Extremes of Intelligence

              Distribution of IQ Scores

                 Features of Mental Retardation

                 Terman Study of Gifted

             Misuse of Intellegence Tests

                      Environmental Determinants of Intellegence
                                 Shared Family Environment
                                 Environmental Enrichment & Deprivation
                                  Educational Experiences

                            Heredity x Environment Interaction  (Reaction Range)   

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