Appendix 2a.

Rotated factor loadings of friendship quality items.

Item	Factor 1 Loadings	Factor 2 Loadings
How well do you get along with this friend?	0.64307	−0.28838
How close are you to this friend?	0.70037	0.02148
How much do you enjoy spending time alone with this friend?	0.72927	−0.17501
How much do you enjoy spending time alone with this friend?	0.6676	−0.08743
How much do you enjoy spending time alone with this friend?	0.69108	−0.20319
How much do you care about what this friend thinks of you?	0.47498	−0.00308
How much would you want to be like this friend?	0.40534	0.08599
How similar to this friend do you think you are?	0.45797	0.1272
How much does this friend yell at you when he/she has had a bad day?	0.07104	0.67937
How much does this friend nag at you about what you do wrong?	−0.03013	0.82557
How much does this friend criticize you?	−0.11333	0.77629
How much does this friend get into disagreements or fights with you?	−0.07766	0.6747

Note: Factor loadings are derived from the orthogonal rotation.