Handbook of Organization Measurement
General Mental Ability (GMA)
construct.general_mental_ability_gma
§3The math on what we know
Synthesized priors from the live registry: pooled r, studies (k), total N, top study grade, and heterogeneity. Rows flagged for heterogeneity or single-study evidence are directional, not settled — read them as a central tendency.
What general mental ability (gma) predicts
| Outcome | r | k | N | Grade | Confidence |
|---|---|---|---|---|---|
| Training Performance | +0.54 | 3 | 15,355 | A | I²≈0.96 |
| Overall Job Performance | +0.43 | 5 | 59,563 | A | I²≈1.00 |
| Task Performance | +0.33 | 4 | 75,953 | A | I²≈1.00 |
| Quality Of Hire | +0.31 | 1 | 50 | A | single study |
| Sales Performance | +0.27 | 1 | 50 | A | single study |
| Organizational Citizenship Behavior OCB | +0.23 | 1 | 50 | A | single study |
| Counterproductive Work Behaviours | −0.02 | 1 | 50 | A | single study |