Duration judgements in patients with schizophrenia
Elvevåg, Brita, McCormack, Teresa, Gilbert, A., Brown, G. D. A. (Gordon D. A.), Weinberger, Daniel R. (Daniel Roy) and Goldberg, Terry E.. (2003) Duration judgements in patients with schizophrenia. Psychological Medicine, Vol.33 (No.7). pp. 1249-1261. ISSN 0033-2917
WRAP_Elvevag_duration_judgements.pdf - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Official URL: http://dx.doi.org/10.1017/S0033291703008122
Background. The ability to encode time cues underlies many cognitive processes. In the light of schizophrenic patients' compromised cognitive abilities in a variety of domains, it is noteworthy that there are numerous reports of these patients displaying impaired timing abilities. However, the timing intervals that patients have been evaluated on in prior studies vary considerably in magnitude (e.g. 1 s, 1 min, 1 h etc.).
Method. In order to obviate differences in abilities in chronometric counting and place minimal demands on cognitive processing, we chose tasks that involve making judgements about brief durations of time (<1 s).
Results. On a temporal generalization task, patients were less accurate than controls at recognizing a standard duration. The performance of patients was also significantly different from controls on a temporal bisection task, in which participants categorized durations as short or long. Although time estimation may be closely intertwined with working memory, patients' working memory as measured by the digit span task did not correlate significantly with their performance on the duration judgement tasks. Moreover, lowered intelligence scores could not completely account for the findings.
Conclusions. We take these results to suggest that patients with schizophrenia are less accurate at estimating brief time periods. These deficits may reflect dysfunction of biopsychological timing processes.
|Item Type:||Journal Article|
|Subjects:||R Medicine > RB Pathology
B Philosophy. Psychology. Religion > BF Psychology
|Divisions:||Faculty of Science > Psychology|
|Library of Congress Subject Headings (LCSH):||Time perception -- Experiments, Schizophrenia -- Psychological aspects|
|Journal or Publication Title:||Psychological Medicine|
|Publisher:||Cambridge University Press|
|Official Date:||November 2003|
|Page Range:||pp. 1249-1261|
|Access rights to Published version:||Open Access|
|Funder:||Economic and Social Research Council (Great Britain) (ESRC), Biotechnology and Biological Sciences Research Council (Great Britain) (BBSRC)|
|Grant number:||88/S15050 (BBSRC), R000239002 (ESRC), R000239351 (ESRC)|
Allan, G. A. & Gibbon, J. (1991). Human bisection at the geometric mean. Learning and Motivation 22, 39–58.
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