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Nicole Lamond - One of the best experts on this subject based on the ideXlab platform.
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the sensitivity of a palm based Psychomotor Vigilance Task to severe sleep loss
Behavior Research Methods, 2008Co-Authors: Nicole Lamond, Gregory D. Roach, Jillian Dorrian, Sarah M Jay, Sally A Ferguson, Drew DawsonAbstract:In this study, we evaluated the sensitivity of a 5-min personal digital assistant—Psychomotor Vigilance test (PDA-PVT) to severe sleep loss. Twenty-one participants completed a 10-min PVT-192 and a 5-min PDA—PVT at two hourly intervals during 62 h of sustained wakefulness. For both Tasks, response speed and number of lapses (RTs > 500) per minute significantly increased with increasing hours of wakefulness. Overall, standardized response speed scores on the 5-min PDA—PVT closely tracked those of the PVT-192; however, the PDA—PVT was generally associated with more lapses/minute. Closer inspection of the data indicated that when the level of sleep loss and fatigue became more severe (i.e., Day 3), the 5-min PDA—PVT was not quite as sensitive as the 10-min PVT-192 when 2- to 10-sec foreperiods were used for both. It is likely, however, that the observed differences between the two devices was due to differences in Task length. Thus, the findings provide further evidence of the validity of the 5-min PDA—PVT as a substitute for the 10-min PVT-192, particularly in circumstances in which a shorter test is required and/or the PVT-192 is not as practical.
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can a shorter Psychomotor Vigilance Task be used as a reasonable substitute for the ten minute Psychomotor Vigilance Task
Chronobiology International, 2006Co-Authors: Gregory D. Roach, Drew Dawson, Nicole LamondAbstract:The 10 min Psychomotor Vigilance Task (PVT) is commonly used in laboratory studies to assess the impact of sleep loss, sustained wakefulness, and/or time of day on neurobehavioral performance. In field settings, though, it may be impractical for participants to perform a test of this length. The aim of this study was to identify a performance measure that is sensitive to the effects of fatigue but less burdensome than a 10 min test. Sixteen participants (11 female, 5 male; mean age=21.7 years) slept in the sleep laboratory overnight then remained awake for 28 h from 08:00 h. During every second hour, participants completed three PVTs of differing duration (10 min, 5 min, 90 sec). For the 5 min/10 min comparison, ANOVA indicated that response time was significantly affected by test length (F1,14=26.9, p<.001) and hours of wakefulness (F13,182=46.1, p<.001) but not by their interaction (F13,182=1.7, ns). There was a strong correlation between response time on the 5 and 10 min PVTs (r=.88, p<.001). For the 9...
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can a shorter Psychomotor Vigilance Task be used as a reasonable substitute for the ten minute Psychomotor Vigilance Task
Chronobiology International, 2006Co-Authors: Gregory D. Roach, Drew Dawson, Nicole LamondAbstract:The 10 min Psychomotor Vigilance Task (PVT) is commonly used in laboratory studies to assess the impact of sleep loss, sustained wakefulness, and/or time of day on neurobehavioral performance. In field settings, though, it may be impractical for participants to perform a test of this length. The aim of this study was to identify a performance measure that is sensitive to the effects of fatigue but less burdensome than a 10 min test. Sixteen participants (11 female, 5 male; mean age = 21.7 years) slept in the sleep laboratory overnight then remained awake for 28 h from 08:00 h. During every second hour, participants completed three PVTs of differing duration (10 min, 5 min, 90 sec). For the 5 min/10 min comparison, ANOVA indicated that response time was significantly affected by test length (F1,14 = 26.9, p < .001) and hours of wakefulness (F13,182 = 46.1, p < .001) but not by their interaction (F13,182 = 1.7, ns). There was a strong correlation between response time on the 5 and 10 min PVTs (r = .88, p < .001). For the 90 sec/10 min comparison, ANOVA indicated that response time was significantly affected by test length (F1,14 = 65.9, p < .001) and hours of wakefulness (F13,182 = 29.7, p < .001) as well as by their interaction (F13,182 = 6.0, p < .001). There was a strong correlation between response time on the 90 sec and 10 min PVTs (r = .77, p < .001). The effects of hours of wakefulness on neurobehavioral performance were similar for the 5 min and 10 min PVTs. In contrast, performance on the 90 sec PVT was less affected by hours of wakefulness than on the 10 min PVT. In addition, performance on the 10 min PVT was more highly correlated with the 5 min PVT than the 90 sec PVT. These data indicate that the 5 min PVT may provide a reasonable substitute for the 10 min PVT in circumstances where a test shorter than 10 min is required.
