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Related Concept Videos

Self-Report Tests of Personality01:22

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Self-report inventories are objective personality assessments that use multiple-choice items or numbered scales, typically ranging from 1 (strongly disagree) to 5 (strongly agree). They are often called Likert scales after Rensis Likert. These inventories are widely used due to their ease of administration and cost-effectiveness. One of the most prominent examples is the Minnesota Multiphasic Personality Inventory (MMPI), initially developed in the 1940s to assess abnormal personality traits.
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Reliability and validity are two important considerations that must be made with any type of data collection. Reliability refers to the ability to consistently produce a given result. In the context of psychological research, this would mean that any instruments or tools used to collect data do so in consistent, reproducible ways.
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Related Experiment Video

Updated: Apr 5, 2026

Development of a Virtual Reality Assessment of Everyday Living Skills
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The Possibilities for Activity Scale (PActS): Development, validity, and reliability.

Mackenzi Pergolotti, Malcolm P Cutchin

    Canadian Journal of Occupational Therapy. Revue Canadienne D'Ergotherapie
    |August 19, 2015
    PubMed
    Summary

    The Possibilities for Activity Scale (PActS) effectively measures older adults

    Area of Science:

    • Gerontology
    • Occupational Therapy
    • Psychology

    Background:

    • Occupational possibilities represent older adults' perceived potential for meaningful activities.
    • Understanding these possibilities is crucial for promoting engagement and well-being in aging.

    Purpose of the Study:

    • To develop and validate the Possibilities for Activity Scale (PActS).
    • To measure older adults' perceived occupational possibilities.

    Main Methods:

    • A 14-item instrument was developed assessing activity expectations and activity self-efficacy.
    • The PActS was evaluated in a sample of 179 older adults diagnosed with cancer.

    Main Results:

    • The PActS demonstrated good internal consistency reliability (α = .77).

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  • The scale showed strong evidence of construct-related validity (r = .58), structural validity (CFI = .97, RMSEA = .05), and known-groups validity.

    • Conclusions:

    • The PActS is a reliable and valid measure for assessing internalized occupational possibilities in older adults with cancer.
    • This scale can improve the measurement of activity participation by capturing perceptions of occupational possibilities.