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General Ability Measure for Adults (GAMA) - Frequently Asked Questions

Frequently Asked Questions for GAMA


Test Content

How reliable and valid is the GAMA test?

The GAMA IQ score reliability ranges from 0.79 to 0.94 across normative age groups, with an average of 0.90 (reliability based on a linear composite). The test-retest reliability for the GAMA IQ score is 0.67 over a 2- to 6-week interval for a sample of 86 people. The validity coefficients between the GAMA IQ score and other intelligence tests range from .70 with the K-BIT to .75 with the WAIS-R® FSIQ. Additional reliability and validity statistics can be found in Chapter 5 of the GAMA manual.



Can I use the GAMA test with a client who speaks English as a second language?

If the individual can read and understand English at least at a third-grade level, the GAMA test is appropriate to use.


Can I use the GAMA test for group administration?

Yes, there are group administration instructions in the manual. 


Key Information


A self-administered, timed test that uses abstract designs, shapes and colours to help measure general ability.


Achilles N Bardos, PhD

Jack A Naglieri

Publication Year


Age Range

18 years and older


25 minutes (timed: 66 items; 6 response options)

Qualification Code


£119.00 (Complete kit price from)
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