Qualitative data is evidence that participants were not protected from harm. Participants could be seen trembling, sweating, stuttering and laughing nervously. 3 had full-blown uncontrollable seizures. On completion of the test, many obedient participants heaved sighs of relief, mopped their brows or nervously fumbled cigarettes.
However, Milgram did conduct a full debrief and in post experimental interviews with an independent psychiatrist participants expressed that they were glad to take part and had learnt something valuable about themselves.