The place of cooperation in the examination of neuropsychological impairment.
We examined the relationship between ratings of patient cooperation and neuropsychological test performance in a sample (N = 333) of dementing patients and normal controls. We also examined the stability of the relationship in a subset of this same sample (N = 299) who were retested a year later. All the correlation coefficients in both years were significant, with a median Pearson of.64 in year one and.725 in year two. The test-retest reliability for ratings of cooperativeness over the one-year time period (rated by different examiners) was also significant,r =.64 (p <.0001). This analysis indicates that cooperation plays a significant role in neuropsychological test performance and that ratings of cooperativeness are relatively stable over periods of up to a year in length.
Department of Psychology, Sunnybrook Medical Centre, Toronto, Ontario, Canada.
W G
WG
Snow
M C
MC
Tierney
M L
ML
Zorzitto
R H
RH
Fisher
D W
DW
Reid