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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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Disablement in the Physically Active Scale Short Form-8: psychometric evaluation.

Madeline P Casanova1, Megan C Nelson1, Michael A Pickering1

  • 1University of Idaho, 875 Perimeter Drive, Moscow, ID, 83844, USA.

BMC Sports Science, Medicine & Rehabilitation
|December 15, 2021
PubMed
Summary
This summary is machine-generated.

The Disablement in the Physically Active Scale Short Form-8 (DPA SF-8) is a valid, reliable, and responsive tool for assessing health in physically active individuals. This patient-reported outcome measure (PROM) is suitable for tracking changes over time and across groups.

Keywords:
Confirmatory factor analysisDisablementPatient reported outcome measuresQuality of life

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Area of Science:

  • Rehabilitation Science
  • Health Outcomes Research
  • Psychometrics

Background:

  • Patient-centered care and evidence-based practice necessitate reliable patient-reported outcome measures (PROMs).
  • Disablement is a key construct in patient care, particularly for the physically active population.
  • The Disablement in the Physically Active Scale Short Form-8 (DPA SF-8) requires further psychometric validation.

Purpose of the Study:

  • To validate the psychometric properties of the DPA SF-8.
  • To assess the reliability, internal consistency, and responsiveness of the DPA SF-8.
  • To establish the DPA SF-8's invariance across time and subgroups.

Main Methods:

  • Confirmatory factor analyses (CFAs) were used to evaluate the DPA SF-8's factor structure.
  • Reliability, internal consistency (Cronbach's alpha), and minimal detectable change (MDC) were calculated.
  • Minimal clinically important difference (MCID) and multi-group/longitudinal invariance testing were performed.

Main Results:

  • CFAs demonstrated excellent model fit across all time points.
  • The DPA SF-8 showed excellent reliability (ICC=.924) and acceptable internal consistency for its subscales.
  • MDC was 5.83, MCID was 2-3 points, and the scale was invariant across time and subgroups.

Conclusions:

  • The DPA SF-8 meets psychometric standards for validity, reliability, and responsiveness.
  • The scale is suitable for assessing patient improvement in the physically active population.
  • The DPA SF-8 can be used to detect differences between groups and changes over time.