“…Self-determination theory (SDT) (Deci & Ryan, 1985;Ryan & Deci, 2000a) states that intrinsic motivation facilitates higher levels of engagement and achievement, whereas extrinsic types of motivation can lead to maladaptive learning behaviours and outcomes. Previous research has empirically supported these claims and found positive reciprocal associations between intrinsic motivation and engagement and achievement (see for example Green et al, 2012;Guay, Ratelle, Liem, & Litalien, 2010;Korpershoek, 2016;Michou,Vansteenkiste, Mouratidis, & Lens, 2014;Taylor et al, 2014;Walker, Greene, & Mansell, 2006). Even though motivation has been found to facilitate achievement and vice versa, most studies only found weak or modest associations between motivation-related constructs on the hand, and behavioural engagement and achievement on the other hand (for reviews, see for example Cerasoli, Nicklin, & Ford, 2014;Richardson, Abraham, & Bond, 2012) instead of the powerful relationships that are often assumed.…”