Individually Prioritized Problem Assessment

Abstract

The Individually Prioritized Problem Assessment (IPPA) is a client-centered measurement instrument designed to evaluate the effectiveness of providing an assistive device or technology. The instrument assesses the degree to which functional problems identified during daily activities are resolved following the provision of the aid. The methodology employs two structured interviews: one conducted prior to the intervention (baseline) and a follow-up interview conducted several months afterward. During the interview, the client independently identifies and prioritizes specific functional difficulties they experience.

Keywords

Assistive Technology, Rehabilitation, Outcome Measurement, Daily Living Activities, Client-centered assessment, Problem Resolution, Occupational Therapy, Functional Impairment.

Authors

Wessels RD, et al. (2000)

Purpose

The primary purpose of the IPPA is to quantify the individual outcome of providing assistive devices. It serves as a crucial tool in rehabilitation and occupational therapy settings to provide evidence-based assessment of whether the intervention successfully mitigated or eliminated the patient’s self-reported functional limitations.

The scale shifts the focus from standardized functional scores to personalized goals, ensuring that the measurement of success is defined by the client’s own priorities and experiences regarding their daily activities and challenges.

Construct

The IPPA primarily measures the construct of perceived functional improvement and problem resolution. It operates on the principle of a highly client-centered assessment, where the individual’s subjective experience of a problem and its resolution is the core metric. The scale does not measure a latent psychological trait but rather the functional impact of an external factor (the assistive device) on the individual’s ability to perform necessary daily tasks.

The instrument guides the client to identify problems within standardized functional domains, but the actual problems prioritized are unique to the individual, making the measure highly sensitive to personalized outcomes.

Validity

The IPPA demonstrates strong face validity and content validity, particularly within the context of occupational therapy and assistive technology provision, because the items used for assessment are directly derived from the client’s reported daily difficulties. This alignment ensures that the instrument measures what it purports to measure: the resolution of prioritized problems.

While specific quantitative validity studies (e.g., convergent or discriminant validity with other standardized measures) are essential for academic rigor, the IPPA’s utility lies in its clinical relevance as an individualized outcome measure, rather than its correlation with broad standardized functional scales.

Reliability

Assessing the reliability of individualized outcome measures like the IPPA presents unique challenges compared to standard psychometric instruments. Traditional test-retest reliability may be difficult to establish, as the specific problems prioritized at baseline are expected to change (resolve) by the follow-up assessment.

However, reliability in the IPPA context is maintained through the structured interview protocol and the standardized checklist domains. This structure ensures that the process of problem identification and the subsequent scoring of resolution are consistent across different assessors and time points, focusing on the reliability of the measurement procedure itself.

Factor Analysis

The IPPA is not typically subjected to traditional factor analysis. Factor analysis is generally employed to identify underlying latent variables or clusters within a large set of items that measure a common psychological trait. The IPPA, conversely, is an individualized, criterion-referenced measure where the items (the specific problems) are unique to each participant and the score reflects success criteria rather than a position on a continuum of a latent trait.

Instrument

Test Type: Outcome Measure, Questionnaire, Structured Interview Checklist

Format: Pre- and Post-Intervention Assessment using a structured interview protocol.

Language Available: Dutch (Original), English.

Population Group: Adults, Older Adults.

Age Group: 18 years and older.

Population Details: Individuals experiencing functional impairment who are candidates for, or recipients of, assistive technology or rehabilitation services.

Test Methodology: The assessment involves two interviews. The first interview establishes a baseline where the client uses a checklist across predefined domains to identify up to five most pressing daily activity problems. The second interview, conducted several months post-intervention, scores the extent to which these prioritized problems have been solved or mitigated by the assistive device.

Keywords

Wessels RD, Assistive Technology Outcome, Functional Independence, Problem Assessment, Daily Activity Checklist, Psychometric properties.

Authors

Author ORCID Identifier: N/A (Not provided in source material)

Affiliation Email addresses: N/A (Not provided in source material)

Correspondence Address: N/A (Not provided in source material)

Permissions & Fee and Test Year

The IPPA was developed and published by Wessels RD, et al. in 2000. Permissions for use, licensing fees, and access to the complete scoring manual should be sought from the original authors or the holding academic institution, as standard for copyrighted academic scales.

Reference’s

Wessels RD, et al. (2000). The Individually Prioritized Problem Assessment (IPPA): Development and initial evaluation of an outcome measure for assistive technology provision. [Specific journal citation required for full reference].

Items of the Individually Prioritized Problem Assessment

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.

The checklist of the IPPA provides examples of activities that cause problems in daily life across the following domains:

• persoonlijke verzorging (personal care)
• mobiliteit (mobility)
• vervoer (transport)
• huishoudelijk werk (household work)
• veiligheid (safety)
• communicatie (communication)
• ontspanning (relaxation)

The English version and checklist also contain the domains: ‘leisure’ (vrije tijdsbesteding) and ‘role activities’.

The original PDF forms for the IPPA are available here:

• Toelichtingsformulier (Explanation Form): https://scales.arabpsychology.com/wp-content/uploads/instrumenten/IPPA-form.pdf
• Meetinstrument (Instrument): https://scales.arabpsychology.com/wp-content/uploads/instrumenten/IPPA-basisvervolg-meetinstr.pdf
• Handleiding (Manual): https://scales.arabpsychology.com/wp-content/uploads/instrumenten/IPPA-basisvervolg-handl.pdf