G. Kerkhoff et al., ASSESSMENT OF VISUAL-SPATIAL PERCEPTION (VS) IN BRAIN-DAMAGED PATIENTS - INVESTIGATIONS OF OBJECTIVITY, RETEST RELIABILITY AND VALIDITY, Nervenarzt, 65(10), 1994, pp. 689-695
Retest reliability and validity of a computational method (VS, [19]) f
or the analysis of visual spatial perception in brain damaged patients
was investigated. Retest reliability was tested in 20 patients (retes
t interval: 1 week; range: 1-3) and varied from r=0.65-0.95 for the di
fferent subtests for the ''point of subjective equality'' and r=0.39-0
.89 for the ''interval of uncertainty''. In the several investigations
concerning the validity of VS. 234 patients and 10 normal subjects pa
rticipated. In the first place, we found si,gnificant relationships of
some of the subtests of VS to similar visual-spatial tests, but no re
lationship to tests of visual object perception. Secondly, we found si
gnificant relationships to certain tasks which approximated daily func
tioning. In summary, the present results demonstrate the objectivity,
retest-reliability and validity of VS in brain damaged patients.