Usability of a software program can be tested by generating a first electronic record of input events that a user executes with at least one input device during a test session. The operations comprise applying the generated first electronic record to a predictive model to generate a prediction for performing the predefined task. Usability of a software program can be tested by registering input events that a user executes with at least one input device during a test session in which the user performs a predefined task of a software program. The operations comprise generating a first electronic record associated with the test session. The first electronic record includes at least one characteristic of the registered input events and a prediction for performing the predefined task. The prediction is generated by applying the registered input events to a predictive model.