A research has been performed which makes it possible for the authors to determine factors responsible for accurate identification of emotions in photographic faces (1), to classify emotions from the viewpoint of the identification difficulty (2), to specify areas where facial expressions are the most difficult to accurately assess (3). Corresponding data are presented. Results of the study can be of use in a variety of practical tasks requiring visual assessment of mans' emotions (particularly when they are simulated, suppressed, or masked).