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School Achievement Strongly Predicts Midlife IQ. Ruth Spinks, Stephen Arndt, Kristin Capers, Rebecca Yucuis, William McKirgan, Chris Pfalzgraf and Elijah Waterman University of Iowa Carver College of Medicine. By. Mark Bauch. Theory. Elementary achievement is correlated with midlife IQ.

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School achievement strongly predicts midlife iq

School Achievement Strongly Predicts Midlife IQ

Ruth Spinks, Stephen Arndt, Kristin Capers, Rebecca Yucuis, William McKirgan, Chris Pfalzgraf and Elijah Waterman

University of Iowa Carver College of Medicine

By. Mark Bauch


Theory
Theory

  • Elementary achievement is correlated with midlife IQ


Hypothesis
Hypothesis

  • There will be a correlation between early school achievement and midlife IQ scores.


Theoretical construct 1
Theoretical Construct 1

  • Early School Achievement

    -Operational Definition

    -Iowa Test of Basic Skills (ITBS)

    -Grades 3-8 were tested

    -Tests Language and Mathematics


Theoretical construct 2
Theoretical Construct 2

  • Intelligence Testing for Mid Life IQ

    • Operational Definition

      -Wechsler Adult Intelligence Scale, 3rd ed. (WAIS-III, Wechsler, 1997)

      -Measures IQ

      -Individually Administered by a trained research assistant


Design
Design

  • Study and Subjects

    • 219 Participants who were members of the Iowa Adoption Studies

    • Both IQ and school achievement data were available


School achievement strongly predicts midlife iq

Independent Variable

  • School Achievement

    Dependent Variable

  • IQ performance


Results
Results

  • School Achievement scores were highly correlated with WAIS-III FSIQ, sharing 41% of their variance.

  • Verbal IQ shared more variance with school achievement(50%) than performance IQ(14%).


Results cont
Results cont.

  • As expected, higher school achievement scores were associated with more years of education, higher income, and higher occupational status.


More results
More Results

  • When computing partial correlations between school achievement and mid life education. (controlling for Full Scale IQ)

    • School achievement and educational level was reduced by half (r = 0.17, p<0.05, table 3).


Questions
Questions

  • Any Questions Class