Psychological Medicine
2003
Helene Verdoux, C. Gindre, F. Sorbara et al.
Background. Epidemiological findings suggest that cannabis use is a risk factor for the emergence of psychosis, and that the induction of psychotic symptoms in the context of cannabis use may be associated with a pre-existing vulnerability for psychosis. This study investigated in a non-clinical population the interaction between cannabis use and psychosis vulnerability in their effects on...
Psychological Medicine
December 23, 2002
Louisa Degenhardt
34 citations
The issue of whether an association exists between cannabis and psychosis exists, and why, has received considerable attention in recent years (Hall, 1998; Mueser et al. 1998; Blanchard et al. 2000; Degenhardt & Hall, 2002). There are probably a number of reasons for the sustained interest. First, psychotic disorders such as schizophrenia are often chronic or recurring (Mason et al. 1996), are...
Psychological Medicine
May 1, 2001
Sarajane Bhattachary, Jane H. Powell
138 citations
Background. It has recently been shown that 3,4-methylenedioxymethamphetamine (MDMA) or ‘ecstasy’ causes long-lasting alterations to brain structure and function in animals, and there is mounting evidence that recreational users of the drug show impairments in some aspects of cognitive functioning including memory for verbal information. The present study investigates possible effects on other...
Psychological Medicine
January 1996
T H Nayani, A S David
A comprehensive semi-structured questionnaire was administered to 100 psychotic patients who had experienced auditory hallucinations. The aim was to extend the phenomenology of the hallucination into areas of both form and content and also to guide future theoretical development. All subjects heard 'voices' talking to or about them. The location of the voice, its characteristics and the nature...
Psychological Medicine
August 1, 1992
John Smythies
9 citations
Neurophilosophy is Patricia Churchland's (1986) hypothesis that the mind-brain 'problem' and related 'problems' such as those surrounding perception and cognition will be solved by advances in cognitive neuroscience.This entails that the attempts by philosophers to solve these problems by their methods of purely logical, conceptual and linguistic analysis are doomed to failure as they represent...
Psychological Medicine
May 1, 1981
R Littlewood, M Lipsedge
A prospective study of patients with religious delusions identified 24 West Indian and West African patients. Those who had none of Schneider's first-rank symptoms of schizophrenia (principally West Indians) differed from those who did by virtue of early religious commitment, life-long religious experiences, an acute admission precipitated by social events, a greater chance of having their...
Psychological Medicine
May 1, 1980
Michael A. West
SYNOPSISPrevious research on meditation and the EEG is described, and findings relating to EEG patterns during meditation are discussed. Comparisons of meditation with other altered states are reviewed and it is concluded that, on the basis of existing EEG evidence, there is some reason for differentiating between meditation and drowsing. Research on alpha-blocking and habituation of the...
Psychological Medicine
May 1, 1978
M L Gentil, M Lader
Twenty female anxious neurotic patients were compared with 25 normal female volunteers, divided into a low anxious normal and a high anxious group, with respect to dream report content. Dream reports were analysed using an objective and reliable method and were correlated with the day-time attitudes of the subjects measured by Semantic Differential techniques. Anxiety levels influenced both...
Psychological Medicine
May 1, 1977
Jean-Michel Gaillard, Marc Phelippeau
10 citations
The study was undertaken in order to test a dream-rating scale and to propose some modifications, especially for use in laboratory situations where the effect of a given experimental factor is to be assessed on mental activity in sleep. Dreams collected from normal subjects under EEG monitoring were analysed in detail in order to establish definitions for each rating point of each dimension of...