“…The second point is that with a total 694 students and records on 4,043 subjects we overcome the use of small student samples (Cortright et al, 2011;Kelly, 2012;2016;O'Sullivan et al, 2015;) which may generate a bias of sample size, conditioning in some cases the generalization of the results. Third, using recorded behavioural data, instead of self-reported data to measure attendance, avoids the discrepancies between self-reported data and actual data in the assessment of absenteeism and performance (Barrett et al, 2007;Kelly, 2012) and the serious threat regarding validity, memory bias and social desirability (Porter, 2011;Standish & Umbach, 2019), although this limitation has been overcome in previous studies using electronic attendance measures (Newman-Ford et al, 2008). Finally, but no less relevant, having recorded data on all students, we collect information on absent students, who otherwise would not participate.…”