Mean head and shoulder heights when seated: subconscious postural cycles during discrete, computerised stimuli

Witchel, Harry J, Westling, Carina, Needham, Rob, Healy, Aoife and Chockalingam, Nachiappan (2013) Mean head and shoulder heights when seated: subconscious postural cycles during discrete, computerised stimuli. In: Barcellini, Flore and Murray, Dianne (eds.) ECCE 2013 : proceedings of the 31st European Conference on Cognitive Ergonomics. Association for Computing Machinery, New York. ISBN 9781450322515

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Discrete, three-minute, computer-presented stimuli (designed to range from engaging to incredibly boring) were used to elicit changes in cognitive/emotional states in seated, healthy volunteers. These stimuli did not require the use of a mouse, so movements were assumed to be noninstrumental. Stimuli included films, games, quizzes and music. Motion capture and video analysis were used to detect changes in head and shoulder position in response to the stimuli. Results include changes occurring between the first half and the second half of each of the main stimuli (i.e. arising in less than one minute as the volunteer “settles in”); in the second half of each stimulus, there were decreases in head height and shoulder height (i.e. position rather than movement). In conclusion, we speculate that non-instrumental changes in head height and shoulder height may suggest loss of vigilance or diminishing arousal in seated computer-users. Our unique contributions are: 1) discrete stimuli, were used on seated volunteers 2) without a mouse, to show that 3) modest (mm) head and shoulder movements in the vertical axis correlated with 4) subtle cyclical changes in boredom, not overall changes in fatigue. Future psychological validation of tutoring systems with discrete stimuli can use these postural parameters as part of a multimodal analysis of engagement.

Item Type: Book Section
Schools and Departments: Brighton and Sussex Medical School > Brighton and Sussex Medical School
School of Media, Film and Music > Media and Film
Subjects: G Geography. Anthropology. Recreation > GV Recreation. Leisure > GV1199 Games and amusements > GV1221 Indoor games and amusements > GV1469.15 Computer games. Video games. Fantasy games
M Music. Literature on music. Musical instruction and study > ML Literature on music > ML3800 Philosophical and societal aspects of music. Physics and acoustics of music. Physiological aspects of music
P Language and Literature > P Philology. Linguistics > P0087 Communication. Mass media
Q Science
Q Science > QA Mathematics > QA0075 Electronic computers. Computer science
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Depositing User: Carina Ellinor Irene Westling
Date Deposited: 19 May 2016 10:51
Last Modified: 19 May 2016 10:51

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