In this case it’s important to emphasize that difference, because a commonly raised hypothesis is that while we can see clear training effects on IQ, none of these effects are on the underlying g-factor, i.e. the gains do not generalize to new tasks. For naive interventions, this has been pretty clearly demonstrated:
IQ scores provide the best general predictor of success in education, job training, and work. However, there are many ways in which IQ scores can be increased, for instance by means of retesting or participation in learning potential training programs. What is the nature of these score gains?
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The meta-analysis of 64 test– retest studies using IQ batteries (total N= 26,990) yielded a correlation between g loadings and score gains of −1.00, meaning there is no g saturation in score gains.
In this case it’s important to emphasize that difference, because a commonly raised hypothesis is that while we can see clear training effects on IQ, none of these effects are on the underlying g-factor, i.e. the gains do not generalize to new tasks. For naive interventions, this has been pretty clearly demonstrated: