Divided attention performance in cannabis users and non-users following alcohol and cannabis separately and in combination (original) (raw)

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Abstract

The effect of Δ 9-tetrahydrocannabinol (Δ 9-THC) and alcohol, singly and in combination, on divided attention performance was investigated in cannabis users and non-users who were matched for alcohol use. Both cannabis and alcohol produced decrements in central and peripheral signal detections. Drug and alcohol effects were greater for signal presentations in the periphery. Cannabis users were less impaired in peripheral signal detection than non-users while intoxicated by cannabis and/or alcohol. These findings suggest the development of tolerance and cross-tolerance in regular cannabis users and/or the ability to compensate for intoxication effects.

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Authors and Affiliations

1. Middlexes Polytechnic, UK
   David F. Marks
2. University College London, UK
   David F. Marks
3. Directorate of the Drug Offensive, New South Wales Government, Australia
   Michael G. MacAvoy

Authors

1. David F. Marks
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2. Michael G. MacAvoy
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Marks, D.F., MacAvoy, M.G. Divided attention performance in cannabis users and non-users following alcohol and cannabis separately and in combination.Psychopharmacology 99, 397–401 (1989). https://doi.org/10.1007/BF00445566

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• Received: 22 February 1989
• Accepted: 06 March 1989
• Issue Date: November 1989
• DOI: https://doi.org/10.1007/BF00445566

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