This study assessed the reliability and validity of the Activities Checklist (Reid & Ziegler, 1981) as well as its utility for predicting cognitive functioning in the elderly. Data were drawn from two longitudinal projects where elderly subjects had been tested on two occasions approximately five years apart. Test-retest reliabilities were .54 and .43 for the larger (N = 158) and smaller (N = 76) samples respectively. Validity was demonstrated by an age shift towards more passive activities and by positive correlations with education, occupational status, health and well-being. Weighted versions of activity scores were not superior to unweighted versions as predictors of cognitive functioning. For both samples activity levels significantly predicted performance on some cognitive measures. It was concluded that the Activities Checklist is a potentially useful instrument to employ in the study of individual differences in cognitive aging.

Objectives: To examine the relationship between cognitive deficits, the duration of untreated psychosis (DUP) and positive and negative symptoms in a first episode psychosis sample.

Method: We assessed a consecutive sample of first episode psychosis participants from a catchment area service with a comprehensive neuropsychology battery, a family and service-user based measure of DUP and measures of symptomatology.

Results: Using correlations and stepwise linear regressions, we found strong relationships between measures of DUP and positive symptomatology. We found that positive and negative symptoms were associated with different time periods within DUP. However, we did not find evidence of a relationship between DUP and cognitive factors.

Conclusions: There was no evidence of a relationship between DUP and cognitive deterioration. However, there does appear to be evidence of a relationship between positive symptoms and aspects of DUP. These results highlight the importance of the heterogeneity of DUP and the potential to reduce positive symptoms through early intervention.