The construct validity of the Dutch version of the activity card sort

Abstract

Purpose: Establishing construct validity of the ACS-NL in individuals with Parkinson’s disease (PD).

Method: Discriminative validity was established in 191 community-dwelling individuals with PD using an extreme groups design (Hoehn and Yahr stages 1 and 3). Convergent validity was determined by relating the performance scores of the ACS-NL to the scores of the Canadian Occupational Performance Measure (COPM) and the Parkinson’s Disease Questionnaire (PDQ-39) scores, and relating ACS-NL satisfaction scores to the COPM scores and to the Utrecht Scale for Evaluation of Rehabilitation Participation (USER-P).

Results: The ACS-NL discriminated between individuals with PD with H&Y stages 1 and 3 (U = 524.5, Z = −5.453). ACS-NL performance scores correlated weakly with COPM scores (r = (0).19) and moderately with PDQ-39 scores (r = 0.44–0.55). The ACS-NL satisfaction scores correlated weakly with COPM scores (r = 0.23), and moderately with USER-P scores (r ≥ 0.40).

Conclusions: This study contributed to the validation of the ACS-NL. The assessment enhances the possibility of monitoring participation in activities in individuals with PD.

Implications for Rehabilitation

• The ACS-NL appears to hold good potential for use in the assessment of participation in activities in individuals with PD.

• The ACS-NL has added value parallel to administration of other instruments measuring participation (COPM) and quality of life (PDQ-39).

• This study demonstrates the capacity of the ACS to measure a unique construct of participation and helps to improve the psychometric properties and administration of the ACS-NL in practice.

Keywords:

• ACS
• activity
• ICF
• occupational therapy
• Parkinson’s disease
• participation

Acknowledgements

The authors would like to acknowledge Professor Carolyn Baum, the original author of the ACS, for granting permission to develop the Dutch version. We thank the Department of Rehabilitation, Radboud University Medical Centre, for providing and sharing the OTiP database from which to extract ACS-NL data. We would like to thank Tiska Ikking and Yvonne Veenhuizen, the research assistants, for their contribution to the data collection and Mark Scheper for his statistical assistance. Finally, we would like to thank all participating individuals with PD and their caregivers.

Declaration of interest

The authors report no declarations of interest.