“…It is further expected that changes in students’ mastery goal orientation would be associated with changes in their academic effort and intrinsic motivation (Hypothesis 2). Additionally, we assume that student-perceived support of competence, autonomy, and relatedness in class in grade 8 would positively predict the level (grade 8) and change (Δ grade 9–grade 8) in students’ mastery goal orientation ( Patrick et al, 2007 ; Ciani et al, 2010 ), academic effort ( Trautwein et al, 2009 ), and intrinsic motivation ( Lazarides et al, 2015 ) (Hypothesis 3). However, because studies have demonstrated that student-perceived autonomy support in class was not significantly associated with their effort ( Liukkonen et al, 2010 ), we expect student-perceived autonomy support in class to have weak effects on students’ academic effort.…”