Abstract5.1. 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, between-subjects5.11. Order effects, counterbalancing, and Latin squares5.12. Group effects and asymmetric skill transfer5.13. Longitudinal studies5.14. Running the experimentStudent exercisesBibliography