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Schizotypal traits impact upon executive working memory and aspects of IQ.
Psychiatry Res. 2008 May 30; 159(1-2):207-14.PR

Abstract

Previous inconsistent findings concerning a link between working memory dysfunction and negative aspects of non-clinical schizotypy have been interpreted to cast doubt on the continuity model of 'negative psychosis-proneness'. This study employed the Letter-Number-Sequencing (LNS) task and the Trail-Making Test to assess more demanding, executive working memory. A secondary concern was to rule out possible mediating effects of familial schizophrenia. It was hypothesised that executive working memory impairment would be associated primarily with negative rather than positive schizotypy even in the absence of familial schizophrenia. Matrix reasoning controlled for IQ. In 87 university-student participants with no known family history of schizophrenia, lower LNS scores were associated with higher levels of negative and positive schizotypy traits. Counter to expectations, matrix reasoning scores were also associated with schizotypy, primarily the cognitive/perceptual traits. Results were similar when participants with a known family history of schizophrenia (10) were included (N=97). Findings support the view that impairment of executive working memory (indexed by LNS) is a reliable cognitive marker for negative (and perhaps also positive) schizophrenia vulnerability, independent of familial schizophrenia, and provide the first indication that some facets of IQ (e.g. inductive reasoning) might also be compromised in non-clinical schizotypy.

Authors+Show Affiliations

Department of Psychology, Macquarie University, Sydney NSW 2109, Australia.No affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

18423612

Citation

Matheson, Sandra, and Robyn Langdon. "Schizotypal Traits Impact Upon Executive Working Memory and Aspects of IQ." Psychiatry Research, vol. 159, no. 1-2, 2008, pp. 207-14.
Matheson S, Langdon R. Schizotypal traits impact upon executive working memory and aspects of IQ. Psychiatry Res. 2008;159(1-2):207-14.
Matheson, S., & Langdon, R. (2008). Schizotypal traits impact upon executive working memory and aspects of IQ. Psychiatry Research, 159(1-2), 207-14. https://doi.org/10.1016/j.psychres.2007.04.006
Matheson S, Langdon R. Schizotypal Traits Impact Upon Executive Working Memory and Aspects of IQ. Psychiatry Res. 2008 May 30;159(1-2):207-14. PubMed PMID: 18423612.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Schizotypal traits impact upon executive working memory and aspects of IQ. AU - Matheson,Sandra, AU - Langdon,Robyn, Y1 - 2008/04/18/ PY - 2006/06/14/received PY - 2006/10/15/revised PY - 2007/04/07/accepted PY - 2008/4/22/pubmed PY - 2008/7/26/medline PY - 2008/4/22/entrez SP - 207 EP - 14 JF - Psychiatry research JO - Psychiatry Res VL - 159 IS - 1-2 N2 - Previous inconsistent findings concerning a link between working memory dysfunction and negative aspects of non-clinical schizotypy have been interpreted to cast doubt on the continuity model of 'negative psychosis-proneness'. This study employed the Letter-Number-Sequencing (LNS) task and the Trail-Making Test to assess more demanding, executive working memory. A secondary concern was to rule out possible mediating effects of familial schizophrenia. It was hypothesised that executive working memory impairment would be associated primarily with negative rather than positive schizotypy even in the absence of familial schizophrenia. Matrix reasoning controlled for IQ. In 87 university-student participants with no known family history of schizophrenia, lower LNS scores were associated with higher levels of negative and positive schizotypy traits. Counter to expectations, matrix reasoning scores were also associated with schizotypy, primarily the cognitive/perceptual traits. Results were similar when participants with a known family history of schizophrenia (10) were included (N=97). Findings support the view that impairment of executive working memory (indexed by LNS) is a reliable cognitive marker for negative (and perhaps also positive) schizophrenia vulnerability, independent of familial schizophrenia, and provide the first indication that some facets of IQ (e.g. inductive reasoning) might also be compromised in non-clinical schizotypy. SN - 0165-1781 UR - https://www.unboundmedicine.com/medline/citation/18423612/Schizotypal_traits_impact_upon_executive_working_memory_and_aspects_of_IQ_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0165-1781(07)00118-7 DB - PRIME DP - Unbound Medicine ER -