His study's design imitated Milgram's, even using the same scripts for the experimenter and suffering learner, but the key difference was that this experiment stopped at 150 volts -- when the learner starts asking to leave.
The new results correlate well with Milgram's: 70 percent of the 40 participants were willing to continue after 150 volts, compared with 82.5 percent in Milgram's study -- a difference that is not statistically significant, Burger said.