A model for recovery-from-extinction effects in Pavlovian conditioning and exposure therapy.

Exposure therapy is an effective intervention for anxiety-related problems. The mechanism of this intervention has been the extinction procedure in Pavlovian conditioning, and this application has provided many successful instances for the prevention of relapse. However, traditional associative theories cannot comprehensively explain many findings. In particular, it is difficult to explain the recovery-from-extinction effects, which is the reappearance of the conditioned response following extinction. In this paper, we propose an associative model that is a mathematical extension of Bouton's (1993, Psychological Bulletin, 114, 80-99) model for the extinction procedure. The core of our model is that the asymptotic strength of the inhibitory association depends on the degree of excitatory association retrieved in a context in which a conditioned stimulus (CS) is presented and that the retrieval is determined by the similarity between contexts during both reinforcement and non-reinforcement and the retrieval context. Our model provides an explanation of the recovery-from-extinction effects, and implications for exposure therapy.

Early adolescent psychological adaptation differences by stress-coping profiles: a latent transition analysis.

BACKGROUND & OBJECTIVES: This study sought to reveal adolescent coping profiles by focusing on the combination of help-seeking and active/passive coping styles, and to compare affective and school adaptation levels across different profiles. DESIGN: One-year longitudinal data were collected from 695 Japanese secondary-school students (359 males, 330 females, and 6 unknowns) every semester. All participants reported their positive/negative affect and school adaptation. Only those who experienced any personal problem in the past month completed self-report measures including four stress-coping strategies use. METHODS: Latent transition analysis (LTA) was conducted to identify stress-coping profiles and their transitions, conducting Tukey's tests to examine the association between the profiles and psychological adaptability. RESULTS: LTA suggested a seven-class solution. One of the profiles represented participants who did not report any stressor during the past month, and the other six classes were sorted by the amount of help-seeking (low, moderate, and high) and active/passive coping style. The results indicated that simultaneous use of help-seeking and active coping was important for school adaptation and affect balance. Low-adaptation profiles showed high stability during the investigation period. CONCLUSIONS: Findings suggest that clinicians should assess and intervene with help-seeking and stress-coping styles before or during early adolescence.

Rhodium-catalyzed C-H bond activation/[4 + 2] annulation/aromatization cascade to produce phenol, naphthol, phenanthrenol, and triphenylenol derivatives.

It has been established that a cationic rhodium(I)/dppp complex catalyzes the aldehyde C-H bond activation/[4 + 2] annulation/aromatization cascade to produce phenol, naphthol, phenanthrenol, and triphenylenol derivatives from readily available conjugated alkynyl aldehydes and alkynes.

Rh-catalyzed [4 + 2] carbocyclization of vinylarylaldehydes with alkenes and alkynes leading to substituted tetralones and 1-naphthols.

Regio-, diastereo-, and enantioselective intermolecular [4 + 2] carbocyclizations of vinylarylaldehydes with alkenes and alkynes leading to substituted tetralones and 1-naphthols have been developed by using a cationic rhodium(I)/dppb or dppp complex as a catalyst.