Help-seeking in Interactive Learning Environments: Effectiveness of Help and Learner-related Factors in a Dyadic Setting. - Tobias Bartholomé; Elmar Stahl; Rainer Bromme (ICLS, 2004)

What matters in help-seeking? A study of help effectiveness and learner-related factors. - Tobias Bartholomé; Elmar Stahl; Stephanie Pieschl; Rainer Bromme (Comput. Hum. Behav., 2006)