PubMed · 1968 · 16 citations · 0 references
Social SciencesBehavioral SciencesPsychologyCognitive PsychologyDevelopmental PsychologyIndividual DifferencesCognitive AbilitiesIntelligence AssessmentTwin StudiesCognitive Ability HeritabilityGeneral Cognitive Ability GeneticsGeneral Mental AbilityHeritability Of IntelligenceTwin Studies Of IntelligenceTwin Studies Of Personality