An important new feature of the CBCL/1˝-5 is the LDS, which uses parents' reports to assess children's expressive vocabularies & word combinations, as well as risk factors for language delays. Developed by Dr. Leslie Rescorla (J. Speech & Hearing Disorders, 1989, 54, 587-599), the LDS has been used in numerous studies of language problems (for additional references, see Bérubé & Achenbach, Bibliography of Published Studies Using ASEBA instruments: 2001 Edition). Based on our new national normative sample, the LDS indicates whether a child's vocabulary & word combinations are delayed relative to norms for ages 18-35 months. The LDS can also be completed for language-delayed older children for comparison with norms up to 35 months. 50 paper forms per package.