In addition, Internalizing, Externalizing, and Total Problems scales are scored from both forms.
Module systematically compares up to eight preschool forms.
Scales are based on ratings of 1,728 children and are normed on a new national sample of 700 children. The LDS obtains parents reports of children s expressive vocabularies and word combinations, plus risk factors for language delays. For ages 18-35 months, the LDS is scored to indicate whether vocabulary and word combinations are delayed. For language-delayed older children, the LDS provides comparisons with norms up to 35 months.