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fatigue assessment in the field validation of a hand held electronic Psychomotor Vigilance Task
Aviation Space and Environmental Medicine, 2005Co-Authors: Nicole Lamond, Drew Dawson, Gregory D. RoachAbstract:INTRODUCTION: In recent years, there has been an increasing need for a reliable and practical tool for assessing fatigue-related impairment in the field. This study investigated the sensitivity of one potential tool, a 5-min version of the Psychomotor Vigilance Task (PVT) specifically designed for use on personal digital assistants (PDA), to 28 h of sustained wakefulness. METHODS: There were 15 participants who slept in the laboratory overnight then remained awake from 08:00 (Day 1) to 12:00 (Day 2). During every second hour, they completed a 10-min PVT, a sustained attention Task that is sensitive to the effects of sleep loss and fatigue, and a 5-min PDA-PVT. RESULTS: While performance on both Tasks significantly varied as a function of hours of wakefulness, responses on the PDA-PVT were typically slower than on the PVT. When performance scores were standardized, the negative impact of increasing hours of wakefulness on performance on the 5-min PDA-PVT and 10-min PVT did not significantly differ. DISCUSSION: The findings suggest that the 5-min PDA-PVT may provide a reasonable substitute for the 10-min PVT, particularly in circumstances where a shorter test is required and/or the standard PVT is not as practical.
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fatigue assessment in the field validation of a hand held electronic Psychomotor Vigilance Task
Aviation Space and Environmental Medicine, 2005Co-Authors: Nicole Lamond, Drew Dawson, Gregory D. RoachAbstract:INTRODUCTION: In recent years, there has been an increasing need for a reliable and practical tool for assessing fatigue-related impairment in the field. This study investigated the sensitivity of one potential tool, a 5-min version of the Psychomotor Vigilance Task (PVT) specifically designed for use on personal digital assistants (PDA), to 28 h of sustained wakefulness. METHODS: There were 15 participants who slept in the laboratory overnight then remained awake from 08:00 (Day 1) to 12:00 (Day 2). During every second hour, they completed a 10-min PVT, a sustained attention Task that is sensitive to the effects of sleep loss and fatigue, and a 5-min PDA-PVT. RESULTS: While performance on both Tasks significantly varied as a function of hours of wakefulness, responses on the PDA-PVT were typically slower than on the PVT. When performance scores were standardized, the negative impact of increasing hours of wakefulness on performance on the 5-min PDA-PVT and 10-min PVT did not significantly differ. DISCUSSION: The findings suggest that the 5-min PDA-PVT may provide a reasonable substitute for the 10-min PVT, particularly in circumstances where a shorter test is required and/or the standard PVT is not as practical. Language: en
Gregory D. Roach - One of the best experts on this subject based on the ideXlab platform.
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the sensitivity of a palm based Psychomotor Vigilance Task to severe sleep loss
Behavior Research Methods, 2008Co-Authors: Nicole Lamond, Gregory D. Roach, Jillian Dorrian, Sarah M Jay, Sally A Ferguson, Drew DawsonAbstract:In this study, we evaluated the sensitivity of a 5-min personal digital assistant—Psychomotor Vigilance test (PDA-PVT) to severe sleep loss. Twenty-one participants completed a 10-min PVT-192 and a 5-min PDA—PVT at two hourly intervals during 62 h of sustained wakefulness. For both Tasks, response speed and number of lapses (RTs > 500) per minute significantly increased with increasing hours of wakefulness. Overall, standardized response speed scores on the 5-min PDA—PVT closely tracked those of the PVT-192; however, the PDA—PVT was generally associated with more lapses/minute. Closer inspection of the data indicated that when the level of sleep loss and fatigue became more severe (i.e., Day 3), the 5-min PDA—PVT was not quite as sensitive as the 10-min PVT-192 when 2- to 10-sec foreperiods were used for both. It is likely, however, that the observed differences between the two devices was due to differences in Task length. Thus, the findings provide further evidence of the validity of the 5-min PDA—PVT as a substitute for the 10-min PVT-192, particularly in circumstances in which a shorter test is required and/or the PVT-192 is not as practical.
