This helpful manual guide professionals through the process of administering, scoring, and interpreting the Communication and Symbolic Behavior Scales Developmental Profile (CSBS DP™), an easy-to-use, norm-referenced screening and evaluation tool that measures the communicative competence of children with a functional communication age of 6 to 24 months and a chronological age of 6 months to 6 years. The manual includes:- Information on how and why CSBS DP™ was developed and refineddetailed, step-by-step instructions on how to administer and score each part of CSBS DP™: the Infant-Toddler Checklist, the Caregiver Questionnaire, and the Behavior Sample. - A chapter on the technical characteristics of CSBS DP™, including standardization, reliability, and validity. - Helpful tips on putting caregivers at ease and encouraging the most communication from very young children. - An extensive companion to the CSBS DP™ tutorial videotapes, including completed Behavior Samples for the six children shown and comments on the sampling and scoring decisions on the forms. - Guidelines, case studies, and sample letters to parents that help professionals interpret and report the results of CSBS DP™. With the clear instructions in this manual—reinforced by practical tips, charts, case studies, and scoring practice—professionals will use CSBS DP™ accurately and confidently with the children and families they serve. Available separately or as part of the CSBS DP™ Complete Kit are the other materials required to conduct a CSBS DP™ assessment. This manual is part of CSBS DP™, 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 young children. CSBS DP is an ideal starting point for IFSP planning and can be used as a guide to indicate areas that need further assessment.