3Expert decision-making can be directly assessed, if sport action is understood as 4 an expression of embedded and embodied cognition. Here, we discuss evidence for this 5 claim, starting with a critical review of research literature on the perceptual-cognitive 6 basis for expertise. In reviewing how performance and underlying processes are 7 conceived and captured in extant sport psychology, we evaluate arguments in favour of 8 a key role for actions in decision-making, situated in a performance environment. Key 9 assumptions of an ecological dynamics perspective are also presented, highlighting how 10 behaviours emerge from the continuous interactions in the performer-environment 11 system. Perception is of affordances; and action, as an expression of cognition, is the 12 realization of an affordance and emerges under constraints. We also discuss the role of 13 knowledge and consciousness in decision-making behaviour. Finally, we elaborate on 14 the specificities of investigating and understanding decision-making in sport from this 15 perspective. Specifically, decision-making concerns the choice of action modes when 16 perceiving an affordance during a course of action, as well as the selection of a 17 particular affordance, amongst many that exist in a landscape in a sport performance 18 environment. We conclude by pointing to some applications for the practice of sport 19 psychology and coaching and identifying avenues for future research. How expert athletes decide to do what they do is a topic that has interested 27 scientists for several decades (e.g., Beise & Peasley, 1937), and particularly sport 28 psychologists(e.g., Straub & Williams, 1984). It has been argued that sport is a most 29 appropriate context for studying expert decision-making (Gilovitch, 1984, Gilovitch et al, 30 1985. According to Gobet (2016), sport is a domain of expertise, where expertise relies 31 on perception: "experts literally 'see' things differently compared to novices" and "these 32 differences in perception and knowledge affect problem solving and decision making" 33 (Gobet, 2016, p.7). 34 Predicated on these ideas, studies of decision-making in sport have intensively 35 tested athletes'perception and anticipation, attention, memory, and decision-making. 36An important gap emerges immediately: decision-making in sport, by following trends 37 in cognitive psychology, has neglected the important role of action and its constitutive 38 role in cognition (Araújo, Ripoll & Raab, 2009;Prinz, Beisert & Herwig, 2013; Wolpert & 39 Landy, 2012). In this article, we critically overview research on the perceptual-cognitive 40 basis of decision-making, before we present an action-based alternative, from the 41 ecological dynamics framework, clarifying repercussions for theory and research in 42 sport psychology. 43
44The perceptual-cognitive framework for the study of decision-making in sport 45Currently, the perceptual-cognitive view of decision-making tends to focus on 46 use of perception, memory and decision-making tas...