Investigation of cognition in schizophrenia: psychometric properties of instruments for assessing working memory updating

Jornal Brasileiro de Psiquiatria

Arthur A. Berberian¹  Ary Gadelha¹  Natália M. Dias¹  Tatiana P. Mecca¹  Rodrigo A. Bressan¹  Acioly T. Lacerda¹ 

关键词: Cognition;    working memory;    updating;    schizophrenia;    neuropsychology;    Cognição;    memória de trabalho;    atualização;    esquizofrenia;    neuropsicologia;   

DOI  :  10.1590/0047-2085000000084

来源: SciELO

【 摘 要 】

ObjectiveThis study describes the development of two updating measures of working memory (WM): Letter Updating Test (LUT) and Word Updating Test (WUT).MethodsIn stage 1, items were created and the instruments were assessed by experts and laymen. In stage 2, tests were given to 15 patients with schizophrenia and 15 paired controls. All were able to understand and respond to the instruments. In stage 3, 141 patients with schizophrenia and 119 healthy controls aged 18 to 60 took part; they were assessed on WM, processing speed (PS) and functional outcome.ResultsThe results showed adequate rates of internal consistency for both measures developed, for both the total sample and each group separately, as well as evidence of convergent validity, discriminant validity and sensitivity to differentiate performance among the groups. Principal component analysis yielded two components, one for updating tests and other for PS measures, indicating factorial validity. Positive and significant, yet low, correlations were found with functionality measures.ConclusionThese results provide adequate psychometric parameters for the measures developed, applicable to cognitive research settings in schizophrenia.

【 授权许可】

CC BY   
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