The Perceive, Recall, Plan and Perform (PRPP) system for persons with Parkinson’s disease: a psychometric study
Sammanfattning
Background: The Perceive, Recall, Plan & Perform (PRPP) system of task analysis might be feasible
to evaluate occupational performance and information processing strategies for persons
with Parkinson’s disease (PD).
Aim: To evaluate: (1) the random error between raters (inter-rater study), (2) the random error
within raters (intra-rater study), and (3) the internal consistency of the PRPP.
Materials and methods: (1) video-recorded performance of meaningful activities of 13 Dutch
persons with PD, scored independently by 38 Dutch PRPP trained occupational therapists were
included in the analysis. The random error between raters was analyzed with two-way random
Intraclass Correlation Coefficients (ICC). (2) Four videos were scored twice by 30 raters (6 week
time interval). The random error within raters was analyzed using one-way random ICC’s.
(3) Internal consistency study: data of 190 persons with PD were analyzed using Cronbach’s
alpha (a).
Results: Inter-rater reliability ranged from slight to moderate (ICC¼ 0.06–0.43). The mean intrarater
reliability ranged from moderate to almost perfect (ICC¼ 0.60–0.83). Internal consistency is
good (a ¼ 0.60–0.86).
Conclusion: The limited inter-rater reliability but adequate intra-rater reliability and internal consistency
show the feasibility of the PRPP when used for persons with PD. Implications for reliable
clinical use are discussed.