One embodiment provides a method, including: obtaining a first question on a multiple choice exam comprising a plurality of possible answers; receiving his or her answer selection of one of the plurality of possible answers; identifying an answer time corresponding to the amount of time between presentation of the question and receiving the answer selection; determining if the test taker is guessing the answer to the question, wherein the determining comprises (i) comparing the answer time to a predetermined threshold answer time and (ii) ascertaining that the test taker is guessing when the answer time is outside the threshold answer time; providing to the test taker one or more additional questions, wherein the one or more additional questions are related to the first question; and evaluating the test taker using at least one of: the answer selection and any test taker response to the one or more additional questions.