IQ gains, WISC subtests and fluid g: g theory and the relevance of Spearman's hypothesis to race.

@article{Flynn2000IQGW,
  title={IQ gains, WISC subtests and fluid g: g theory and the relevance of Spearman's hypothesis to race.},
  author={James R. Flynn},
  journal={Novartis Foundation symposium},
  year={2000},
  volume={233},
  pages={202-16; discussion 216-27}
}
IQ gains over time were calculated for each WISC (Wechsler Intelligence Scale for Children) subtest and the subtests ranked by size of gain. Verbal similarities led at 20 points per generation--larger than gains on Raven's Progressive Matrices. Similarities measures on-the-spot problem-solving (something akin to fluid g); verbal subtests that do not measure this show low rates of gain. WISC subtests were also ranked by their correlations with Raven's, the latter being used as a marker for fluid… CONTINUE READING