Behavioral influence on network choice for Jefferson and Sunshine High, parameters and (95% confidence intervals).

Network change parameters are adjusted for structural (Table 3) and behavior change parameters (Table 5).1Positive values for attractiveness indicate that egos generally prefer to become or maintain friendships with alters who have high levels of the BMI or behavior; negative values indicate a disinclination to keep or maintain friendships with individuals with high levels of the BMI or behavior.2Sociability indicates that egos with high levels of BMI or the behavior prefer to have more friends.3Similarity is the measure of homophily on BMI or the behavior. Positive values indicate a preference for alters whose values are similar to the ego’s.