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Differential Ability Scales (DAS)


Step-by-step Analysis

Step Eight: Evaluate Qualitative Responses

One final step in DAS interpretation is the qualitative evaluation of both the responses given and the task requirements of the subtests.

Table - 25 shows input/output requirements for each of the DAS subtests. Examiners may wish to examine the demands of a subtest with which a child has had particular problems and contrast that with the child's performance on another subtest having different demands. For example, a child may have done well on the Verbal Comprehension subtest and poorly on the Naming Vocabulary subtest. Contrasting the input/output demands of the subtests, input for Verbal Comprehension involved both auditory and visual meaningful stimuli while Naming Vocabulary included primarily visual input. Additionally, the mode of output for Verbal Comprehension is motoric while the mode for Naming Vocabulary is verbal. Examiners using this comparative approach could investigate further the hypotheses generated by qualitative analysis. To really understand the demands of each subtest, have someone administer the subtest to you. Even with preschool tests, there is no substitute for this experience in helping you understand all the demands of a subtest.

Table - 25   Method of Input and Output for DAS Subtests

Input

Output

Auditory

Visual

Verbal

Motor

Meaningful

Symbolic

Verbal Subtests

Verbal Comprehension

v

v

v

Naming Vocabulary

v

v

Word Definitions

v

 

 

v

 

Similarities

v

 

 

v

 

Nonverbal/Spatial Subtests

Block Building

v

v

Picture Similarities

v

v

v

Copying

v

v

v

Recall of Designs

 

v

v

 

v

Pattern Construction

 

 

v

 

v

Nonverbal (Fluid Reasoning) Subtests

Matrices

 

 

v

v

v

Sequential and Quantitative Reasoning

 

v

 

v

v

Early Number Concepts

Early Number Concepts

v

v

v

v

Achievement Subtests

Basic Number Skills

v

v

 

v

v

Spelling

v

 

 

 

v

Word Reading

 

v

 

v

 

Diagnostic Subtests

Matching Letter-Like Forms

v

v

Recall of Digits

v

 

v

v

 

Recognition of Pictures

v

v

Recall of Objects-Immediate

 

v

 

v

 

Recall of Objects-Delayed

 

v

 

v

 

Speed of Information Processing

 

v

 

 

v

Shaded subtests are those typically administered in the School-Age Battery

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Case Study 1