Figure 2.

This decision tree translated into words indicates that truth tellers are those subjects who have an average RT to complex NO responses below 2,035 ms and make no errors. If the RT is below 2,035 ms and the subject makes errors in responding to simple sentences but the average total number of errors is still below 0.01, then he or she is a truth teller. By contrast, if the average total number of errors is above 0.02 or the RT in the complex NO sentences is above 2,035 ms, the responder is a liar.