Stereotype threat occurs when individuals, believed to be intellectually inferior, perform badly on cognitive tests they perceive to confirm stereotypes about them. Due to the wide media coverage of studies purporting to show cognitive deficits in ecstasy users it is possible that they experience stereotype threat. This study tested ecstasy and nonecstasy using polysubstance misusers on a variety of cognitive tests after they had been exposed to stereotype threat. This priming consisted of exposing them to information about the long-term effects of ecstasy which either stated that ecstasy caused memory loss or that it did not. Ecstasy users that had been primed that ecstasy did not cause cognitive deficits performed better than the other three groups on the delayed portion of the prose recall task from the Rivermead Behavioural Memory Test battery. There were no other statistically significant differences between any of the groups on any of the other cognitive tests used. This suggests that stereotype threat exists in ecstasy users and may be influencing their performance in experiments designed to identify cognitive deficits. In order to prevent this occurring in future studies, experimenters must be careful how they conduct their experiments and discuss their results with the media.

Aronson J , Fried C B , Good C ( 2002 ) Reducing the effects of stereotype threat on African American college students by shaping theories of intelligence . Journal of Experimental Social Psychology 38: 113 – 125

Google Scholar Crossref | ISI

Babor T F , Higgins-Biddle J C , Saunders J B , Monteiro M G ( 2001 ) The Alcohol Use Disorders Identification Test: Guidelines for use in primary care, 2nd edn. World Health Organization , Geneva .

Google Scholar

Bosson J K , Haymovitz E L , Pinel E C ( 2004 ) When saying and doing diverge: The effects of stereotype threat on self-reported versus nonverbal anxiety . Journal of Experimental Social Psychology 40: 247 – 255

Google Scholar Crossref | ISI

Cole J C , Sumnall H R ( 2003 ) Altered states: the clinical effects of ecstasy . Pharmacology and Therapeutics 98: 35 – 58

Google Scholar Crossref | Medline | ISI

Cole J , Sumnall H , Grob C ( 2002a ) Sorted: Ecstasy facts and fiction . The Psychologist 15: 464 – 474

Google Scholar

Cole J C , Sumnall H R , Wagstaff G F ( 2002b ) Methodological problems with ecstasy and the SCL-90 . Psychopharmacology 162: 215 – 217

Google Scholar Crossref | Medline | ISI

Cole J C , Sumnall H R , Wagstaff G F ( 2002c ) What is a dose of ecstasy? Journal of Psychopharmacology 16: 189 – 191

Google Scholar SAGE Journals | ISI

Cole J C , Bailey M , Sumnall H R , Wagstaff G F , King L A ( 2002d ) The content of ecstasy tablets: Implications for the study of their long-term effects . Addiction 97: 1531 – 1536

Google Scholar Crossref | Medline | ISI

Croizet J C , Claire T ( 1998 ) Extending the concept of stereotype threat to social class: The intellectual underperformance of students from low socioeconomic backgrounds . Personality and Social Psychology Bulletin 24: 588 – 594

Google Scholar SAGE Journals | ISI

Croizet J C , Després G , Gauzins M-E , Huguet P , Leyens J P , Méot A ( 2004 ) Stereotype threat undermines intellectual performance by triggering a disruptive mental load . Personality and Social Psychology Bulletin 30: 721 – 731

Google Scholar SAGE Journals | ISI

Curran H V ( 2000 ) Is MDMA (‘Ecstasy’) neurotoxic in humans? An overview of evidence and of methodological problems in research . Neuropsychobiology 42: 34 – 41

Google Scholar Crossref | Medline | ISI

Curran H V , Verheyden S L ( 2003 ) Altered response to tryptophan supplementation after long-term abstention from MDMA (ecstasy) is highly correlated with human memory function . Psychopharmacology 169: 91 – 103

Google Scholar Crossref | Medline | ISI

Dafters R I , Hoshi R , Talbot A C ( 2004 ) Contribution of cannabis and MDMA (‘ecstasy’) to cognitive changes in long-term polydrug users . Psychopharmacology 173: 405 – 410