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can a shorter Psychomotor Vigilance Task be used as a reasonable substitute for the ten minute Psychomotor Vigilance Task
Chronobiology International, 2006Co-Authors: Gregory D. Roach, Drew Dawson, Nicole LamondAbstract:The 10 min Psychomotor Vigilance Task (PVT) is commonly used in laboratory studies to assess the impact of sleep loss, sustained wakefulness, and/or time of day on neurobehavioral performance. In field settings, though, it may be impractical for participants to perform a test of this length. The aim of this study was to identify a performance measure that is sensitive to the effects of fatigue but less burdensome than a 10 min test. Sixteen participants (11 female, 5 male; mean age=21.7 years) slept in the sleep laboratory overnight then remained awake for 28 h from 08:00 h. During every second hour, participants completed three PVTs of differing duration (10 min, 5 min, 90 sec). For the 5 min/10 min comparison, ANOVA indicated that response time was significantly affected by test length (F1,14=26.9, p<.001) and hours of wakefulness (F13,182=46.1, p<.001) but not by their interaction (F13,182=1.7, ns). There was a strong correlation between response time on the 5 and 10 min PVTs (r=.88, p<.001). For the 9...
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can a shorter Psychomotor Vigilance Task be used as a reasonable substitute for the ten minute Psychomotor Vigilance Task
Chronobiology International, 2006Co-Authors: Gregory D. Roach, Drew Dawson, Nicole LamondAbstract:The 10 min Psychomotor Vigilance Task (PVT) is commonly used in laboratory studies to assess the impact of sleep loss, sustained wakefulness, and/or time of day on neurobehavioral performance. In field settings, though, it may be impractical for participants to perform a test of this length. The aim of this study was to identify a performance measure that is sensitive to the effects of fatigue but less burdensome than a 10 min test. Sixteen participants (11 female, 5 male; mean age = 21.7 years) slept in the sleep laboratory overnight then remained awake for 28 h from 08:00 h. During every second hour, participants completed three PVTs of differing duration (10 min, 5 min, 90 sec). For the 5 min/10 min comparison, ANOVA indicated that response time was significantly affected by test length (F1,14 = 26.9, p < .001) and hours of wakefulness (F13,182 = 46.1, p < .001) but not by their interaction (F13,182 = 1.7, ns). There was a strong correlation between response time on the 5 and 10 min PVTs (r = .88, p < .001). For the 90 sec/10 min comparison, ANOVA indicated that response time was significantly affected by test length (F1,14 = 65.9, p < .001) and hours of wakefulness (F13,182 = 29.7, p < .001) as well as by their interaction (F13,182 = 6.0, p < .001). There was a strong correlation between response time on the 90 sec and 10 min PVTs (r = .77, p < .001). The effects of hours of wakefulness on neurobehavioral performance were similar for the 5 min and 10 min PVTs. In contrast, performance on the 90 sec PVT was less affected by hours of wakefulness than on the 10 min PVT. In addition, performance on the 10 min PVT was more highly correlated with the 5 min PVT than the 90 sec PVT. These data indicate that the 5 min PVT may provide a reasonable substitute for the 10 min PVT in circumstances where a test shorter than 10 min is required.
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fatigue assessment in the field validation of a hand held electronic Psychomotor Vigilance Task
Aviation Space and Environmental Medicine, 2005Co-Authors: Nicole Lamond, Drew Dawson, Gregory D. RoachAbstract:INTRODUCTION: In recent years, there has been an increasing need for a reliable and practical tool for assessing fatigue-related impairment in the field. This study investigated the sensitivity of one potential tool, a 5-min version of the Psychomotor Vigilance Task (PVT) specifically designed for use on personal digital assistants (PDA), to 28 h of sustained wakefulness. METHODS: There were 15 participants who slept in the laboratory overnight then remained awake from 08:00 (Day 1) to 12:00 (Day 2). During every second hour, they completed a 10-min PVT, a sustained attention Task that is sensitive to the effects of sleep loss and fatigue, and a 5-min PDA-PVT. RESULTS: While performance on both Tasks significantly varied as a function of hours of wakefulness, responses on the PDA-PVT were typically slower than on the PVT. When performance scores were standardized, the negative impact of increasing hours of wakefulness on performance on the 5-min PDA-PVT and 10-min PVT did not significantly differ. DISCUSSION: The findings suggest that the 5-min PDA-PVT may provide a reasonable substitute for the 10-min PVT, particularly in circumstances where a shorter test is required and/or the standard PVT is not as practical.
