The Communication and Symbolic Behavior Scales Developmental Profile? (CSBS DP?) is an easy-to-use, norm-referenced screening and evaluation tool that helps determine the communicative competence (use of eye gaze, gestures, sounds, words, understanding, and play) of children with a functional communication age between 6 months and 24 months (chronological age from about 6 months to 6 years). The CSBS DP? Complete Kit, First Normed Edition (Test Kit + Toy Kit) comprises: CSBS DP? Manual, First Normed Edition (with norming tables); 25 1-page CSBS DP? Infant-Toddler Checklists; 25 4-page CSBS DP? Caregiver Questionnaires; 25 Caregiver Rating Perception forms; the CSBS DP? Behavior Sample (including 25 1-page double-sided copies of the CSBS DP? Worksheet for Rating Behaviors, and the Sampling and Scoring Videos; and the CSBS? Toy Kit and materials for test administration.