Administration and Scoring
An AMPS observation begins with an occupational therapy interview of the client so that the occupational therapist can determine who is the client (e.g., a person, a client constellation, or a client group), what are the client’s concerns with occupational performance, and if any of those concerns pertain to ADL task performance.
If ADL task performances are an area of concern, the occupational therapist proceeds to determine if the ADL tasks that are presenting a challenge to the person and are prioritized for further evaluation are similar to the over 120 standardized ADL tasks that are included in the AMPS.
After relevant ADL tasks from the AMPS are identified, the person is fully familiarized with the task environment and a final task contract is established. More specifically, each ADL task included in the AMPS allows for the person to perform the task in his or her usual manner and in accordance with the variety of ways people perform similar ADL tasks in difference world regions and cultural contexts. Finalizing the task contract, therefore, involves a process where the occupational therapist and the person agree on which task options will apply to the person who is to be observed, given his or her cultural context.
The person performs each prioritized and self-chosen ADL task in a familiar environment and the way he or she usually does it.
After completion of each AMPS task observation, the occupational therapist scores the person’s quality of performance on each of 16 ADL motor and 20 ADL process items (i.e., occupational performance skills) according to the standardized criteria in the AMPS manual. Each task performance observed is scored separately and each ADL skill is rated using a 4-point ordinal scale.
Once the evaluation is complete, the therapist enters the raw scores for each ADL task observed into the OTAP Software. The OTAP Software is then used to perform many-facet Rasch analyses of the person’s ordinal raw items scores and generate linear quality of ADL task performance measures (i.e., one for ADL motor ability and one for ADL process ability). The many-facet Rasch computation done by the OTAP Software considers the person’s raw scores for all of the ADL tasks the person performed, the challenges of those tasks, and the severity of the occupational therapist who scored the person’s performances.
The occupational therapist can also use the OTAP software to generate reports that assist with analysis of a person’s overall ADL ability measures, need for occupational therapy services, intervention planning, and interpretation of the significance of any change in ADL ability after re-evaluation.