R Script for manuscript on - Sources of Mathematical Self-Concept and Motivation for Learning: Insights to Inform Design of Educational Interventions in a University

Construct Measure Survey Question(s) Variable Name (component variables are shown in brackets) Self-concept Aggregate measure from Likert responses. Q2 sc_score_ordinal (self_efficacy_understand, self_efficacy_assessment, self_efficacy_career, self_efficacy_good) Mastery experience Combination of Leaving Certificate points and the grade achieved in their most recent mathematics module. Q12 & Q13 Mastery (grade, points) Growth mindset fixed vs growth Q3 Mindset Peer effect Impact of peers: very positively/positively/neutral/ negatively/ very negatively For modelling, the categories very positively and positively were combined and the categories very negatively and negatively were combined. Q7 Peers Lecturer effect Impact of lecturers: very positively/neutral/ negatively/ very negatively For modelling, the categories very positively and positively were combined and the categories very negatively and negatively were combined. Q7 Lecturer Perceived difficulty Perceived difficulty in comparison to other modules: least difficult/similar to other modules/most difficult Treated as a categorical variable for RQ2 with similar to other modules as the reference category. Treated at ordinal for RQ3 with 0 corresponding to the category least difficult, 1 for on par with other modules and 2 for most difficult. Q5 difficulty Mathematics performance Grade achieved in their most recent mathematics module, midpoint of grade band. Q13 grade Enjoyment Enjoyment compared to other modules: most enjoyable/similar to other modules/ least enjoyable/ I didn’t enjoy any module Q4 enjoyment Utility value motivation Categorical variable with 6 categories, treated as binary for the structural equation model (SEM), with “I just want to pass the module” as one category, with all other categories combined into one. Q1 VAM Pre-university mathematics grade Leaving Certificate points, midpoint of grade band. Q12 points