頭が良いと幸せなのか？→いえ、幸せには関係ありません。

40 40 40 30 30 30 20 20 20 10 10 10 50 75 100 125 150 50 75 100 125 150 50 75 100 125 150 Positive Relations Linear R² = .001 Quadratic R² = .007 Self-Acceptance Linear R² = .004 Quadratic R² = .002 Personal Growth Linear R² = .029 Quadratic R² = .003 40 40 40 30 30 30 20 20 20 10 10 10 50 75 100 125 150 50 75 100 125 150 50 75 100 125 150 Purpose in Life Linear R² = .011 Quadratic R² = .002 Environmental Mastery Linear R² = .001 Quadratic R² = .004 Autonomy Linear R² = .022 Quadratic R² < .001 Figure 1. Locally-Weighted Regression Plots for Psychological Well-Being regressed on Cognitive Ability. Each plot represents the observed relationship for each dimension of psychological well-being in the WLS cohort. A significant U-shaped effect was detected for Positive Relations with Others but not for any of the five remaining well-being dimensions. Moreover, no U-shaped or practically significant nonlinear effects were found for life satisfaction measures in the BCS70, NLSY79, or the NLSY97. Table 3. Summary of Polynomial Regression Results by Outcome Category k Mean n Linear R² Quad. ΔR² Educational & Occupational Educational Attainment 4 7,132 .254 .001 Occupational Attainment 10 5,498 .155 .000 Annual Income (log) 27 4,899 .064 .002 Unemployment 16 6,363 .051 .001 Leadership 13 5,520 .012 .000 Job Satisfaction 16 6,296 .002 .000 Health & Well-Being Depression 9 6,969 .029 .002 Physical Exercise 11 6,299 .015 .000 Self-Reported Health 16 6,328 .011 .001 Body Mass Index 13 6,233 .011 .000 Subjective Well-Being 12 6,465 .006 .002 Sleep Habits 14 6,290 .004 .002 Health Conditions 12 6,068 .004 .000 Social Volunteering 9 6,037 .032 .000 Civic Participation 11 5,793 .022 .000 Social Participation 13 6,283 .013 .001 Marital Status – Divorced 4 5,857 .007 .002 Marital Status – Married 4 7,775 .007 .002 Note. k = number of outcomes tested; All R² estimates are sample weighted.