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Validity of a performance assessment of activities of daily living for people with developmental disabilities
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Occupational Therapy.
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Occupational Therapy.
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation. Department of Occupational Therapy, Colorado State University. Fort Collins, Colorado.
2003 (English)In: Journal of Intellectual Disability Research, ISSN 0964-2633, E-ISSN 1365-2788, Vol. 47, no 8, 597-605 p.Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: Since clients with different types of developmental disabilities often experience difficulties in activities of daily living (ADL), it is critical that assessments of ADL are evaluated in order to ensure that one can make valid judgements based on the results of the appraisal. The purpose of the present study was to evaluate the validity of a specific performance assessment instrument, the Assessment of Motor and Process Skills (AMPS), when used by occupational therapists with clients with developmental disabilities. Unlike global ADL assessments, the AMPS is used not only to evaluate the level of ADL dependence, but also to estimate the quality of each specific action performed when a person is performing ADL tasks.

METHODS: Data were gathered from 1724 participants with different developmental disabilities, including intellectual disability (ID), cerebral palsy and spina bifida. Many-Facet Rasch (MFR) analysis was used to examine person-response validity, and task and item scale validity.

RESULTS: Goodness-of-fit statistics showed that the tasks and items had acceptable scale validity. The participants had acceptable person-response validity on the ADL motor scale, but had slightly lower than expected levels of person-response validity on the ADL process scale. The results indicate that clients with more severe forms of ID may have a higher proportion of different performance profiles in ADL than is expected by the MFR model of the AMPS. Since the proportion of participants who did not meet the criteria was only 3% lower than expected and in accordance with other studies, the difference may not be clinically meaningful. Otherwise, the results indicated that the AMPS is a valid tool when used with clients with developmental disabilities.

CONCLUSIONS: Further research is needed to evaluate the use of the AMPS in clinical assessment and intervention planning for this group of clients.

Place, publisher, year, edition, pages
Wiley-Blackwell, 2003. Vol. 47, no 8, 597-605 p.
Keyword [en]
activities of daily living, performance assessment
National Category
Occupational Therapy
Identifiers
URN: urn:nbn:se:umu:diva-81613DOI: 10.1046/j.1365-2788.2003.00475.xPubMedID: 14641807OAI: oai:DiVA.org:umu-81613DiVA: diva2:657161
Available from: 2013-10-18 Created: 2013-10-18 Last updated: 2017-12-06Bibliographically approved
In thesis
1. Occupation-based evaluation and intervention: validity of the assessment of motor and process skills when used with persons with mental retardation
Open this publication in new window or tab >>Occupation-based evaluation and intervention: validity of the assessment of motor and process skills when used with persons with mental retardation
2003 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The ability to perform everyday life occupations is a critical component in both evaluation and intervention for persons with mental retardation (MR). While the ability to perform personal and instrumental activities of daily living (ADL) has always been important for occupational therapy (OT) practice, there is an absence in OT literature and research with a focus on ADL and persons with MR. The overall aim of this thesis was to evaluate the validity of the Assessment of Motor and Process Skills (AMPS) for evaluation and intervention of ADL ability for persons with MR.

In order to evaluate the evidence of validity of the AMPS ability measures based on relation to level of MR, two groups of participants with MR were evaluated with the AMPS (,#=22; #= 39). The results indicated expected moderate relationships between ADL motor and ADL process ability measures and level of MR, despite different methods used for evaluating level of MR. The results also indicated that the results of the AMPS evaluation could be used to directly describe and measure the consequences in performance of ADL tasks for persons with different levels of MR.

The evidence of validity of the AMPS was further examined in a study including participants with different types of developmental disabilities (e.g., MR, cerebral palsy, spina bifida) (#=1724). An application of many-faceted Rasch analysis was used to examine goodness-of-fit of the responses for the tasks, skill items, and participants included in the study. All tasks and all items except one demonstrated acceptable goodness-of-fit to the model on the ADL motor and ADL process scales. An expected proportion of participants demonstrated acceptable goodness-of-fit on the ADL motor scale. On the ADL process scale, a slightly lower proportion of participants than expected demonstrated acceptable goodness-of-fit. The results indicated further that persons with more severe levels of MR and persons with more limited ADL process abilities demonstrated different response patterns across tasks and possibly items.

The evidence of validity of the internal structure of the AMPS scales was also evaluated between persons with mild and moderate MR (#=178; #=170). Group specific ADL motor and ADL process skill item hierarchies were generated using many-faceted Rasch analyses and compared. The hierarchies of ADL motor and ADL process skill items remained stable across groups, indicating evidence of validity of the AMPS scales when used to evaluate persons with MR. The results also indicated that although participants with moderate MR demonstrated overall lower mean ADL motor and ADL process ability, they did perform some specific ADL motor and ADL process skills at a similar level as persons with mild MR.

Finally, the utility of the AMPS ability measures for detecting change were examined in an intervention study including three female participants with moderate MR. The study was based on a single case design and evaluated the effectiveness of a structured occupational therapy intervention program. Improvements were found for the participants in relation to the implementation of the program, but the pattern of changes were different between the participants and across the dependent variables. ADL process ability was the only variable that improved across all participants. The results supported the ADL process abilities as sensitive measures for detecting changes in ADL ability of persons with MR.

In conclusion, the results of these studies contribute to the evidence of validity of the AMPS ability measures and scales, specifically in relation to the evaluation of persons with MR. The finding that an OT program resulted in improved ADL process ability also suggest that the results of the AMPS can be used to plan as well as evaluate outcomes of OT practice. Further research is also suggested in order to improve validity evidence and utility of the AMPS when used with persons with MR.

Place, publisher, year, edition, pages
Umeå: Umeå Universitet, 2003. 83 p.
Series
Umeå University medical dissertations, ISSN 0346-6612 ; 836
Keyword
Mental retardation, intellectual disability, developmental disabilities, occupational therapy, activities of daily living, ADL assessment, performance skills, occupational performance, Many- faceted Rasch measurement, single case design
National Category
Occupational Therapy
Identifiers
urn:nbn:se:umu:diva-94111 (URN)91-7305-438-0 (ISBN)
Public defence
, Umeå universitet, Umeå
Supervisors
Note

Diss. (sammanfattning) Umeå : Umeå universitet, 2003

Available from: 2014-11-14 Created: 2014-10-03 Last updated: 2014-11-14Bibliographically approved

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Kottorp, AndersBernspång, BirgittaFisher, Anne G.
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