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Evaluation in Ayres Sensory Integration® Praxis Tests: Construct Validity and Internal Reliability.

Zoe Mailloux1, Patricia Grady-Dominguez2, Anita Bundy3

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This study validates four new praxis tests for children, showing they are reliable and accurately differentiate between children with and without sensory integration difficulties. These findings support their use in occupational therapy.

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Area of Science:

  • Occupational therapy
  • Developmental psychology
  • Psychometrics

Background:

  • Assessing praxis is crucial for understanding occupational participation.
  • Valid and reliable measures are needed for accurate praxis assessment.

Purpose of the Study:

  • To evaluate the construct validity and internal reliability of four new praxis tests.
  • To determine if the tests can differentiate between children with and without sensory integration difficulties.

Main Methods:

  • Comparative descriptive design involving 163 children in a control group and 145 children in a case group (ages 3-12).
  • Data collected from homes, schools, and therapy practices across the United States.
  • Rasch analyses for construct validity and Student's t tests for group differences.

Main Results:

  • The four praxis tests demonstrated strong internal reliability.
  • Total and most item scores aligned with Rasch model expectations.
  • Significant differences were found between groups, with the control group scoring higher.

Conclusions:

  • The study provides evidence supporting the validity and internal reliability of the four praxis tests.
  • These findings contribute to the evidence base for the Evaluation in Ayres Sensory Integration® tests.
  • The tests are suitable for use in assessing praxis in children.