5.1 What methodology?5.2 Ethics approval5.3 Experiment design5.4 Independent variables5.5 Dependent variables5.6 Other variables5.7 Task and procedure5.8 Participants5.9 Questionnaire design5.10 Within-subjects and between-subjects5.11 Order effects, counterbalancing, and latin squares5.12 Group effects and asymmetric skill transfer5.13 Longitudinal studies5.14 Running the experiment