 
Differential Ability Scales
(DAS)
Stepbystep
Analysis
Ipsative analysis of Kate's subtests provides further help in understanding
Kate's performance on the DAS. Identifying each subtest as being either
statistically higher or lower than the mean of the test allows the interpreter
to develop hypotheses regarding shared abilities. Each of her subtest scores was
compared to the mean of her core subtests. Three of her core subtests differed
significantly from the mean (SQR, RDes, and PCon) with SQR being lower while
RDes and PCon were both significantly above the mean. Additionally, two of her
diagnostic subtests (RDig and SIP) were found to be significantly depressed when
compared to her overall mean.
Figure8 SUBTEST ANALYSIS
MEAN CORE T SCORE: 
50 

Critical 

Difference from 





T Score 

Value 

Mean Core T 

High/ Low (H / L) 


Word Definitions (WDef) : 
49 

10 

1 

 


Similarities (Sim) : 
56 

11 

6 

+ 


Matrices (Mat) : 
43 

11 

7 

 


Seq. & Quant. Reasoning (SQR) : 
32 

10 

18 

L 


Recall of Designs (RDes) : 
60 

10 

10 

H 


Pattern Construction (PCon) : 
60 

8 

10 

H 












Recall of Digits (RDig) : 
30 

11 

20 

L 


Recall of Objects  Immed. (RObjI) : 
55 

14 

5 

+ 


Speed of Infor. Process. (SIP) : 
35 

9 

15 

L 


Recall of Objects  Delay (RObjD) : 
61 

14 

11 

+ 


(RObjI) vs (RObjD) : 


14 

6 

No Significant
difference 
Recall of Digits vs. Objects: 


12 

25 

Digits / Objects Higher 
The comparisons between the Immediate and the Delayed trials of the Recall of
Objects subtest showed no significant difference [Examiners should not interpret
these two measures separately unless the difference between them is at least 14
points.], so the interpretation focuses on the Immediate trial only. There was a
difference noted between the Recall of Digits and the Recall of Objects subtest,
with the score on the Objects being 25 points higher than the score on the
Digits.
