Analysis of treatments to alleviate forgetting in rats

Two experiments with rats investigated the effectiveness of prior-cuing treatments for alleviating forgetting of aversive conditioning. The aim was to see which retrieval cues would be most effective within different contexts. Experiment 1 examined the contexts of classical fear conditioning and instrumental avoidance training. The results indicated that the response components were sufficient to reinstate avoidance training, whereas the unconditioned stimulus (US) was most effective for classical fear conditioning. In Experiment 1, the reinforcer per se was ineffective in reinstating instrumental avoidance training. Experiment 2 manipulated the training context and found that the US could be made an effective prior-cuing treatment for instrumental training if classical conditioning components were more prevalent during training. These results are interpreted to mean that a "critical context" must be reinstated by the cuing treatment if this treatment is to promote retrieval of the memory.     

Ontogeny of cholinergic mediation of behaviors in the rat.

In a series of six experiments, cholinergic mediation of behavior was studied in immature rats. It was found that although scopolamine disrupted discriminative choice behavior in both 15- and 23-day-old rat pups, it increased latency to choice in 15-day-olds and decreased latency to choice in 23-day-olds. This disruption of discriminated choice behavior was not due to differential shock thresholds or differences in locomotor activity between drug-treated and control animals, nor was it specific to a T-maze shock-escape discrimination task. These results suggest that central cholinergic mediation of different behaviors may mature at different rates.     

‘Warm’ and ‘cold’ personality factors in human sexuality

Human sexual responsiveness in the coital relationship has been found to vary between sexual partners. The present study was conducted to determine: (1) the affect of ‘warm’ or ‘cold’ personalities of the sexual partners on foreplay, afterplay, pre- and post-communication, and (2) ‘warmness’ or ‘coldness’ demonstrated in acts of these criteria in the sexual relationship. Significant differences were found in each instance.     

Alleviation of forgetting of discrimination learning

Reactivation treatments intended to alleviate forgetting in rats were tested in two discrimination tasks—instrumental learning with brightness or with spatial location as the discriminanda. For memories acquired 28 days earlier, forgetting was alleviated with both tasks when testing was preceded by certain reactivation treatments. Therefore, the generality of the effectiveness of reactivation treatments for alleviating forgetting is extended to include discrimination learning and response measures other than go, no-go behavior.     

THE ROLE OF ATTENTION IN THE TREATMENT OF ATTENTION-MAINTAINED SELF-INJURIOUS BEHAVIOR: NONCONTINGENT REINFORCEMENT AND DIFFERENTIAL REINFORCEMENT OF OTHER BEHAVIOR

Because there are potentially serious limitations to differential reinforcement of other behavior (DRO) (which is probably the most widely used treatment procedure for behavior problems), we examined an alternative procedure—noncontingent reinforcement (NCR). Three females with developmental disabilities, all of whom engaged in severe self-injurious behavior, participated. During a pretreatment functional analysis, each subject's self-injury was shown to be differentially sensitive to social attention as a maintaining consequence. Next, each subject was exposed to a DRO treatment and an NCR treatment. During DRO, attention was delivered contingent on the absence of self-injury for prespecified intervals. During NCR, attention was delivered on a fixed-time schedule that was not influenced by the subject's behavior. Results showed that both procedures were highly effective in reducing self-injury, probably because the functional reinforcer for self-injury was used during treatment. Furthermore, there was evidence that NCR attenuated several of the limitations of DRO. These results are particularly interesting in light of the long experimental history of NCR as a control rather than as a therapeutic procedure.     

Memory and attention in combat-related post-traumatic stress disorder (PTSD)

Vietnam combat veterans assigned diagnoses of PTSD were compared on measures of attention/concentration, new learning, and memory with Army National Guard enlistees who reported no unusual traumatic events or stress-related symptoms. Results showed that PTSD veterans performed more poorly than the comparison sample on a measure of verbal learning, exhibiting less proficient cumulative acquisition across repeated exposures, greater sensitivity to proactive interference, and more perseverative errors. Veterans with PTSD diagnoses also evidenced impairments in word fluency and visual attention/tracking abilities. These preliminary findings suggest that diagnoses of chronic PTSD in combat veterans are associated with cognitive performance deficits, when comparisons are made with military troops judged to be free of stress-related psychopathology. Results are consistent with self-reported complaints of concentration and memory impairments among PTSD-diagnosed clinical samples, thus highlighting the need for continued investigation of the neuropsychologlcal sequelae of prolonged stress exposure.     

Time Structure and Purpose as a Mediator of Work-Life Linkages

This study explores time structure and purpose as a mediator of the relationship between the experience of work and well-being in life, taking into account personality factors. A recursive model is presented in which value attainment at work and job satisfaction are expected to positively affect life satisfaction directly and indirectly through their effects on time structure and purpose. A test of the model using questionnaire responses from 336 workers generally was supportive of the hypothesized relationships suggesting that one mechanism through which work may affect well-being is through work's influence on people's sense of time being spent in purposeful and meaningful ways. Support for the hypothesized role of personality in the model also was obtained. In general, these results are consistent with top-down and bottom-up theories of well-being suggesting that both types of processes likely operate in tandem. Implications of these results are discussed.