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RESEARCH RESULTS
Cognitive Assessment
The Gibson cognitive assessments demonstrated strong reliability and validity evidence.
KEY RESULTS
Gibson Test reliability: 0.69–0.91; validity: 0.53–0.93.
Sample Size
2,737 people for Gibson Test study
5–85
Age Range
Training Hours
Not applicable
ABOUT THE RESEARCH
The revised Gibson Test of Cognitive Skills was studied in a nationwide sample of 2,737 people ages 5–85. Reliability evidence included test-retest coefficients from 0.69 to 0.91 and split-half coefficients from 0.87 to 0.91, with concurrent validity coefficients against the Woodcock-Johnson III ranging from 0.53 to 0.93. The GACS also showed strong reliability across administrations.
SOURCE
LearningRx Research Results & Client Outcomes Report, 5th Edition
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