Hayes in the 1980s (Hayes & Brownstein, 1986;Zettle & Hayes, 1986), is a psychotherapeutic approach based on Relational Frame Theory (RFT). ACT is based on the principle that attempting to remove, replace, or reduce unwanted thoughts and sensations is a root cause of human suffering. Rather than helping individuals to rid themselves of such unwanted internal experiences (e.g., distressing thoughts or the unwanted physical sensations associated with anxiety), ACT uses acceptance and mindfulness processes, and commitment and behavioural strategies to help clients change the relationship that they have with their internal experiences. Mindfulness-acceptance approaches in sport psychology have become more prevalent since Gardner and Moore (2001) discussed their application to performance contexts. In this chapter, the theoretical underpinning of ACT will be discussed in detail, and a review of the relevant sport psychology literature will be provided. The authors will also provide a hypothetical case-study of an athlete presenting with issues related to confidence and decision making. The case-study is used to explain how ACT can typically be applied in a one-to-one setting, using a hypothetical transcript. Typical exercises, activities, and metaphors that might be used during consultancy are also included.
Foundations of ACTAcceptance and Commitment Therapy (ACT) is a 'third-wave' behavioural therapy, based on Relational Frame Theory (RFT: Hayes et al., 2004) and grounded in Functional Contextualism (Hayes et al., 1988). Zettle et al. (2016) provide detail on RFT and Functional Contextualism that goes beyond the scope of this chapter, yet it is important to acknowledge here that ACT has emerged from previous traditions in behavioural psychology.Traditionally, applied sport psychology has drawn mostly from cognitive-behavioural approaches to psychotherapy (Turner et al., 2020). Using psychological 'skills' such as selftalk, imagery, relaxation, and goal-setting, these CBT-based approaches seek to challenge unwanted 'negative' thoughts, emotions, and sensations. Sports performers are taught strategies to help them reduce or eliminate 'faulty' cognitions or undesirable internal experiences in pursuit of an 'ideal' performance state (i.e., no anxiety, high self-confidence, relaxed, and thinking 'positively').ACT, rooted in Functional Contextualism, proposes a different approach in that it is a philosophical approach in which thoughts, feelings, memories, and sensations that we might perceive to be 'negative' are not actually problematic by definition. Instead, it is the way that they function in certain contexts that might be problematic. When an athlete can dispassionately observe a thought as nothing more than a mental event for example (i.e., cognitive defusion), rather than believe the thought within a particular context to be absolute truth (i.e., cognitive fusion), the particular thought is no longer a problem to be eradicated. The thought might still be unpleasant and unwanted, but it does not prevent the athlete...