Which aspect is not an asset of the Differential Ability Scales-II® (DAS-II®)?

The reason "comparable battery of subtests for all ages" is not considered an asset of the Differential Ability Scales-II® (DAS-II®) relates to the structure of the assessment itself. The DAS-II is designed with specific age ranges in mind, which means that the subtests vary depending on the developmental stage of the child being assessed. Different sets of subtests are tailored to assess the capabilities of children at different ages, allowing for more age-appropriate evaluations.

In contrast, the other aspects mentioned highlight significant strengths of the DAS-II. It has established reliability and validity, meaning that it consistently produces accurate results and measures what it is intended to measure. The existence of diagnostic subtests is also a critical asset, as these help identify specific cognitive strengths and weaknesses in children, facilitating targeted interventions. Additionally, the provision of a special nonverbal composite is particularly beneficial for evaluating children with language deficits, offering a more comprehensive understanding of their cognitive abilities without the confounding factor of language proficiency.