Visuospatial memory impairments in cannabis users

P. Murphy, P. Erwin, L. Maciver, J. Fisk

Research output: Contribution to conferencePaper

Abstract

Background: This paper investigates the possibility, arising from previous findings from our laboratories, that cannabis consumption may make a separate contribution to visuospatial memory deficits from those related to ecstasy (MDMA) consumption. Method: Group was a between-participants independent variable at three levels; ecstasy and cannabis users (n = 11), cannabis users (n = 14), and controls (n = 14). Measures of self-reported substance use, IQ, mood, simple visuospatial span (ie. maintenance only), visuospatial working memory span (maintenance plus processing), and demographic variables were obtained. Results: Cannabis users who had not used ecstasy showed significant deficits in both simple visuospatial span and visuospatial working memory span compared to the other two groups. Whilst performing consistently worse than controls, deficits in relation to cannabis users who had also used ecstasy depended upon the selection of covariates. Conclusions: Deficits in simple visuospatial memory may be related to cannabis use, with differences in levels and patterns of its consumption between the two user groups possibly being responsible for these results. Lower ecstasy consumption than that reported by previous samples may have been responsible for the lack of a significant difference in visuospatial working memory performance compared to controls, in contrast to earlier findings.
Original languageEnglish
Publication statusPublished - 2005
EventBritish Psychological Society (BPS) Psychobiology Section Annual Scientific Meeting - Windermere, United Kingdom
Duration: 18 Sep 200620 Sep 2006

Conference

ConferenceBritish Psychological Society (BPS) Psychobiology Section Annual Scientific Meeting
CountryUnited Kingdom
CityWindermere
Period18/09/0620/09/06

Fingerprint Dive into the research topics of 'Visuospatial memory impairments in cannabis users'. Together they form a unique fingerprint.

  • Cite this

    Murphy, P., Erwin, P., Maciver, L., & Fisk, J. (2005). Visuospatial memory impairments in cannabis users. Paper presented at British Psychological Society (BPS) Psychobiology Section Annual Scientific Meeting, Windermere, United Kingdom.