Figure 3.

The final mediator model for purposeful stair climbing activity (STAIR) among boys in the Choice, Control, and Change curriculum. T1 represents pretest and T2 represents post-test scores. Bold arrows and numbers represent significant regression coefficients. e1–e7 are error terms. The unit of daily STAIR is flights: a flight of stairs is going up one floor in a building, such as from the first to the second floor. Response options: (a) 1 = will not do it within the next 6 months, 2 = will try within the next 6 months, 3 = plan to do it in a month or so, 4 = currently doing it for past 1–6 months, and 5 = have been doing it for over past 6 months; (b) 1 = strongly disagree, 2 = disagree, 3 = uncertain, 4 = agree, and 5 = strongly agree; and (c) 1 = not sure, 2 = a little sure, 3 = somewhat sure, and 4 = very sure. Scores were coded in a way that higher scores always indicate more desirable for all psychosocial determinants. To enhance clarity of the figure, covariance among T2 variables is not reported. *p < 0.05; **p < 0.01; ***p < 0.001.