Sleep Deprivation and Cognitive Performance

Killgore, William D. S.; Weber, Marcel

doi:10.1007/978-1-4614-9087-6_16

Cited by 33 publications

(25 citation statements)

References 106 publications

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“…What is more, scaling the amount of time available a day at the expense of sleep is ineffective. Sleep deprivation has been proven to affect cognitive functions [20,2] and subsequently memory consolidation and recall [35,3,38]. Moreover, such deprivation may cause serious health problems [12,6,27].…”

Section: Withdrawal Reasons Analysismentioning

confidence: 99%

Building engagement for MOOC students

Nawrot

Doucet

2014

Proceedings of the 23rd International Conference on World Wide Web

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The main objectives of massive open online courses (MOOC) are to foster knowledge through free high quality learning materials procurement; to create new knowledge through diverse users' interactions with the providing platform; and to empower research on learning. However, MOOC providers are also businesses (either profit or not-for-profit). They are still in the early stages of their development, but sooner or later, in order to secure their existence and assure their longterm growth, they will have to adapt a business model and monetize the services they provide. Nevertheless, despite their popularity MOOCs are characterized by a very high drop-out rate (about 90% [33,22,26]), which may turn out to be a problem regardless of the adapted business model. Hence, MOOC providers can either assume the scale benefits to be sufficiently high to ignore the problem of low MOOC completion rate or tackle this problem.In this paper we explore the problem of the high dropout rate in massive open online courses. First, we identify its main cause by conducting an online survey, namely bad time organization. Secondly, we provide suggestions to reduce the rate. Specifically, we argue that MOOC platforms should not only provide their users with high quality educational materials and interaction facilities. But they should also support and assist the users in their quest for knowledge. Thus, MOOC platforms should provide tools helping them optimize their time usage and subsequently develop metacognitive skills indispensable in proper time management of learning processes.

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Section: Withdrawal Reasons Analysismentioning

confidence: 99%

Building engagement for MOOC students

Nawrot

Doucet

2014

Proceedings of the 23rd International Conference on World Wide Web

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“…The inclusion of the number of hours of sleep as a covariate is based on a study by Muehlhan, Marxen, Landsiedel, Malberg and Zaunseder [56], which showed that the quality of sleep affected the performance of a group of participants in an N-back working memory task when the task was carried out in a supine body posture, but not when in a sitting posture. Although our measurement only indicates the number of hours of sleep and not the quality of sleep, we decided to use it as a covariate because of its potential predictive value, since sleep deprivation itself has also been shown to affect memory [57]. The covariate exercise was included not only due to the fact that physical activity has been shown to be beneficial for memory [58,59], but also because we contemplated the possibility that exercising regularly could enhance one's body awareness, which would make body-related memory cues more salient, modulating postural-dependent memory effects.…”

Section: Methodsmentioning

confidence: 99%

Absence of posture-dependent and posture-congruent memory effects on the recall of action sentences

et al. 2019

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In two experiments with large samples of participants, we explored contextual memory effects associated with body posture, which was considered a physical and proprioceptive context and, therefore, potentially relevant to the encoding and retrieval of information. In Experiment 1 (N = 128), we studied the effect of context dependence on memory by manipulating the body posture adopted by the participants during the incidental encoding and subsequent recall of a series of action sentences not intrinsically associated with particular body postures (e.g., “to put on a pair of glasses”, “to look at a postcard”). Memory performance was not affected by context manipulation, as reflected by the absence of significant differences between remembering while in the posture adopted at study or in a different posture. Experiment 2 (N = 85) was designed to analyze context congruency memory effects, and for that purpose we manipulated the participants' body posture during the recall of sentences that described actions usually performed in body postures that were congruent or incongruent with the posture of the participants (e.g., recalling the sentence “to travel by taxi” while sitting or while standing). A content-neutral posture (lying) was used for the incidental encoding phase. Memory performance was not affected by contextual congruency at the time of recall, as evidenced by the lack of significant differences between recalling in a posture congruent with the content to be recalled and recalling in an alternative posture. Bayesian analyses supported the strength of null findings in the two experiments, adding to the evidence that, when taken together, the results in this study clearly failed to show contextual memory effects of body posture on the recall of action-related verbal statements.

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“…Due to insufficient diversity in input device usage (not enough observation to counterbalance), only data collected from subjects using mice as pointing device were considered in the analysis. Further, the results collected from participants who reported: 1) having disability or technical problem potentially impairing the performance in the experiment; 2) sleeping less than 6 hours a night before [37,38]; 3) drinking alcohol or taking drugs (e.g. strong painkillers) 24 hours before the survey; were automatically excluded from the analysis as all of the above listed factors can negatively impact the cognitive performance.…”

Section: Methodsmentioning

confidence: 99%

Timeline Localization

Nawrot

Doucet

2014

Lecture Notes in Computer Science

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The research findings provide evidence that time-oriented data visualizations can contribute to faster information processing, better understanding and improved recall. Thus, they are used in many application domains-medicine, law enforcement, traffic and navigation control to name but a few. Simultaneously, human's time perception varies depending inter alia on culture, language, personal experience and situational factors. Although, the differences caused by the aforementioned aspects were acknowledged and addressed in the Human Computer Interaction (HCI) field for decades their impact on time-oriented data visualizations was largely neglected. To fill this gap, we investigate the influence of time spatializations (organization of time along axes) on the response time and accuracy of inferences based on time-oriented data visualizations. Moreover, we examine users' preferences toward different time arrangements. Our findings show that user-adapted organization of time along axes can speed up the decision-making process and increase the user experience.

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Sleep Deprivation and Cognitive Performance

Cited by 33 publications

References 106 publications

Building engagement for MOOC students

Building engagement for MOOC students

Absence of posture-dependent and posture-congruent memory effects on the recall of action sentences

Timeline Localization

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