Factors disrupting the effectiveness of facial expression analysis in automated emotion detection

Recognition of facial expressions and identification of emotions is possible in at least several ways. The research methods and techniques are improving, but they do not always bring the expected results. This may be due to external factors that interfere with the expression of emotions evoked in a person tested. One of such factors is the use of extra sensors while measuring. Article presents the findings of a study where various combinations of measurement techniques were employed.