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Correlations between Average Mental Sigma Scores
California FirstYear Mental Scale
Hi Factors Influencing the Growth of Intelligence
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21 months ability Alpha-tested anthropometric Army Alpha average IQ Binet boys California Preschool changes in IQ chil Child Development Child Welfare chronological age coefficients compared comparison Control Group critical ratio curves differences dren effect entrance environment environmental influences examination factors fathers formboard foster homes Genet girls given grade homogamy hypothesis increase indicate individual inheritance of intelligence intelligence quotients intervals Iowa IQ points IQ's Jour Kuhlmann-Binet length of attendance mean IQ measures median mental development mental growth mental scores Merrill-Palmer mid-parent education Minnesota Mooseheart mothers Non-Nursery nursery-school attendance nursery-school experience nursery-school group nursery-school training occupational offspring pairs parental correlation percent period present study Progress Administration Psychol range ratings relation Research retest sample Scale selected sibling correlation sigma scores significant Skeels socio-economic Speyer standard deviations Stanford Stanford-Binet tests Stanford-tested status superior Table tabulation theory traits trend twins University of Iowa vocabulary Wellman Winnetka