Edinburgh Napier University

  Self-efficacy and perceived enjoyment have been recognised as important psychological correlates of children’s physical activity (PA). However, research investigating the psychological process underpinning self-efficacy and perceived enjoyment has generated “contradictory” findings – with some regarding self-efficacy as an antecedent of enjoyment while the others arguing for the reverse. To mitigate this confusion, we have embraced the largely overlooked distinction between task- and barrier-efficacy in PA research and have examined the proposal that task-efficacy enhances perceived enjoyment and, subsequently, increases barrier-efficacy and PA. In a sample of 331 eight-to-ten years old schoolchildren (169 boys), task-efficacy manifested an indirect effect on accelerometer-based measures of MVPA and total PA via perceived enjoyment and subsequently barrier-efficacy. Perceived enjoyment served as a mediator of task-efficacy on MVPA but not total PA. Barrier-efficacy appeared to be a consistent mediator underlying schoolchildren’s PA regardless of PA intensity. The findings suggest that (1) the distinction between task- and barrier-efficacy warrants consideration in children’s PA promotion and (2) the psychological drivers of more vigorous types of PA differ compared to lower intensity PA. Future research would do well to explore the key psychological factors underpinning less vigorous types of PA to inform the development of effective PA interventions for those who have difficulties engaging in MVPA.