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fatigue assessment in the field validation of a hand held electronic Psychomotor Vigilance Task
Aviation Space and Environmental Medicine, 2005Co-Authors: Nicole Lamond, Drew Dawson, Gregory D. RoachAbstract:INTRODUCTION: In recent years, there has been an increasing need for a reliable and practical tool for assessing fatigue-related impairment in the field. This study investigated the sensitivity of one potential tool, a 5-min version of the Psychomotor Vigilance Task (PVT) specifically designed for use on personal digital assistants (PDA), to 28 h of sustained wakefulness. METHODS: There were 15 participants who slept in the laboratory overnight then remained awake from 08:00 (Day 1) to 12:00 (Day 2). During every second hour, they completed a 10-min PVT, a sustained attention Task that is sensitive to the effects of sleep loss and fatigue, and a 5-min PDA-PVT. RESULTS: While performance on both Tasks significantly varied as a function of hours of wakefulness, responses on the PDA-PVT were typically slower than on the PVT. When performance scores were standardized, the negative impact of increasing hours of wakefulness on performance on the 5-min PDA-PVT and 10-min PVT did not significantly differ. DISCUSSION: The findings suggest that the 5-min PDA-PVT may provide a reasonable substitute for the 10-min PVT, particularly in circumstances where a shorter test is required and/or the standard PVT is not as practical. Language: en
Tzyy-ping Jung - One of the best experts on this subject based on the ideXlab platform.
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spatial filtering for eeg based regression problems in brain computer interface bci
IEEE Transactions on Fuzzy Systems, 2018Co-Authors: Jungtai King, Chunhsiang Chuang, Chinteng Lin, Tzyy-ping JungAbstract:Electroencephalogram (EEG) signals are frequently used in brain–computer interfaces (BCIs), but they are easily contaminated by artifacts and noise, so preprocessing must be done before they are fed into a machine learning algorithm for classification or regression. Spatial filters have been widely used to increase the signal-to-noise ratio of EEG for BCI classification problems, but their applications in BCI regression problems have been very limited. This paper proposes two common spatial pattern (CSP) filters for EEG-based regression problems in BCI, which are extended from the CSP filter for classification, by using fuzzy sets. Experimental results on EEG-based response speed estimation from a large-scale study, which collected 143 sessions of sustained-attention Psychomotor Vigilance Task data from 17 subjects during a 5-month period, demonstrate that the two proposed spatial filters can significantly increase the EEG signal quality. When used in LASSO and $k$ -nearest neighbors regression for user response speed estimation, the spatial filters can reduce the root-mean-square estimation error by $10.02-19.77\%$ , and at the same time increase the correlation to the true response speed by $19.39-86.47\%$ .
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Electroencephalographic and peripheral temperature dynamics during a prolonged Psychomotor Vigilance Task.
Accident; analysis and prevention, 2017Co-Authors: Enrique Molina, Daniel Sanabria, Tzyy-ping Jung, Ángel CorreaAbstract:Attention lapses and fatigue are a main source of impaired performance that can lead to accidents. This study analyzed electroencephalographic (EEG) dynamics and body skin temperature as markers of attentional fluctuations in non-sleep deprived subjects during a 45min Psychomotor Vigilance Task (PVT). Independent Component Analysis and time-frequency analysis were used to evaluate the EEG data. Results showed a positive association between distal and distal-to-proximal gradient (DPG) temperatures and reaction time (RT); increments in EEG power in alpha-, theta- and beta-band frequencies in parieto-occipital, central-medial and frontal components, were associated with poor performance (slower RT) in the Task. This generalized power increment fits with an increased activity in the default mode network, associated with attention lapses. This study highlights the potential use of the PVT as a tool to obtain individual physiological indices of Vigilance and fatigue that could be applied to other Vigilance Tasks typically performed in occupational settings.
