Percentage of Second Semester Friends Female 8.17% 12.00% 6.36% 7.50% 9.41% 10.63% Nonengineers (0.03) (0.05) (0.04) (0.04) (0.04) (0.04) Table S6 Each Covariate Included in Each Analysis Significance of Category Outcome Covariate A Priori Basis for Inclusion Covariate 1. Engineering GPA Mean GPA earned = 4.43, Controls for the difficulty of the students t(182) Academic Performance in students’ major < .001 enrolled in. p 2. Perceived Importance of Perceived = 10.63, Tests effects on the perceived importance of daily t(182) Negative Events importance of daily < .001 negative events the perceived p relative to positive events. importance of daily positive events (alternative analyses yield similar results, Supplemental Daily Diaries Material). 3. Confidence Handling Daily [None] - - School Stress 4. Day-to-Day Level and Stability [None] - - of Self-Esteem 5. Evaluation of Current Experience Preintervention = 19.53, Tests effects relative to what would be expected on t(218) in Engineering assessment of the < .001 the basis of baseline measurements (similar to p Attitudes Toward outcome change scores). Engineering 6. Perceived Prospects of Future Preintervention = 20.17, Tests effects relative to what would be expected on t(218) (Intervention Session) Success in Engineering assessment of the < .001 the basis of baseline measurements (similar to p outcome change scores). 7. Evaluation of Current Experience Preintervention = 9.15, Tests effects relative to what would be expected on t(144) in Engineering assessment of the < .001 the basis of baseline measurements (similar to p Attitudes Toward outcome change scores). Engineering 8. Perceived Prospects of Preintervention = 10.45, Tests effects relative to what would be expected on t(144) (Second Semester) Succeeding in Engineering assessment of the < .001 the basis of baseline measurements (similar to p outcome change scores). 9. % Male Engineers Preintervention = 5.20, Tests effects relative to what would be expected on t(137) Friendship Groups (2nd assessment of the < .001 the basis of baseline measurements (similar to p Semester) outcome change scores).
Percentage of Friends Female Nonengineers Second Semester 8.17% (0.03) 12.00% (0.05) 6.36% (0.04) 7.50% (0.04) 9.41% (0.04) 10.63% (0.04) Table S6 Each Covariate Included in Each Analysis Category Outcome Covariate Significance of Covariate A Priori Basis for Inclusion Academic Performance 1. Engineering GPA Mean GPA earned in students’ major t(182) = 4.43, p < .001 Controls for the difficulty of the students enrolled in. Daily Diaries 2. Perceived Importance of Negative Events Perceived importance of daily positive events. t(182) = 10.63, p < .001 Tests effects on the perceived importance of daily negative events relative to the perceived importance of daily positive events (alternative analyses yield similar results, Supplemental Material). 3. Confidence Handling Daily School Stress [None] - - 4. Day-to-Day Level and Stability of Self-Esteem [None] - - Attitudes Toward Engineering (Intervention Session) 5. Evaluation of Current Experience in Engineering Preintervention assessment of the outcome t(218) = 19.53, p < .001 Tests effects relative to what would be expected on the basis of baseline measurements (similar to change scores). 6. Perceived Prospects of Future Success in Engineering Preintervention assessment of the outcome t(218) = 20.17, p < .001 Tests effects relative to what would be expected on the basis of baseline measurements (similar to change scores). Attitudes Toward Engineering (Second Semester) 7. Evaluation of Current Experience in Engineering Preintervention assessment of the outcome t(144) = 9.15, p < .001 Tests effects relative to what would be expected on the basis of baseline measurements (similar to change scores). 8. Perceived Prospects of Succeeding in Engineering Preintervention assessment of the outcome t(144) = 10.45, p < .001 Tests effects relative to what would be expected on the basis of baseline measurements (similar to change scores). Friendship Groups (2nd Semester) 9. % Male Engineers Preintervention assessment of the outcome t(137) = 5.20, p < .001 Tests effects relative to what would be expected on the basis of baseline measurements (similar to change scores).