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Table 3 Trait measures: number of items, means, reliabilities, and internal consistency reliability

From: Subjective (dis)utility of effort: mentally and physically demanding tasks

Variable Items Mean SD α
Self-Concept and Self-Estimates of Abilities
 Verbal Self-Concept 6 5.00 .65 .76
 Math Self-Concept 6 5.15 .73 .86
 Spatial Self-Concept 6 4.72 .70 .79
 Self-Estimate of Verbal Abilities 4 71.59 14.03 .79
 Self-Estimate of Math Abilities 5 77.36 13.87 .88
 Self-Estimate of Spatial Abilities 4 68.04 15.85 .84
 Self-Estimate of Perceptual Speed/Psychomotor Abilities 6 69.13 15.11 .87
 Self-Estimate of General Abilities 3 71.10 14.09 .75
 Preference for Numerical Information 11 4.68 .75 .88
Composites
 Verbal/Crystallized 5 0.00 1.00 .83
 Math/Fluid 4 0.00 1.00 .75
Personality and Motivation
 Typical Intellectual Engagement 12 4.17 .76 .85
 Extroversion 10 3.90 .93 .90
 Openness to experience 12 4.08 .68 .72
 Need for Achievement 10 4.68 .63 .84
 Social Closeness 10 4.17 .98 .90
 Conscientiousness 12 4.25 .73 .87
 Self-Discipline 10 3.05 .84 .90
 Boredom Proneness 7 2.87 .66 .65
 Desire to Learn 8 4.61 .67 .83
 Mastery 8 4.21 .47 .83
 Other-Oriented Goals 7 4.16 .76 .79
 Competitiveness 6 3.40 .37 .90
 Worry in Achievement Contexts 10 3.75 .69 .86
 Emotionality in Achievement Contexts 9 3.45 .62 .86
Composites
 Mastery/nAch 5 0.00 1.00 .89
 TIE/Openness, Desire to Learn 3 0.00 1.00 .77
 Extroversion, lack of worry in Achievement context 4 0.00 1.00 .70
 Competitiveness, Other-oriented goals 2 0.00 1.00 .72
Interests
 Realistic 15 51.45 13.46 .89
 Investigative 15 56.21 13.82 .91
 Artistic interests 15 54.36 16.27 .90
 Social 15 61.79 10.43 .82
 Enterprising 15 52.08 12.46 .87
 Conventional 15 47.23 15.11 .92