Attentional bias in obsessional compulsive disorder

To date, studies of information processing in anxiety disorders have suggested that the latter are characterised by vigilance for threatening stimuli, possibly specific to personally relevant threat content. The present study represents an attempt to establish whether patients suffering from Obsessional Compulsive Disorder (OCD), generally classified as an anxiety disorder, show a similar cognitive bias. Thus, a replication of MacLeod, Mathews and Tata's (1986) study [Journal of Abnormal Psychology, 95, 15-20] is reported, employing modified materials of direct concern to the OCD subjects i.e. Contamination-related words. The results did indeed reveal content specific vigilance, whereby the OCD group were more vigilant for contamination content than mood-matched High Trait Anxious (HTA) controls, but the reverse was true for Social Anxiety words. Additionally, while a general threat interference effect was identified for both OCD and HTA subjects this was not content specific. A second experiment employing Low Trait Anxious subjects revealed no vigilance for threat nor any threat interference in this sample. The clinical implications and possible mechanism underlying these results are discussed.

Lack of cognitive recovery following withdrawal from long-term benzodiazepine use

Twenty-one patients with significant long-term therapeutic benzodiazepine (BZ) use, who remained abstinent at 6 months follow-up after successfully completing a standardized inpatient BZ withdrawal regime, and 21 normal controls matched for age and IQ but not for anxiety, were repeatedly tested on a simple battery of routine psychometric tests of cognitive function, pre- and post-withdrawal and at 6 months follow-up. The results demonstrated significant impairment in patients in verbal learning and memory, psychomotor, visuo-motor and visuo-conceptual abilities, compared with controls, at all three time points. Despite practice effects, no evidence of immediate recovery of cognitive function following BZ withdrawal was found. Modest recovery of certain deficits emerged at 6 months follow-up in the BZ group, but this remained significantly below the equivalent control performance. The implications of persisting cognitive deficits after withdrawal from long-term BZ use are discussed.

Violent behaviour and interpretative bias: an experimental study of the resolution of ambiguity in violent offenders

The present study used an information-processing approach to investigate differences in interpretation of sentences which were ambiguous for violent or neutral meaning across three groups of subjects: violent offenders, non-violent offender controls and a group of non-offender controls. Subjects were presented with unambiguous and ambiguous sentences. The ambiguous sentences were selected so that they could be interpreted in either a threatening or neutral manner. A recognition memory test indicated that both offender groups were more likely to interpret violent ambiguous sentences in a threatening fashion, with the opposite being shown by the non-offender group. This difference was found to be significant. A control condition suggested that the interpretative bias was specific to violent material and not a general anxiety response. Furthermore, the tendency to infer violent threat was found to correlate with hostility. The results are discussed in relation to cognitive theories of anger and aggression.

Different "types" of cigarette smokers received similar effects from smoking

In experiments with 22 women and with 26 men subjects, contrasted groups of so-called high-arousal situation smokers and low-arousal situation smokers did not differ in the increases in pulse rate and in letter cancellation speed shown after smoking the first cigarette of the day in a prescribed manner. Some implications are discussed.