Human trace fear conditioning: right-lateralized cortical activity supports trace-interval processes

Pavlovian conditioning requires the convergence and simultaneous activation of neural circuitry that supports conditioned stimulus (CS) and unconditioned stimulus (US) processes. However, in trace conditioning, the CS and US are separated by a period of time called the trace interval, and thus do not overlap. Therefore, determining brain regions that support associative learning by maintaining a CS representation during the trace interval is an important issue for conditioning research. Prior functional magnetic resonance imaging (fMRI) research has identified brain regions that support trace-conditioning processes. However, relatively little is known about whether this activity is specific to the trace CS, the trace interval, or both periods of time. The present study was designed to disentangle the hemodynamic response produced by the trace CS from that associated with the trace interval, in order to identify learning-related activation during these distinct components of a trace-conditioning trial. Trace-conditioned activity was observed within dorsomedial prefrontal cortex (PFC), dorsolateral PFC, insula, inferior parietal lobule (IPL), and posterior cingulate (PCC). Each of these regions showed learning-related activity during the trace CS, while trace-interval activity was only observed within a subset of these areas (i.e., dorsomedial PFC, PCC, right dorsolateral PFC, right IPL, right superior/middle temporal gyrus, and bilateral insula). Trace-interval activity was greater in right than in left dorsolateral PFC, IPL, and superior/middle temporal gyrus. These findings indicate that components of the prefrontal, cingulate, insular, and parietal cortices support trace-interval processes, as well as suggesting that a right-lateralized fronto-parietal circuit may play a unique role in trace conditioning.     

Behavioral Management of Inappropriate Masturbation in an 8-Year-Old Girl

An 8-year-old girl, previously diagnosed with infantile masturbation, was referred and treated for inappropriate masturbation. Treatment involved age-appropriate sexual education, reinforcement contingencies, the use of distraction and redirection, and when necessary, timeout. The inappropriate masturbation behavior was substantially reduced during treatment phase from daily occurrence to occasional occurrence, and at 6-week post-treatment follow-up, inappropriate masturbation was absent.     

The Power of Positive Recollections: Reducing Test Anxiety and Enhancing College Student Efficacy and Performance

This research sought to develop an intervention (targeting positive emotions and thoughts) as a mechanism for reducing test anxiety and raising confidence and performance in a sample of college students. Participants were randomly assigned to a positive thought task or a control task. Those in the positive‐thought condition, who were assigned to write about successful personal experiences, derived several benefits, when compared with control participants who wrote about their morning routines. Specifically, they experienced more positive affect and less negative affect, exhibited a more optimistic outlook, and reported less test anxiety. They were more likely to appraise the quiz confidently, perceiving it as a challenge rather than a threat. Perhaps most importantly, they exhibited superior performance on the quiz.     

Distributive Luck

Abstact

This article explores the Rawlsian goal of ensuring that distributions are not influenced by the morally arbitrary. It does so by bringing discussions of distributive justice into contact with the debate over moral luck initiated by Williams and Nagel. Rawls’ own justice as fairness appears to be incompatible with the arbitrariness commitment, as it creates some equalities arbitrarily. A major rival, Dworkin’s version of brute luck egalitarianism, aims to be continuous with ordinary ethics, and so is (a) sensitive to non-philosophical beliefs about free will and responsibility, and (b) allows inequalities to arise on the basis of option luck. But Dworkin does not present convincing reasons in support of continuity, and there are compelling moral reasons for justice to be sensitive to the best philosophical account of free will and responsibility, as is proposed by the revised brute luck egalitarianism of Arneson and Cohen. While Dworkinian brute luck egalitarianism admits three sorts of morally arbitrary disadvantaging which correspond to three forms of moral luck (constitutive, circumstantial, and option luck), revised brute luck egalitarian-ism does not disadvantage on the basis of constitutive or circumstantial luck. But it is not as sensitive to responsibility as it needs to be to fully extinguish the influence of the morally arbitrary, for persons under it may exercise their responsibility equivalently yet end up with different outcomes on account of option luck. It is concluded that egalitarians should deny the existence of distributive luck, which is luck in the levels of advantage that individuals are due.     

Chronic PTSD Treated With Metacognitive Therapy: An Open Trial

This paper reports on an open trial of metacognitive therapy (MCT) for chronic PTSD. MCT does not require imaginal reliving, prolonged exposure, or challenging of thoughts about trauma. It is based on an information-processing model of factors that impede normal and in-built recovery processes. It is targeted at modifying maladaptive styles of worry/rumination and attention so that emotional processing can proceed spontaneously. Eleven out of 13 patients with a mean duration of PTSD of 19.5 months completed treatment. Therapists followed the treatment manual by Wells and Sembi (2004b). Self-report measures of PTSD symptoms, anxiety and depression, and assessor ratings of PTSD were administered at pre- and posttreatment, and at 3- and 6-month follow-up. Treatment appeared to result in large and significant improvements on all measures of PTSD and general measures of anxiety and depression. Statistically significant treatment gains were maintained at 3- and 6-month follow-up. Jacobson's criteria for recovery showed that 90% of patients were recovered at posttreatment. At 6-month follow-up approximately 89% were recovered or reliably improved. Results suggest that MCT could be highly effective and extend evidence of its applicability to more treatment-resistant chronic PTSD cases. Comparisons against other active interventions are now clearly indicated.