Reports regarding the effects of chronic drug use on human cognition and comparisons of
different drug user groups have been inconsistent. Methodological flaws may account for …

This article exemplifies the major difficulties inherent in carrying out and interpreting human
drug research. The information available about the long-term consequences of opiate use …

The purpose of this study was to examine the latent structure of neuropsychological abilities
of drug-abusing patients. Four factors were identified in an exploratory factor analysis (N …

• The long-term neuropsychological effects of persistent nonmedical drug use are still
unknown. In this study, 22 young men, all extensive" polydrug" users, were examined while …

Introduction Alcohol, tobacco, and illegal drug usage is pervasive throughout the world, and
abuse of these substances is a major contributor to the global disease burden. Many …

Abstract reviews the evidence of various relationships between drug consumption and
behavior, with particular reference to the long-term neurobehavioral impact of drug …

Impairments of human cognition and learning following chronic marijuana use are of serious
concern, but have not been clearly demonstrated. To determine whether such impairments …

BACKGROUND: Stimulants are used increasingly to enhance social (cocaine) or cognitive
performance (stimulants normally prescribed, prescription stimulants [eg, methylphenidate …

Some abused drugs have been reported to alter performance on naturalistic tasks such as
driving and also on laboratory tasks. The performance effects of several drug classes were …

Drug abuse impacts neuropsychological functioning both directly by altering
neurochemistry, and indirectly by means of non-neurological systems [1]. Certainly drugs …