title: Construct and ecological validity of the Occupational Therapy Adult Perceptual Screening Test (OT-APST).
abstract: This paper reports on the construct validity (scale design and convergent validity) and ecological validity of the Occupational Therapy Adult Perceptual Screening Test (OT-APST). The performance of 208 participants following stroke on the OT-APST and a reference tool (either the Loewenstein Occupational Therapy Cognitive Assessment (LOTCA) or the LOTCA-Geriatric version (LOTCA-G)) was compared. The OT-APST performance of the stroke sample was compared with a healthy normative sample (n = 356). The relationship between the OT-APST performance and the Functional Independence Measure (FIM) score of the participants following stroke was also examined. Factor analysis and internal consistency results supported the scale design of the OT-APST. Significant correlations between the performance of the participants following stroke on the OT-APST and the reference tool supported the convergent validity of the OT-APST. The ability of the OT-APST to separate the two participant groups provided further evidence of its construct validity. Significant correlations between OT-APST and FIM scores supported the ecological validity of this tool. This study shows that the OT-APST is an ecologically valid tool with demonstrated construct validity in the assessment of visual perception.
authors.affiliation: Division of Occupational Therapy, School of Health and Rehabilitation Sciences, University of Queensland, Brisbane, Australia. deecooke@powerup.com.au
authors.forename: Deirdre M
authors.initials: DM
authors.lastname: Cooke
authors.forename: Kryss
authors.initials: K
authors.lastname: McKenna
authors.forename: Jennifer
authors.initials: J
authors.lastname: Fleming
authors.forename: Ross
authors.initials: R
authors.lastname: Darnell
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001072:Apraxias / Q000175:diagnosis* / Q000209:etiology; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D009788:Occupational Therapy; D010468:Perceptual Disorders / Q000175:diagnosis* / Q000209:etiology; D011594:Psychometrics; D011793:Queensland; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D020521:Stroke / Q000150:complications; D014796:Visual Perception