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Evaluating clinical significance through equivalence testing: extending the normative comparisons approach
Robert A Cribbie1, Chantal A Arpin-Cribbie
1Department of Psychology, York University, 4700 Keele Street, Toronto, Ontario M3J 1P3, Canada. cribbie@yorku.ca
Summary
This study refines methods for measuring clinical significance in psychological interventions using equivalence testing. It clarifies hypotheses and incorporates new advances to assess if clients function similarly to controls post-treatment.
Area of Science:
- Psychology
- Clinical Psychology
- Behavioral Interventions
Background:
- Measuring the effectiveness of behavioral interventions is crucial in psychology.
- Various approaches exist for measuring clinical significance, focusing on different outcomes.
- A key question is whether clients achieve functioning levels comparable to normal controls post-intervention.
Purpose of the Study:
- To clarify hypotheses in clinical significance measurement using equivalence testing.
- To extend existing methods by incorporating recent advancements in equivalence testing.
- To propose a revised approach for evaluating clinical significance through equivalence testing.
Main Methods:
- Utilizes tests of equivalence to measure clinical significance.
- Clarifies the nature of hypotheses tested within equivalence testing frameworks.
- Incorporates recent advances in statistical equivalence testing.
Main Results:
- Provides a clearer understanding of hypotheses in equivalence testing for clinical significance.
- Extends the application of equivalence testing with updated statistical methods.
- Presents an empirically demonstrated revised approach for clinical significance evaluation.
Conclusions:
- The revised approach offers a more robust method for assessing clinical significance.
- Equivalence testing, when updated, effectively addresses whether clients reach normative functioning.
- This study contributes to the precise measurement of intervention effectiveness in psychology.
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