Abstract: An evaluation system for detecting an anomalous response to a particular question from a plurality of questions is described. For each of the plurality of questions, data relating to a score, a trainee's confidence level in his response, and the elapsed time are stored. An anomaly processor processes the score, confidence level and elapsed time data for a set of questions taken from the plurality of questions. An output is produced indicating whether or not an anomalous response to a particular question is detected, which can be used by a computerised training system to determine whether or not the trainee passes the assessment. Where the candidate has passed the test, the processor determines an interval over which the candidate is deemed to retain a competent level of understanding of the topic. A timing unit may be provided for outputting a trigger signal when the interval has elapsed.