Google Scholar Crossref | Medline

de la Torre R , Farré M ( 2004 ) Neurotoxicity of MDMA (ecstasy): The limitations of scaling from animals to humans . Trends in Pharmacological Sciences 25: 505 – 508

Google Scholar Crossref | Medline | ISI

Fisk J E , Montgomery C , Murphy P , Wareing M ( 2004 ) Evidence for executive deficits among users of MDMA (ecstasy) . British Journal of Psychology 95: 457 – 466

Google Scholar Crossref | Medline | ISI

Gamma A , Jerome I , Liechti M E , Sumnall H R ( 2005 ) Is ecstasy perceived to be safe? Drug and Alcohol Dependence 77: 185 – 193

Google Scholar Crossref | Medline | ISI

Gonzales P M , Blanton H , Williams K J ( 2002 ) The effects of stereotype threat and double-minority status on the test performance of Latino women . Personality and Social Psychology Bulletin 28: 659 – 670

Google Scholar SAGE Journals | ISI

Gossop M , Darke S , Griffiths P , Hando J , Powis B , Hall W , Strang J ( 1995 ) The Severity of Dependence Scale (SDS): Psychometric properties of the SDS in English and Australian samples of heroin, cocaine and amphetamine users . Addiction 90: 607 – 614

Google Scholar Crossref | Medline | ISI

Green A R ( 2004 ) MDMA: fact and fallacy, and the need to increase knowledge in both the scientific and popular press . Psychopharmacology 173: 231 – 233

Google Scholar Crossref | Medline | ISI

Heffernan T M , Jarvis H , Rodgers J , Scholey A B , Ling J ( 2001 ) Prospective memory, everyday cognitive failure and central executive function in recreational users of ecstasy . Human Psychopharmacology 16: 607 – 612

Google Scholar Crossref | Medline | ISI

Jaccard J , Wan C K ( 1996 ) LISREL approaches to interaction effects in multiple regression. Sage Publications , Thousand Oaks, CA

Google Scholar Crossref

Johnston M , Pollard B , Hennessey P ( 2000 ) Construct validation of the hospital anxiety and depression scale with clinical populations . Journal of Psychosomatic Research 48: 579 – 584

Google Scholar Crossref | Medline | ISI

Kish S J ( 2002 ) How strong is the evidence that brain serotonin neurons are damaged in human users of ecstasy? Pharmacology, Biochemistry and Behavior 71: 845 – 855

Google Scholar Crossref | Medline | ISI

Levy B ( 1996 ) Improving memory in old age through implict self-stereotyping . Journal of Personality and Social Psychology 71: 1092 – 1107

Google Scholar Crossref | Medline | ISI

MacKinnon D P , Geiselman R E , Woodward J A ( 1985 ) The effect of effort on stroop interference . Acta Psychologica 58: 225 – 235

Google Scholar Crossref | Medline | ISI

McCann U D , Ricaurte G A ( 2001 ) Caveat emptor: editors beware . Neuropsychopharmacology 24: 333 – 334

Google Scholar Crossref | Medline | ISI

Miller D B , O’Callaghan J P ( 1994 ) Environment, drug and stress induced alterations in body temperature affect the neurotoxicity of substituted amphetamines in the C57BL/6J mouse . Journal of Pharmacology and Experimental Therapeutics 270: 752 – 760

Google Scholar Medline | ISI

Morgan M J ( 1999 ) Memory deficits associated with recreational use of ‘ecstasy’ (MDMA) . Psychopharmacology 141: 30 – 36

Google Scholar Crossref | Medline | ISI

Morgan M J , McFie L , Fleetwood L H , Robinson J A ( 2002 ) Ecstasy (MDMA): are the psychological problems associated with its use reversed by prolonged abstinence? Psychopharmacology 159: 294 – 303

