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The purpose of this study is to provide content validity evidence for the Verbal Behavior Milestones Assessment and Placement Program (VB-MAPP). A national panel of 13 experts provided an evaluation of the domain relevance, age appropriateness, method of measurement appropriateness, and domain representation across the three levels of the Milestones Assessment, Early Echoic Skills Assessment (EESA), and Barriers Assessment. Overall, the content validity evidence for the VB-MAPP Milestones, EESA, and Barriers Assessment was moderate to strong across the evaluated areas although there were areas with limited or conflicting support. The evidence suggests that the scores of the VB-MAPP provide information relevant to the target behaviors of interest but a few domains may not be fully represented by their specific items.

The current article presents the findings from a systematic review of the available reliability and validity evidence supporting the use of criterion-referenced assessments based on the applied behavior analysis framework. We identified 46 studies that reported reliability and/or validity evidence for six assessments, 37 of which presented reliability evidence and 43 presented validity evidence. Additionally, we extracted and summarized information related to participant characteristics (e.g., age, sex, diagnosis), geographic location, and research setting (e.g., residential facility, home). Overall, we found conflicting support for the use of the assessments. When coupled with the reported usage by behavior analysis professionals, our findings suggest a misalignment between the reportedly used assessments and the number of published studies providing validity and/or reliability evidence. We found inconsistent use of measurement-related vocabulary and that many studies could have been strengthened by conducting different statistical analyses. We provide a summary of studies, findings, and offer recommendations for clinical practice and future measurement research.

A 4-month-old boy with past medical history of eczema presented with fever and cough; a chest radiograph showed lung consolidation, and he was initially treated with amoxicillin for presumed community-acquired pneumonia. After several days, his fever persisted. He was also profoundly anemic. Antibiotic coverage was broadened because of the concern for resistant organisms; he began to improve and was discharged from the hospital. However, at 5 months of age, his fever returned, and he continued to demonstrate lung consolidation on chest radiograph. Additionally, he had lost weight and continued to be anemic. Splenic cysts were noted on abdominal ultrasound. He was diagnosed with an unusual etiology for his pneumonia and improved with the appropriate therapy. An underlying immunodeficiency was suspected, but initial testing was nondiagnostic. At 12 months of age, he presented with another infection, and the final diagnosis was made.

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