Post-training ethanol disrupts trace conditioned fear in rats: effects of timing of ethanol, dose and trace interval duration

Ethanol has complex effects on memory performance, although hippocampus-dependent memory may be especially vulnerable to disruption by acute ethanol intoxication occurring during or shortly after a training episode. In the present experiments, the effects of post-training ethanol on delay and trace fear conditioning were examined in adolescent rats. In Experiment 1, 30-day-old Sprague-Dawley rats were given delay or trace conditioning trials in which a 10s flashing light CS was paired with a 0.5 mA shock US. For trace groups, the trace interval was 10 s. On days 31-33, animals were administered ethanol once daily (0.0 or 2.5 g/kg via intragastric intubation), and on day 34 animals were tested for CS-elicited freezing. Results showed that post-training ethanol affected the expression of trace, but had no effect on delay conditioned fear. Experiment 2 revealed that this effect was dose-dependent; doses lower than 2.5 g/kg were without effect. Experiment 3 evaluated whether proximity of ethanol to the time of training or testing was critical. Results show that ethanol administration beginning 24h after training was more detrimental to trace conditioned freezing than administration that was delayed by 48 h. Finally, in Experiment 4 animals were trained with one of three different trace intervals: 1, 3 or 10s. Results indicate that post-training administration of 2.5 g/kg ethanol disrupted trace conditioned fear in subjects trained with a 10s, but not with a 1 or 3s, trace interval. Collectively the results suggest that ethanol administration impairs post-acquisition memory processing of hippocampus-dependent trace fear conditioning.     

What do the experts know? Calibration,precision, and the wisdom of crowds among forensic handwriting experts

Psychonomic Bulletin & Review - Forensic handwriting examiners currently testify to the origin of questioned handwriting for legal purposes. However, forensic scientists are increasingly being...     

Why did the white bear return? Obsessive-compulsive symptoms and attributions for unsuccessful thought suppression

The current study examined the nature and consequences of attributions about unsuccessful thought suppression. Undergraduate students with either high (n=67) or low (n=59) levels of obsessive–compulsive symptoms rated attributions to explain their unsuccessful thought suppression attempts. We expected that self-blaming attributions and attributions ascribing importance to unwanted thoughts would predict more distress and greater recurrence of thoughts during time spent monitoring or suppressing unwanted thoughts. Further, we expected that these attributions would mediate the relationship between obsessive–compulsive symptom levels and the negative thought suppression outcomes (distress and thought recurrence). Structural equation models largely confirmed the hypotheses, suggesting that attributions may be an important factor in explaining the consequences of thought suppression. Implications are discussed for cognitive theories of obsessive–compulsive disorder and thought suppression.     

EFFECTS OF INTERMITTENT PUNISHMENT ON SELF-INJURIOUS BEHAVIOR: AN EVALUATION OF SCHEDULE THINNING

Although the use of punishment often raises ethical issues, such procedures may be needed when the reinforcers that maintain behavior cannot be identified or controlled, or when competing reinforcers cannot be found. Results of several studies on the effects of intermittent schedules of punishment suggest that therapists must use fairly rich schedules of punishment to suppress problem behavior. However, residential caretakers, teachers, and parents often have difficulty implementing programs that require constant monitoring of the client's behavior. In this study, we examined the feasibility of gradually thinning the delivery of punishment from a continuous schedule to an intermittent schedule during the course of treatment for self-injurious behavior (SIB). Results of functional analyses for 5 individuals who had been diagnosed with profound mental retardation indicated that their SIB was not maintained by social consequences. Treatment with continuous schedules of time-out (for 1 participant) or contingent restraint (for the other 4 participants) produced substantial reductions in SIB. When they were exposed to intermittent schedules of punishment (fixed-interval [FI] 120 s or FI 300 s), SIB for all but 1 of the participants increased to levels similar to those observed during baseline. For these 4 participants, the schedule of punishment was gradually thinned from continuous to FI 120 s or FI 300 s. For 2 participants, SIB remained low across the schedule changes, demonstrating the utility of thinning from continuous to intermittent schedules of punishment. Results for the other 2 participants showed that intermittent punishment was ineffective, despite repeated attempts to thin the schedule.     

Personal relationships,personal attributes,and stress resistance: Mothers' reactions to their child's illness

The contribution to emotional distress of mastery, intimacy, received social support, and discomfort in seeking support was examined over a year period among 107 Israeli mothers of well, acutely ill, or chronically ill children. The following was found: (a) Women initially high in mastery experienced less psychological distress and benefited more from social support than did women low in mastery. (b) The greater social support women generally received the lower their psychological distress. (c) Independent of the level of generally received support, women who experienced greater distress received greater social support at the time of crisis. (d) Intimacy with spouse was related to better stress resistance, but the opposite was found for intimacy with family. (e) Women who felt uncomfortable seeking support were more distressed at the time of initial crisis than women who were more comfortable seeking support and became less intimate with significant others.     

Therapists' judgments of mentally healthy beliefs for women and men

Clinical and counseling literature indicates that practicing psychologists often observe different mental health standards for women and men. Most of this research has examined mental health in terms of personality attributes, and as such there is a noticeable lack of research concerned with mentally healthybeliefs. The present research was concerned with the investigation of a possible gender bias in therapists' mental health standards, defined in terms of personal beliefs. For this purpose, the Irrational Beliefs Test (IBT; Jones, 1969) was completed three different times by a group of licensed psychologists in private practice, measuring their beliefs of how (1) a mentally healthy sex-unspecified adult, (2) a mentally healthy male adult, and (3) a mentally healthy female adult would respond to the IBT. The results indicated that both women and men therapists associated unique beliefs with women's and men's mental health.The late Dr. Frank B. Lambert studied the philosophical foundations of psychotherapy theory and was concerned about value issues in the practice of psychotherapy. He was pursuing his Ph.D. in counseling psychology at the time of his untimely death.Portions of these data were presented at the 1985 annual meeting of the American Psychological Association, Los Angeles, California. Graditude is extended to Lucia Gilbert and Mark R. Leary for their helpful comments on an earlier version of this article.     

Self-Injurious Thoughts and Behaviors Interview: development, reliability, and validity in an adolescent sample

The authors developed the Self-Injurious Thoughts and Behaviors Interview (SITBI) and evaluated its psychometric properties. The SITBI is a structured interview that assesses the presence, frequency, and characteristics of a wide range of self-injurious thoughts and behaviors, including suicidal ideation, suicide plans, suicide gestures, suicide attempts, and nonsuicidal self-injury (NSSI). This initial study, based on the administration of the SITBI to 94 adolescents and young adults, suggested that the SITBI has strong interrater reliability (average kappa = .99, r = 1.0) and test-retest reliability (average kappa = .70, intraclass correlation coefficient = .44) over a 6-month period. Moreover, concurrent validity was demonstrated via strong correspondence between the SITBI and other measures of suicidal ideation (average kappa = .54), suicide attempt (kappa = .65), and NSSI (average kappa = .87). The authors concluded that the SITBI uniformly and comprehensively assesses a wide range of self-injury-related constructs and provides a new instrument that can be administered with relative ease in both research and clinical settings.