-Based Compassion Training (CBCT) provides an alternative perspective on suffering and can be framed as a wellness intervention that is appropriate for all humans. The present study examined whether a 6-week CBCT intervention would improve psychosocial functioning among adolescents in foster care. Seventy adolescents were randomized to CBCT (twice weekly) or a wait-list condition. Youth were assessed at baseline and after 6 weeks. Groups did not differ on measures of psychosocial functioning following training; however practice frequency was associated with increased hopefulness and a trend for a decrease in generalized anxiety. Qualitative results indicated that participants found CBCT useful for dealing with daily life stressors. Adolescents in care were willing to engage in CBCT. The majority reported CBCT was very helpful and almost all reported they would recommend CBCT to a friend. Participants reported specific instances of using CBCT strategies to regulate emotion, manage stress, or to respond more compassionately towards others. Standardized self-report measures were not sensitive to qualitative reports of improved functioning, suggesting the need for measures more sensitive to the positive changes noted or longer training periods to demonstrate effects. Practical issues surrounding implementation of such programs in high-risk youth populations are identified. Recommendations are provided for further development.     

One More Datum on Rorschach Form Quality

The central purpose of this work is to examine to what extent Form Quality (FQ) scoring of Rorschach responses, using Exner's (2003) Table A, is the reason for lower FQ to often be found in normative data outside the United States. The Rorschach protocols of 180 Portuguese boys and girls between 6 and 10 years of age were codified with respect to Form Quality in accordance with Exner's table of objects classified as ordinary, unusual, and minus, based on frequencies seen among U.S. adults and on an analogous Portuguese table (Table P) constructed from the protocols of 400 nonpatient children. Mean differences between the various FQ variables of the 2 tables were found to be insignificant. However, use of Janson's (2003) iota coefficient to evaluate agreement between the 2 approaches to scoring on the same protocols revealed that the more striking differences occurred in the FQu variable when agreement was assessed on the basis of each individual response. In view of these results, the authors recognize the possibility of Rorschach normative data to be universally applied, but still consider the possible advantage of each country or culture to build its own FQ table that will permit preservation of its particularities.