Biomedical subjects

S Rachman

Publications and source records attributed to S Rachman.

At least 55 records · Page 3Linked to original sources

PubMed1992

A search for contrast effects with fear evoking stimuli.

The occurrence of fear contrast effects was investigated in a laboratory study of fearful people. A total of 65 university students were exposed on separate occasions to two fearful stimuli (spiders and snakes). The first exposure session was manipulated so that experimental groups differed in the amount of fear evoked by the stimulus (high fear, moderate fear and low fear). Exposure to the second animal was designed to produce a moderate level of fear in all subjects. During exposure to the animals, measures of subjective fear and heart rate were taken. Compared to a control group of subjects who experienced moderate fear on two occasions, a prior high fear experience led to a decrease in fear of the second stimulus, and a prior low fear experience led to an increase in fear of the second stimulus. The increase in fear in the latter group was evident in both subjective and physiological indices of fear, but in the high fear group the contrast was evident only in subjective fear.

Adult↗

PubMed1990

Affect, pain, and autobiographical memory.

Twenty-five young female undergraduates were tested on two occasions: once when they were experiencing menstrual pain of at least moderate severity and once when they were pain free. On each occasion, Ss rated their current levels of pain and affect and retrieved real-life events from their personal past. At the end of the second occasion, Ss were reminded of all of the events they had retrieved on either occasion, and then rated the pleasantness of these events at the time of their original occurrence. Results revealed that the impact of pain on autobiographical memory was wholly mediated by its influence on mood. That is, pain impeded access to memories of pleasant personal experiences, whereas it promoted the retrieval of unpleasant events only if pain was accompanied by an increase in unpleasant affect. Discussion centers on the clinical and cognitive implications of the present results, and on prospects for future research.

Adaptation, Psychological↗

PubMed1989

Safety-signal therapy in agoraphobics: a preliminary test.

It has been argued that persistent avoidance behaviour is strongly influenced by safety signals, and that agoraphobic avoidance behaviour is a clinical example of this influence. It was proposed that agoraphobic avoidance can be reduced by the judicious use of safety signals, and specifically, by training patients to travel towards rather than away from safety. A safety-signal technique in which the patient travelled towards the therapist at the most fear-inducing situations was compared with conventional therapist-assisted exposure. In the second part of the treatment programme, both groups of agoraphobics were given homework assignments. The safety-signal technique resulted in slightly better clinical gains than those achieved by therapist assisted exposure, but after these relatively brief programmes, the improvements in both groups were weak. Global clinical outcome was influenced by age, chronicity and long-term benzodiazepine use.

Accident Prevention↗

PubMed1989

The effect of an aversive event on the return of fear.

An experiment on the return-of-fear (ROF) was carried out on 40 snake- or spider-phobic subjects in order to determine whether an arousing event that occurs shortly before retest influences the magnitude of the ROF. Additionally, we attempted to produce a reinstatement of fear by introducing an unrelated aversive event (shock) after the fear had been reduced. The arousal manipulation successfully increased subjective arousal but not heartrate responsiveness. The increases in subjective arousal were not followed by increases in ROF, and the attempt to produce a reinstatement of fear did not succeed. A significant correlation between speed of fear-reduction and ROF was obtained.

Adult↗

PubMed1989

Fast, slow and sudden reductions in fear.

An experiment was carried out on 30 spider-fearful and 30 snake-fearful subjects in an attempt to replicate the finding of a correlation between the rapid reduction of fear and the reduced likelihood of significant fear returning after an interval (low return of fear). It was also hoped to observe and closely examine the occurrence of sudden and enduring reductions in fear. The results from the two groups of fearful subjects were reassuringly similar. The fears of both groups were significantly reduced in a relatively brief session, and small but significant returns of fear were observed after a 2 week interval, with the slow responders reporting a higher return of fear than fast responders. The time taken to reduce the fear correlated 0.36 with the return of fear. A minority of subjects did experience a subjectively important, abrupt change in their fears, these 'glass-jar' experiences were associated with faster (overall) reductions in fear, a lower return of fear, and subjective estimates of permanent and generalized reductions of the fear.

Arousal↗

PubMed1989

Predicting and remembering recurrent pain.

Two groups of Ss suffering from recurrent episodes of pain (headache or menstrual) were studied over a period of weeks in order to determine if they tend to over-predict aversive events (pain in this instance). The results are consistent with earlier findings on fear/pain. Contrary to earlier findings, however, after an under-predicted pain the menstrual Ss decreased their following prediction--suggesting the operation of a superordinate predictive pattern in this group. The Ss in both groups successfully predicted the qualities of their pain episodes, but tended to recall the episodes as being more painful than they had reported at the time of the pain episode. The explanation for the erroneous magnifications of predictions and reports of pain is not obvious. Over-predicting a potential pain, and remembering an episode as having been more painful than it was, may serve a protective function, but if so, these are not the most economical ways of achieving protection. The Ss who used medication expected to obtain moderate relief and they were not disappointed.

Adult↗

PubMed1989

The effect of induced mood on fear reduction.

The effect of mood on fear reduction was investigated in a laboratory study of fearful people. A musical mood-induction technique was utilized to induce either a happy mood or a sad mood in 84 female university students fearful of spiders or snakes. Following the mood induction, subjects' fears were reduced by participant modelling. Measures of subjective fear and self-efficacy were taken before and after mood induction, after modelling, and four weeks later. Compared to the induced sad-mood condition, induced happiness was followed by a decrease in subjective fear and greater self-efficacy. No difference was found in the length of time taken to reduce fear for happy and sad subjects. Fear reduction during a sad mood was associated with greater return of fear than fear reduction during a happy mood.

Adult↗

PubMed1988