“…The Self-Determination Theory (SDT) is often cited for its use of intrinsic and extrinsic motivation to explain behaviour (Deci & Ryan, 1985), but actually postulates three basic psychological needs that drive behaviour: autonomy (being in control of one's decisions and behaviour), competence (feeling able to attain behavioural outcomes) and relatedness (feeling understood and respected by others) (Ridgway, Hickson, & Lind, 2016). This model has mostly been applied to behavioural change towards healthier behaviours in the health domain (Friederichs, Bolman, Oenema, Verboon, & Lechner, 2016;Lekes, Houlfort, Milyavskaya, Hope, & Koestner, 2016;Niven & Markland, 2015;Sebire et al, 2016;Staunton, Gellert, Knittle, & Sniehotta, 2015), to medical training (Hoffman, 2014), and to volunteering behaviours (Wu, Li, & Khoo, 2015). The SDT describes behavioural motivation at the macro level (Niven & Markland, 2015).…”