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spatial filtering for eeg based regression problems in brain computer interface bci
arXiv: Learning, 2017Co-Authors: Jungtai King, Chunhsiang Chuang, Chinteng Lin, Tzyy-ping JungAbstract:Electroencephalogram (EEG) signals are frequently used in brain-computer interfaces (BCIs), but they are easily contaminated by artifacts and noises, so preprocessing must be done before they are fed into a machine learning algorithm for classification or regression. Spatial filters have been widely used to increase the signal-to-noise ratio of EEG for BCI classification problems, but their applications in BCI regression problems have been very limited. This paper proposes two common spatial pattern (CSP) filters for EEG-based regression problems in BCI, which are extended from the CSP filter for classification, by making use of fuzzy sets. Experimental results on EEG-based response speed estimation from a large-scale study, which collected 143 sessions of sustained-attention Psychomotor Vigilance Task data from 17 subjects during a 5-month period, demonstrate that the two proposed spatial filters can significantly increase the EEG signal quality. When used in LASSO and k-nearest neighbors regression for user response speed estimation, the spatial filters can reduce the root mean square estimation error by 10.02-19.77%, and at the same time increase the correlation to the true response speed by 19.39-86.47%.
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Tonic EEG dynamics during Psychomotor Vigilance Task
2013 6th International IEEE EMBS Conference on Neural Engineering (NER), 2013Co-Authors: Enrique Molina, Ángel Correa, Daniel Sanabria, Tzyy-ping JungAbstract:This study explored the EEG dynamics of participants performing a 45-minute long Vigilance Task. High-density EEG and subject responses were simultaneously recorded and analyzed using Independent Component Analysis and subsequent clustering of independent components. Time-frequency analysis was used to explore spectral differences in long versus short reaction time (RT) trials (i.e. trials with the fastest reaction times). Empirical results of this study showed that frontal beta and occipital alpha power increased as the RT's increased, consistent with our previous results in sustained-attention driving Tasks.
Drew Dawson - One of the best experts on this subject based on the ideXlab platform.
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the sensitivity of a palm based Psychomotor Vigilance Task to severe sleep loss
Behavior Research Methods, 2008Co-Authors: Nicole Lamond, Gregory D. Roach, Jillian Dorrian, Sarah M Jay, Sally A Ferguson, Drew DawsonAbstract:In this study, we evaluated the sensitivity of a 5-min personal digital assistant—Psychomotor Vigilance test (PDA-PVT) to severe sleep loss. Twenty-one participants completed a 10-min PVT-192 and a 5-min PDA—PVT at two hourly intervals during 62 h of sustained wakefulness. For both Tasks, response speed and number of lapses (RTs > 500) per minute significantly increased with increasing hours of wakefulness. Overall, standardized response speed scores on the 5-min PDA—PVT closely tracked those of the PVT-192; however, the PDA—PVT was generally associated with more lapses/minute. Closer inspection of the data indicated that when the level of sleep loss and fatigue became more severe (i.e., Day 3), the 5-min PDA—PVT was not quite as sensitive as the 10-min PVT-192 when 2- to 10-sec foreperiods were used for both. It is likely, however, that the observed differences between the two devices was due to differences in Task length. Thus, the findings provide further evidence of the validity of the 5-min PDA—PVT as a substitute for the 10-min PVT-192, particularly in circumstances in which a shorter test is required and/or the PVT-192 is not as practical.
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can a shorter Psychomotor Vigilance Task be used as a reasonable substitute for the ten minute Psychomotor Vigilance Task
Chronobiology International, 2006Co-Authors: Gregory D. Roach, Drew Dawson, Nicole LamondAbstract:The 10 min Psychomotor Vigilance Task (PVT) is commonly used in laboratory studies to assess the impact of sleep loss, sustained wakefulness, and/or time of day on neurobehavioral performance. In field settings, though, it may be impractical for participants to perform a test of this length. The aim of this study was to identify a performance measure that is sensitive to the effects of fatigue but less burdensome than a 10 min test. Sixteen participants (11 female, 5 male; mean age=21.7 years) slept in the sleep laboratory overnight then remained awake for 28 h from 08:00 h. During every second hour, participants completed three PVTs of differing duration (10 min, 5 min, 90 sec). For the 5 min/10 min comparison, ANOVA indicated that response time was significantly affected by test length (F1,14=26.9, p<.001) and hours of wakefulness (F13,182=46.1, p<.001) but not by their interaction (F13,182=1.7, ns). There was a strong correlation between response time on the 5 and 10 min PVTs (r=.88, p<.001). For the 9...
