The purpose of this study was to develop an assessment instrument that would allow clinicians to (1) evaluate behaviors of infants and toddlers during therapeutic intervention based on their own observations; (2) be applicable in a home-based or an outpatient therapeutic setting; and (3) be appropriate for use with infants and toddlers from birth to three years of age regardless of their developmental level or level of disability. Six pediatric therapists participated in the development and content evaluation of the instrument, Therapy Behavior Scale (TBS) with its subsequent revision into the TBS Version 1.0. Three raters pilot tested the scale with seven infants and toddlers. The results supported the content validity of the TBS Version 1.0 and led to the development of the TBS Version 1.1. Further research is needed to validate the newest version of the scale and to establish its intra-rater and interrater reliability.
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