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Carl A Roberts

4 papers in the library · 33 citations · publishing 2013-2020

Papers

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Perceived harm, motivations for use and subjective experiences of recreational psychedelic ‘magic’ mushroom use

Journal of Psychopharmacology July 17, 2020 Carl A Roberts, Isaac Osborne-Miller, Jon C. Cole et al. 33 citations

Background: Data on actual harm of magic mushrooms suggest that toxicity and abuse potential is low, however, their legal status suggests otherwise. We aimed to gauge perception of harm of magic mushrooms in both users and mushroom-naïve participants. We also aimed to observe differences in expectations of effects between users and mushroom-naïve participants, and whether motivations for use...

Recreational 3,4-methylenedioxymethamphetamine or 'ecstasy': Current perspective and future research prospects.

Journal of Psychopharmacology August 2017 Andrew C. Parrott, Luke A. Downey, Carl A Roberts et al.

The purpose of this article is to debate current understandings about the psychobiological effects of recreational 3,4-methylenedioxymethamphetamine (MDMA or 'ecstasy'), and recommend theoretically-driven topics for future research. Recent empirical findings, especially those from novel topic areas were reviewed. Potential causes for the high variance often found in group findings were also...

DOI: 10.1177/0269881117711922 (opens in new tab) Full text (opens in new tab) Ecstasy 3,4-methylenedioxymethamphetamine Central nervous system Cognition +3

Updating of working memory in ecstasy polydrug users: Findings from fNIRS.

Human Psychopharmacology: Clinical and Experimental May 2017 Catharine Montgomery, John E. Fisk, Carl A Roberts

Cognitive deficits are now well documented in ecstasy (MDMA) users with type and relative demand of task emerging as important factors. The updating component of executive processes appears to be particularly affected. The study reported here used functional near infrared spectroscopy imaging to investigate changes in cortical haemodynamics during memory updating. Twenty ecstasy users and 20...

Electrophysiological evidence of atypical processing underlying mental set shifting in ecstasy polydrug and polydrug users.

Experimental and Clinical Psychopharmacology December 2013 Carl A Roberts, Stephen H Fairclough, Francis P McGlone et al.

Executive functioning deficits are reported in ecstasy users. However research into mental set switching has been equivocal, with behavioral studies suggesting the function is preserved. The current study sought to address the issue of switching deficits in ecstasy users by combining behavioral performance with electrophysiological correlates (electroencephalography; EEG). Twenty ecstasy...