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can a shorter Psychomotor Vigilance Task be used as a reasonable substitute for the ten minute Psychomotor Vigilance Task
Chronobiology International, 2006Co-Authors: Gregory D. Roach, Drew Dawson, Nicole LamondAbstract:The 10 min Psychomotor Vigilance Task (PVT) is commonly used in laboratory studies to assess the impact of sleep loss, sustained wakefulness, and/or time of day on neurobehavioral performance. In field settings, though, it may be impractical for participants to perform a test of this length. The aim of this study was to identify a performance measure that is sensitive to the effects of fatigue but less burdensome than a 10 min test. Sixteen participants (11 female, 5 male; mean age = 21.7 years) slept in the sleep laboratory overnight then remained awake for 28 h from 08:00 h. During every second hour, participants completed three PVTs of differing duration (10 min, 5 min, 90 sec). For the 5 min/10 min comparison, ANOVA indicated that response time was significantly affected by test length (F1,14 = 26.9, p < .001) and hours of wakefulness (F13,182 = 46.1, p < .001) but not by their interaction (F13,182 = 1.7, ns). There was a strong correlation between response time on the 5 and 10 min PVTs (r = .88, p < .001). For the 90 sec/10 min comparison, ANOVA indicated that response time was significantly affected by test length (F1,14 = 65.9, p < .001) and hours of wakefulness (F13,182 = 29.7, p < .001) as well as by their interaction (F13,182 = 6.0, p < .001). There was a strong correlation between response time on the 90 sec and 10 min PVTs (r = .77, p < .001). The effects of hours of wakefulness on neurobehavioral performance were similar for the 5 min and 10 min PVTs. In contrast, performance on the 90 sec PVT was less affected by hours of wakefulness than on the 10 min PVT. In addition, performance on the 10 min PVT was more highly correlated with the 5 min PVT than the 90 sec PVT. These data indicate that the 5 min PVT may provide a reasonable substitute for the 10 min PVT in circumstances where a test shorter than 10 min is required.
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fatigue assessment in the field validation of a hand held electronic Psychomotor Vigilance Task
Aviation Space and Environmental Medicine, 2005Co-Authors: Nicole Lamond, Drew Dawson, Gregory D. RoachAbstract:INTRODUCTION: In recent years, there has been an increasing need for a reliable and practical tool for assessing fatigue-related impairment in the field. This study investigated the sensitivity of one potential tool, a 5-min version of the Psychomotor Vigilance Task (PVT) specifically designed for use on personal digital assistants (PDA), to 28 h of sustained wakefulness. METHODS: There were 15 participants who slept in the laboratory overnight then remained awake from 08:00 (Day 1) to 12:00 (Day 2). During every second hour, they completed a 10-min PVT, a sustained attention Task that is sensitive to the effects of sleep loss and fatigue, and a 5-min PDA-PVT. RESULTS: While performance on both Tasks significantly varied as a function of hours of wakefulness, responses on the PDA-PVT were typically slower than on the PVT. When performance scores were standardized, the negative impact of increasing hours of wakefulness on performance on the 5-min PDA-PVT and 10-min PVT did not significantly differ. DISCUSSION: The findings suggest that the 5-min PDA-PVT may provide a reasonable substitute for the 10-min PVT, particularly in circumstances where a shorter test is required and/or the standard PVT is not as practical.
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fatigue assessment in the field validation of a hand held electronic Psychomotor Vigilance Task
Aviation Space and Environmental Medicine, 2005Co-Authors: Nicole Lamond, Drew Dawson, Gregory D. RoachAbstract:INTRODUCTION: In recent years, there has been an increasing need for a reliable and practical tool for assessing fatigue-related impairment in the field. This study investigated the sensitivity of one potential tool, a 5-min version of the Psychomotor Vigilance Task (PVT) specifically designed for use on personal digital assistants (PDA), to 28 h of sustained wakefulness. METHODS: There were 15 participants who slept in the laboratory overnight then remained awake from 08:00 (Day 1) to 12:00 (Day 2). During every second hour, they completed a 10-min PVT, a sustained attention Task that is sensitive to the effects of sleep loss and fatigue, and a 5-min PDA-PVT. RESULTS: While performance on both Tasks significantly varied as a function of hours of wakefulness, responses on the PDA-PVT were typically slower than on the PVT. When performance scores were standardized, the negative impact of increasing hours of wakefulness on performance on the 5-min PDA-PVT and 10-min PVT did not significantly differ. DISCUSSION: The findings suggest that the 5-min PDA-PVT may provide a reasonable substitute for the 10-min PVT, particularly in circumstances where a shorter test is required and/or the standard PVT is not as practical. Language: en
Atul Malhotra - One of the best experts on this subject based on the ideXlab platform.
