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A dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of requirements for the degree of Master of Science. October 2014. / Despite the fact that there has been quite a lot of research done in the eld of facial expression recognition, not much development has occurred in detecting the intensity of facial actions. In facial expression recognition, the intensity of facial actions is an important and crucial aspect, since it would provide more information about the facial expression of an individual, such as the level of emotion in a face. Furthermore, having an automated system that can detect the intensity of facial actions in an individual's face can lead up to a lot of potential applications from lie detection to smart classrooms. The provided approach includes robust methods for face and facial feature extraction, and multiple machine learning methods for facial action intensity detection.

Thesis (M. Phil.)--University of Hong Kong, 2001. / Includes bibliographical references (leaves 57-61).

Thesis (M.A.)--Humboldt State University, 2009. / Includes bibliographical references (leaves 54-66). Also available via Humboldt Digital Scholar.

Thesis (M.A.)--York University, 2001. Graduate Programme in Psychology. / Typescript. Includes bibliographical references (leaves 69-76). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://wwwlib.umi.com/cr/yorku/fullcit?pMQ67732.

Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 81-88). Available also in a digital version from Dissertation Abstracts.

This thesis investigates our sensitivity to social signals from the face, both in health and disease, and explores some of the methodologies employed to measure them. The first set of experiments used forced choice and free naIll1ng paradigms to investigate the interpretation of a set of facial expressions by Western and Japanese participants. Performance in the forced choice task exceeded that measured in the free naming task for both cultures, but the Japanese participants were found to be particularly poor at labelling expressions of fear and disgust. The difficulties experienced with translation and interpretation in these tasks led to the development of a psychophysical paradigm which was used to measure the signalling strength of facial expressions without the need for participants to interpret what they saw. Psychophysical tasks were also used to measure sensitivity to eye gaze direction. A 'live' and screen-based task produced comparable thresholds and revealed that our sensitivity to these ocular signals was at least as good as Snellen acuity. Manipulations of the facial surround in the screen-based task revealed that the detection of gaze direction was facilitated by the presence of the facial surround and as such it can be assumed that gaze discriminations are likely to be made in conjunction with other face processing analyses. The tasks developed in these chapters were used to test two patients with bilateral amygdala damage. Patients with this brain injury have been reported to experience difficulties in the interpretation of facial and auditory signals of fear. In this thesis, their performance was found to depend on the task used to measure it. However, neither patient was found to be impaired in their ability to label fearful expressions compared to control participants. Instead, patient SE demonstrated a consistently poor performance in his ability to interpret expressions of disgust. Vll Experiments 2, 3, 4 and 5 of Chapter 3, have also been reported in Perception, 1995, Vol. 24, Supplement, pp. 14. The Face as a long distance transmitter. Jenkins, J., Craven, B. & Bruce, V. Experiments 1,2,3 and 4 of Chapter 3 were also reported in the Technical Report of the Institute of Electronics Information and Communication Engineers. HIP 96-39 (1997-03). Methods for detecting social signals from the face. Jenkins, J., Craven, B., Bruce, V., & Akamatsu, S. Experiments 2 and 5 of Chapter 3, and a selection of the patient studies from Chapter 6 were reported at the Experimental Psychology Society, Bristol meeting, 1996, and at the Applied Vision Association, Annual Meeting, April, 1996. Sensitivity to Expressive Signals from the Human Face: Psychophysical and Neuropsychological Investigations. Jenkins, J., Bruce, V., Calder, A., & Craven, B.

Previous studies show that recovering alcoholics exhibit deficits in perceiving facial affect. The present study investigates whether these deficits are present prior to the onset of alcoholism. Participants with a family history of alcoholism (FHP) and participants without such a family history (FHN) selected the emotion label they felt most closely corresponded with stimuli viewed on a computer screen. Zuckerman's Sensation Seeking Survey was also completed. The data revealed a relationship between family history of alcoholism and the perception of facial expressions. Additionally, FHP participants were higher in sensation seeking compared to FHN participants and high sensation seekers were less accurate in categorizing fearful expressions. Disinhibition and boredom susceptibility were identified as the traits driving the effect between sensation seeking and fear categorization accuracy. An account of how these traits may be associated with both decreased fear perception and a greater risk for alcoholism is discussed, and future research directions suggested.

Thesis (M.A.)--University of Nevada, Reno, 2007. / "December 2007." Includes bibliographical references (leaves 15-16). Online version available on the World Wide Web.

Thesis (M.A.)--University of Detroit, 1957. / "June 1957." Includes bibliographical references (p. 38-40).