A method and system are provided for monitoring emotional state changes in a subject basedon facial expressions, based on capturing first facial image data of the subjectand second facial image data of the subject at first and second times respectively, andprocessing the first and second facial image data to produce emotional state changedata for the subject for the period of time between the capture of the first facialimage data and the second facial image data. In some embodiments a sequence ofstimuli is applied to the subject and emotional state change data correlated witheach stimulus acquired. The method and system can be used for modelling relationships betweencognitive and emotional responses. Models and subject emotional state changeanalysis can be employed in a variety of contexts such as management decision making,recruitment, evaluation, education and data mining.
