This thesis examines factors that influence the propensity to, and the utility of, conscious processing during a complex motor skill. Prevalent theories of skill acquisition and automaticity view expert performance as best executed in the absence of conscious control of the movement. There is substantial evidence to support this claim for simple tasks but a lack of research for complex skills is apparent. In this thesis the role of conscious processing (reinvestment) is examined in relation to the full golf swing in baseline and anxiety conditions. The early experiments in the thesis examined the effects of limiting conscious processing through a temporal restriction. This paved the way for the later experiments that looked deeper into individualistic elements of personality and cognitive 'make up,' that may affect the control structures of the golf swing. The results indicate that conscious processing during task performance affects individuals differently. A high 'verbaliser' group deteriorated while 'visualisers' showed improvement during restricted conscious input trials. Furthermore, both short­-term memory and working memory showed positive correlations with task performance. Overall, this study implies a positive role for conscious control in the golf swing and questions the efficacy of reinvestment theory in relation to complex skills.