Validity of the cognitive skills index on the Test of Cognitive Skills - Second Edition as a measure of Intelligence with special education children
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Date
2003
Department
Psychology
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Abstract
For many elementary and secondary school students, a standardized group ability
test score may be found in their cumulative record. such results are often used for
placement in instructional programs. However, with relatively little research and
conflicting results, it remains unclean if group ability test scores are appropriate to be used
for any purpose. This study investigated the validity of using the Test of Cognitive Skills -
Second Edition (TCS/2) as a measure of intelligence with special education students, as
compared to the Wechsler Intelligence Scale for Children - Third Edition (WISC-Ill). To
investigate the relationship between the group-administered TCS/2 and the individually
administered WISC-Ill, scores of 66 students (grades 6 through 11) were compared.
Pearson product-moment correlations revealed significant, positive relationships between
the CSI and most scores of the WISC-Ill. However, despite significant relationships, the
correlations are modest at best. T-tests revealed significant differences between the CSI
and all WISC-Ill score means. CSI scores were significantly lower than WISC-Ill scores.
Therefore, the CSI is not recommended as a valid source of information to be used in
decision making regarding special education students. Further research is needed to
determine the validity of the CSI with other student populations.