✦ LIBER ✦

Self reported sleep quality and cognitive performance in ecstasy users

✍ Scribed by Catharine Montgomery; John E. Fisk; Michelle Wareing; Philip Murphy

Publisher: John Wiley and Sons
Year: 2007
Tongue: English
Weight: 139 KB
Volume: 22
Category: Article
ISSN: 0885-6222
DOI: 10.1002/hup.879

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Objectives

Research suggests that ecstasy users exhibit psychobiological changes relative to nonusers such as altered sleep patterns and cognitive deficits. In turn, it has been suggested that sleep quality may be a mediator of such cognitive deficits in ecstasy users. The present study sought to investigate this proposed relationship.

Methods

Aspects of cognitive functioning in 104 ecstasy users and 103 nonusers obtained from our previous studies were reanalysed to explore the extent to which ecstasy‐related group differences were attributable to differences in sleep quality. Cognitive function was assessed via the computation span test, consonant updating, paired associate learning, syllogistic reasoning and word fluency. Sleep quality was measured via the Epworth Sleepiness Scale (ESS), and the Karolinska Sleepiness Scale (KSS).

Results

Ecstasy users performed worse than nonusers on all cognitive measures. While no differences were observed on the ESS, ecstasy users reported greater tiredness at the beginning of testing than nonusers. When the sleep variables were included as covariates, the effects of ecstasy on all cognitive measures remained significant.

Conclusions

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