Of the TA behaviors described in Sect. II and monitored
in our study, only the number of interactions per minute
has a significant correlation with student engagement.
Interestingly, the correlation between interactions and
engagement is explained solely by TA-initiated interactions.
The rate of student-initiated interactions had no
relationship with engagement, while a high rate of TAinitiated
interactions is strongly associated with increased
engagement. Finally, we found a significant correlation
between engagement and learning in this inquiry-based lab.
Our results are summarized in Fig. 3.