Imagination, Cognition and Personality
September 1, 1995
Peter L. Nelson
Although the Tellegen Absorption Scale has been widely employed in recent years as a measure of personality Trait Absorption, it is argued that this simple score does not sufficiently discriminate true capacity for Absorption nor does it reveal the level of opportunity made for absorptive experiencing. This study operationalizes Capacity and Opportunity as two additional subscales appended to...
Psychopharmacology
April 1995
R L Barrett, J L Wiley, R L Balster et al.
While many previous studies have shown that a variety of cannabinoids substitute and cross-substitute for delta 9-tetrahydrocannabinol (THC) in drug discrimination procedures, few have systematically examined potential THC-like effects of non-cannabinoid compounds. The purpose of the present study was to delineate further the pharmacological specificity of THC discrimination. Rats were trained...
Drug and Alcohol Dependence
December 1, 1994
S Yajnik, P Thapar, J L Lichtor et al.
An experiment using marijuana users and non-users was conducted to assess whether the reinforcing, subjective, or psychomotor effects of nitrous oxide were influenced by a subject's drug history. Subjects in the first four sessions sampled 40% nitrous oxide in oxygen and 100% oxygen (placebo), and then over the next three sessions, chose which agent they wished to inhale. Choice distributions...
Pharmacology, Biochemistry, and Behavior
November 1994
T H Kelly, Richard W Foltin, M T Mayr et al.
The effects of time of day and social context on daily patterns of marijuana self-administration were examined in two groups of three adult male marijuana smokers during a 12-day residential study. Days were divided into 6.5-h work and social-access periods. Order of occurrence (i.e., work before social access or social access before work) was counterbalanced between groups and reversed for...
Imagination, Cognition and Personality
September 1, 1994
Peter L. Nelson
This article argues that the so-called cannabis “amotivation syndrome,” widely reported in the literature, may not be a single nosological entity, but represent, instead, a change in cognitive style emerging as a result of cannabis's ability to facilitate a unique attentional state favoured by those who have a higher than average level of a personality factor referred to as “trait absorption.”...
Schizophrenia Research
September 1, 1994
Philip Mcguire, P Jones, I Harvey et al.
The Present State Examination was used to assess the psychopathology of 23 psychotic patients who were cannabis positive on urinary screening, and 46 matched drug-free controls. Cases and controls were indistinguishable in terms of psychopathology, DSMIII diagnoses, onset of recent illness, the proportion of first admissions, ethnicity, and socio-economic class, differing only in their...
Addiction
August 1, 1994
A N Chowdhury, N K Bera
Koro in the background of drug abuse is quite rare. The present report of Koro during the first experience with cannabis is the only account of its kind in the world Koro literature to date. The nature and extent of this genital depersonalization is discussed.
Indian Journal of Psychiatry
July 1, 1994
D. Basu, A. Malhotra, V. Varma
Association between cannabis use and various psychiatric syndromes does exist, but their nature remains elusive. Cannabis intoxication, ‘cannabis psychosis’ and certain other conditions related with cannabis use like flashbacks and prolonged depersonalization are discussed in this paper. The controversial nature of the cannabis - schizophrenia link is noted, and various methodological issues in...
The British Journal of Psychiatry
May 1994
M J Martinez-Arevalo, A Calcedo-Ordoñez, J R Varo-Prieto
Data were analysed from 62 schizophrenic patients between 18 and 30 years of age, treated at the community mental health centres in Navarra, who had relapsed and then completed a one-year follow-up study. Factors influencing the course of illness during follow-up were: continuing cannabis consumption; previous cannabis intake; non-compliance with treatment; and stress.
Pharmacology, Biochemistry, and Behavior
January 1994
Torbjörn U C Järbe, R Mechoulam, J Zahalka
The cannabimimetic activity of the two enantiomers of 11-hydroxy-delta-8-tetrahydrocannabinol (11-OH-delta-8-THC) was evaluated in pigeons trained to discriminate between the presence and absence of (-)-delta-9-tetrahydrocannabinol [(-)-delta-9-THC]. (-)-11-OH-Delta-8-THC exhibited cannabimimetic activity with a potency (ED50, 0.17 mg/kg) similar to that of delta-9-THC. The duration of action...