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Content Validity Evidence for the Verbal Behavior Milestones Assessment and Placement Program.
Kristen L Padilla1, Jessica S Akers2
1Department of Educational Psychology, Baylor University, One Bear Place #97301, Waco, TX, 76798-7301, USA. Kristen_Padilla-Mainor@baylor.edu.
Journal of Autism and Developmental Disorders
|January 15, 2021
Summary
This study assessed the content validity of the Verbal Behavior Milestones Assessment and Placement Program (VB-MAPP). Expert review indicated moderate to strong evidence for VB-MAPP, supporting its relevance for target behaviors.
Area of Science:
- Applied Behavior Analysis (ABA)
- Developmental Psychology
- Educational Assessment
Background:
- The Verbal Behavior Milestones Assessment and Placement Program (VB-MAPP) is a widely used assessment tool in Applied Behavior Analysis.
- Establishing strong psychometric properties, including content validity, is crucial for the accurate application and interpretation of assessment results.
- Previous research has not comprehensively evaluated the content validity of the VB-MAPP across its core components.
Purpose of the Study:
- To provide content validity evidence for the Verbal Behavior Milestones Assessment and Placement Program (VB-MAPP).
- To evaluate the domain relevance, age appropriateness, method of measurement appropriateness, and domain representation of the VB-MAPP.
- To assess the three core components: Milestones Assessment, Early Echoic Skills Assessment (EESA), and Barriers Assessment.
Main Methods:
- A national panel of 13 experts in the field was convened.
- Experts evaluated the VB-MAPP components based on predefined criteria: domain relevance, age appropriateness, method of measurement appropriateness, and domain representation.
- Data were collected and analyzed to determine the overall content validity evidence.
Main Results:
- Overall content validity evidence for the VB-MAPP Milestones, EESA, and Barriers Assessment was found to be moderate to strong across evaluated areas.
- Specific domains within the VB-MAPP showed limited or conflicting expert support.
- Evidence suggests VB-MAPP scores are relevant to target behaviors, though some domains may lack full item representation.
Conclusions:
- The study provides significant content validity evidence supporting the use of the VB-MAPP.
- While generally strong, areas for potential refinement in item representation within certain domains were identified.
- The findings support the VB-MAPP's utility in assessing and guiding interventions for verbal behavior development.
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