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obstructive sleep apnea and Psychomotor Vigilance Task performance
Nature and Science of Sleep, 2014Co-Authors: Salma Batoolanwar, Stefanos N Kales, Sanjay R Patel, Vasileia Varvarigou, Pamela N Deyoung, Atul MalhotraAbstract:Author(s): Batool-Anwar, Salma; Kales, Stefanos N; Patel, Sanjay R; Varvarigou, Vasileia; DeYoung, Pamela N; Malhotra, Atul | Abstract: Obstructive sleep apnea (OSA) is a highly prevalent disorder with considerable morbidity and mortality. Vigilance and attentiveness are often impaired in OSA patients. In occupational medicine settings, subjective reports of sleepiness are notoriously inaccurate, making the identification of objective measures of Vigilance potentially important for risk assessments of fitness for duty. In order to evaluate the effects of OSA on attentiveness and Vigilance, we conducted a cross-sectional study to examine the association between OSA and Psychomotor Vigilance Task (PVT) performance.Patients attending sleep clinics for evaluation of possible sleep apnea were recruited. The subjects underwent either a standard overnight laboratory polysomnography or home sleep study. Subjective daytime sleepiness was assessed by Epworth sleepiness scale, and Vigilance was tested using a portable device. The participants were asked to respond to the PVT signals using their dominant hand. Each PVT administration lasted 10 minutes, with stimuli signals appearing randomly at variable intervals of 2-10 seconds.Mean age of the participants was 46±15 years, and mean body mass index was 34.3±9.8 kg/m(2). Participants with higher Epworth scores had worse PVT performance (Pl0.05). In multivariate analyses, age, body mass index, and poor sleep efficiency (measured by Pittsburgh sleep quality index score) were associated with worse PVT performance (Pl0.05). In contrast, PVT performance did not differ significantly across categories of apnea hypopnea index severity. Subgroup analysis demonstrated that women had worse performance on all PVT measures (Pl0.05).PVT performance can be utilized for risk assessments of sleepiness and may be particularly useful among populations where subjective reports are unreliable.
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obstructive sleep apnea and Psychomotor Vigilance Task performance
Nature and Science of Sleep, 2014Co-Authors: Salma Batoolanwar, Stefanos N Kales, Sanjay R Patel, Vasileia Varvarigou, Pamela N Deyoung, Atul MalhotraAbstract:Author(s): Batool-Anwar, Salma; Kales, Stefanos N; Patel, Sanjay R; Varvarigou, Vasileia; DeYoung, Pamela N; Malhotra, Atul | Abstract: BACKGROUND:Obstructive sleep apnea (OSA) is a highly prevalent disorder with considerable morbidity and mortality. Vigilance and attentiveness are often impaired in OSA patients. In occupational medicine settings, subjective reports of sleepiness are notoriously inaccurate, making the identification of objective measures of Vigilance potentially important for risk assessments of fitness for duty. In order to evaluate the effects of OSA on attentiveness and Vigilance, we conducted a cross-sectional study to examine the association between OSA and Psychomotor Vigilance Task (PVT) performance. METHODS:Patients attending sleep clinics for evaluation of possible sleep apnea were recruited. The subjects underwent either a standard overnight laboratory polysomnography or home sleep study. Subjective daytime sleepiness was assessed by Epworth sleepiness scale, and Vigilance was tested using a portable device. The participants were asked to respond to the PVT signals using their dominant hand. Each PVT administration lasted 10 minutes, with stimuli signals appearing randomly at variable intervals of 2-10 seconds. RESULTS:Mean age of the participants was 46±15 years, and mean body mass index was 34.3±9.8 kg/m(2). Participants with higher Epworth scores had worse PVT performance (Pl0.05). In multivariate analyses, age, body mass index, and poor sleep efficiency (measured by Pittsburgh sleep quality index score) were associated with worse PVT performance (Pl0.05). In contrast, PVT performance did not differ significantly across categories of apnea hypopnea index severity. Subgroup analysis demonstrated that women had worse performance on all PVT measures (Pl0.05). CONCLUSION:PVT performance can be utilized for risk assessments of sleepiness and may be particularly useful among populations where subjective reports are unreliable.