Pottas, Lidia2019-07-082019-07-082019/04/102018Jani, RR 2018, The impact of short-term sleep deprivation on listening effort and P300 responses, MA Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/70596>A2019http://hdl.handle.net/2263/70596Dissertation (MA)--University of Pretoria, 2018.Objective: The present study aimed to determine the impact of 24-hour sleep deprivation on listening effort and P300 responses in a group of young university students. Method: A quasi-experimental, within-subject, repeated measures design was employed. Twenty-seven young students aged between 19 and 25 years (M: 22.56, SD: 1.16) underwent four assessments over a period of three days. Assessments were conducted during the mornings (6:00) and evenings (18:00), starting with the evening baseline assessment prior to the normal sleep routine. Sleep deprivation of 24 hours was undertaken from the morning of day two. On the morning of day three, experimental measurements were obtained under sleep deprivation conditions. The assessments comprised of the Profile of Mood States (POMS) questionnaire, dual-task paradigm LE test, and P300 using an odd-ball stimulus protocol. Results: A statistically significant difference (p<0.01) was obtained for the POMS assessment before and after the sleep deprivation condition, with increased measures of fatigue and decreased vigour, confirming subjective fatigue after sleep deprivation. P300 responses also displayed a statistically significant increase in response latency and decrease in amplitude after sleep deprivation (p<0.05). However, the LE test demonstrated no statistically significant differences (p>0.05) amongst all listening situations after sleep deprivation. Conclusion: The results demonstrated that the participants’ mood states, according to the POMS, were displaced. A cognitive decline was experienced in relation to the higher executive functions associated with the P300 assessment as evidenced by the change in latency and amplitude. Despite this, it was evident from the LE evaluation that less LE was used after sleep deprivation in the majority of the listening situations. It is possible that LE was unaffected by the detrimental influence of sleep deprivation. Other possible reasons for the unexpected results, namely the influence of the amount of sleep deprivation, population choice, the LE task combination, setting of priority during LE test, and intra-subject variables, were discussed.en© 2019 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.UCTDDissertation12077535