Validation of an independent living scale for post-acute rehabilitation applications.
The Independent Living Scale (ILS) was developed in a post-acute traumatic brain injury (TBI) rehabilitation facility over a 15-year period to assess three main areas: (1) activities of daily living, (2) behaviour, and (3) initiation. The purpose of this study was to examine the psychometric properties of the ILS, including test--retest stability, construct validity, and statistical fit. Statistical analysis was completed on all weekly scores between the years 1986-1995 (n = 5250). A previous study showed ILS inter-rater reliability to be 0.85 and convergent validity 0.82--0.87. This study demonstrated a test--retest stability of 0.72, the Kaiser-Meyer-Olkin Measure of Sampling Adequacy 0.94 (marvelous), and a Bartlett Test of Sphericity result of 'scale items independent'. The ILS was shown to have good construct validity, inter-rater reliability, internal consistency, instrument stability, and convergent validity.
Ashley
M J
MJ
Centre for Neuro Skills, Bakersfield, CA 93306, USA. mjashley@neuroskills.com
Persel
C S
CS
Clark
M C
MC
D000203:Activities of Daily Living; D000328:Adult; D001519:Behavior; D001930:Brain Injuries / Q000523:psychology / Q000534:rehabilitation*; D005260:Female; D006801:Humans; D008297:Male; D011237:Predictive Value of Tests; D011594:Psychometrics; D011788:Quality of Life; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D011795:Surveys and Questionnaires