Google Scholar Crossref | Medline | ISI

Morley K C , Li K M , Hunt G E , Mallet P E , McGregor I S ( 2004 ) Cannabinoids prevent the acute hyperthermia and partially protect against the 5-HT depleting effects of MDMA (‘ecstasy’) in rats . Neuropharmacology 46: 954 – 965

Google Scholar Crossref | Medline | ISI

O’Loinsigh E D , Kelly J P , O’Boyle K M ( 2000 ) Co-administration of D-amphetamine alters the acute and long-term effects of 3,4-methylene dioxymethamphetamine in rats . British Journal of Pharmacology 131: 154P - 154P

Google Scholar ISI

O'shea E , Granados R , Esteban B , Colado M I , Green A R ( 1998 ) The relationship between the degree of neurodegeneration of rat brain 5-HT nerve terminals and the dose and frequency of administration of MDMA (‘ecstasy’) . Neuropharmacology 37: 919 – 926

Google Scholar Crossref | Medline | ISI

Parrott A C ( 2001 ) Human psychopharmacology of ecstasy (MDMA): a review of 15 years of empirical research . Human Psychopharmacology 16: 557 – 577

Google Scholar Crossref | Medline | ISI

Schmader T , Johns M ( 2003 ) Converging evidence that stereotype threat reduces working memory capacity . Journal of Personality and Social Psychology 85: 440 – 452

Google Scholar Crossref | Medline | ISI

Simon N G , Matticle R P ( 2002 ) The impact of regular ecstasy use on memory function . Addiction 97: 1523 – 1529

Google Scholar Crossref | Medline | ISI

Skinner H A ( 1982 ) The drug abuse screening test . Addictive Behaviors 7: 363 – 371

Google Scholar Crossref | Medline | ISI

Spencer S J , Steele C M , Quinn D M ( 1999 ) Stereotype threat and women's math performance . Journal of Experimental Social Psychology 35: 4 – 28

Google Scholar Crossref | ISI

Steele C M , Aronson J ( 1995 ) Stereotype threat and the intellectual test performance of African Americans . Journal of Personality and Social Psychology 69: 797 – 811

Google Scholar Crossref | Medline | ISI

Suhr J A , Gunstad J ( 2002 ) ‘Diagnosis threat’: The effect of negative expectations on cognitive performance in head injury . Journal of Clinical and Experimental Neuropsychology 24: 448 – 457

Google Scholar Crossref | Medline | ISI

Sumnall H R , Cole J C ( 2005 ) Self-reported depressive symptomatology in community samples of polysubstance misusers who report ecstasy use: a meta analysis . Journal of Psychopharmacology 19: 89 – 97

Google Scholar SAGE Journals | ISI

Sumnall H R , Tyler E , Wagstaff G F , Cole J C ( 2004 ) A behavioural economic analysis of alcohol, amphetamine, cocaine, and ecstasy purchases by polysubstance misusers . Drug and Alcohol Dependence 76: 93 – 99

Google Scholar Crossref | Medline | ISI

Swift W , Copeland J , Hall W ( 1998 ) Choosing a diagnostic cut-off for cannabis depdendence . Addiction 93: 1681 – 1692

Google Scholar Crossref | Medline | ISI

Thomasius R , Petersen K , Buchert R , Andresen B , Zapletalova P , Wartberg L , Nebeling B , Schmoldt A ( 2003 ) Mood, cognition and serotonin transporter availability in current and former ecstasy (MDMA) users . Psychopharmacology 167: 85 – 96

Google Scholar Crossref | Medline | ISI

Troyer A K , Moscovitch M , Winocur G , Alexander M P , Stuss D ( 1998 ) Clustering and switching on verbal fluency: the effects of focal frontal and temporal-lobe lesions . Neuropsychologia 36: 499 – 504

Google Scholar Crossref | Medline | ISI

Wechsler D ( 1981 ) WAIS-R manual. Psychological Corporation , New York

Google Scholar