Participants were also compared with regard to the SSE-related psychological variables: self-efficacy, attitude, and knowledge. All 3 variables demonstrated a significant time effect: SSE self-efficacy (F2,72 = 62.03, P < .001, η2 = 0.63), SSE attitude (F2,72 = 26.98, P < .001, η2 = 0.43), and SSE knowledge (F2,72 = 283.55, P < .001, η2 = 0.89). The intervention (workbook vs in-person training) showed no significant difference in the 3 variables over the 3 times: SSE efficacy (F2,72 = 1.33, P > .05, η2 = 0.04), SSE attitude (F2,72 = 1.22, P > .05, η2 = 0.03), and SSE knowledge (F2,72 = 1.50, P > .05, η2 = 0.04). The means for these 3 variables were lowest at preintervention and increased at both the short-term and long-term follow-ups. The nonsignificant intervention × time interaction suggests these postintervention increases were similar in each intervention.