The purpose of this investigation was to determine if education about the psychometric properties of assessment tools influences the selection of language assessment tools used in the evaluation of child language skills by speech-language pathologists (SLPs). This investigation also tracked SLP’s perception of their own knowledge and confidence in the diagnostic decision making process. This investigation used a single-subject case design with changing criterion to determine if SLPs would increase their tool selection and expand their variety of assessments as a result of the education on psychometric properties. It was hypothesized that increased knowledge and awareness of the psychometric properties of standardized language tools would affect the type and number of assessment tools used in child language assessments; however, results indicated that tool selection did not vary greatly but that positive changes were initiated by the participants with an accelerating slope of tool variation as the intervention progressed. Results also indicated that the participants improved their knowledge about psychometric properties, gained confidence with the measurements, and the participants started utilizing tools that they previously did not use to evaluate a child’s language skills.
