Publications by category
Journal articles
Wong ML, Leung CNW, Lau KNT, Chung KF, Lau EYY (2022). The relationships among sleep problems, anxiety, memory complaints and compulsive checking behaviours. Journal of Obsessive-Compulsive and Related Disorders, 34
Lau EYY, Wong ML, Lam YC, Lau KNT, Chung KF, Rusak B (2021). Sleep and Inhibitory Control over Mood-Congruent Information in Emerging Adults with Depressive Disorder.
Psychosom Med,
83(9), 1004-1012.
Abstract:
Sleep and Inhibitory Control over Mood-Congruent Information in Emerging Adults with Depressive Disorder.
OBJECTIVE: Accumulating evidence has suggested bidirectionality between sleep problems and depression, but the underlying mechanism is unclear. We assessed the role of sleep in inhibitory control ability with emotional stimuli, which has been shown to be suboptimal among individuals with depression and proposed to perpetuate depressive symptoms. METHODS: Emerging adults (aged 18-25 years, 64.6% female) were screened for depressive and other mental disorders by structured clinical interview and questionnaire. Individuals with depressive disorders were assigned to have a polysomnography-monitored daytime sleep opportunity (Sleep-Dep, n = 20), whereas nondepressed individuals were randomized to either have daytime sleep (Sleep-Ctrl, n = 27) or stay awake (Wake-Ctrl, n = 18). Participants completed the Affective Go/No-Go Task two times, separated by experimental conditions. RESULTS: a factorial model with a between-subject factor (Sleep-Dep/Sleep-Ctrl/Wake-Ctrl) and a within-subject factor (test 1/test 2) was used to assess if the groups differed in inhibitory control across test sessions, as inferred by changes in d-prime and false alarm rates (FA). Results from mixed factorial models showed a significant interaction effect between time and group on FA in the block with neutral faces as the target and happy faces as the nontarget (F(2,61) = 5.15, pfdr =. 045). Although Sleep-Dep had decreased FA after sleep (t(19) = 2.94, pfdr =. 050), Sleep-Ctrl and Wake-Ctrl had no significant between-session changes (p values >. 05). Postsleep improvement in FA in Sleep-Dep correlated with longer stage 2 sleep (r(20) = 0.788, pfdr <. 001) and stage 2 fast spindle number at O1 (r(18) = 0.692, pfdr =. 015). CONCLUSIONS: Sleep gain, particularly stage 2 sleep and related physiology, potentially enhances inhibitory control ability responding to emotional information among individuals with depressive disorders.
Abstract.
Author URL.
Mark Lawrence W, Esther Yuet Ying L, Yeuk Ching L, Benjamin R, Chia-Huei T, Tatia Mei Chun L, Yun Kwok W (2020). The protective effect of daytime sleep on planning and risk-related decision-making in emerging adults.
Soc Cogn Affect Neurosci,
15(11), 1228-1237.
Abstract:
The protective effect of daytime sleep on planning and risk-related decision-making in emerging adults.
We assessed the effect of a daytime sleep opportunity on planning and risk-related decision-making in emerging adults using multiple neurobehavioral assessments. A total of 136 healthy emerging adults (20.0 ± 1.5 years), 65% female, performed the Risky-Gains Task and the Tower of London test twice. Between these assessments, they were randomized to either have a sleep opportunity monitored by polysomnography (Sleep group, n = 101) or to stay awake (Wake group, n = 35). During Test 2, in comparison to the Sleep group, the Wake group showed increased sleepiness, worse planning ability and more decrease in reaction times when selecting risky choices. Changes in Tower of London test steps used and Risky-Gains Task response time correlated with the number of central and frontal fast sleep spindles, respectively. These results indicate that among emerging adults who commonly have poor sleep patterns, a daytime sleep opportunity was related to better planning ability, better psychomotor vigilance and stable response speeds in risk-related decision-making. Changes in planning and risk-related decision-making correlated with the number of sleep spindles during the nap, supporting a specific role for sleep in modulating planning and potentially other higher-order cognitive functions.
Abstract.
Author URL.
Lau EYY, Wong ML, Rusak B, Lam YC, Wing YK, Tseng C-H, Lee TMC (2019). The coupling of short sleep duration and high sleep need predicts riskier decision making. Psychology & Health, 34(10), 1196-1213.
Wong ML, Tseng CH, Wing YK, Rusak B, Lee TMC, Lau EYY (2017). Impact of habitual short sleep and perceived sleep need on risk-taking in young people. Sleep Medicine, 40
Lau EYY, Wong ML, Lau KNT, Chung KF, Rusak B (2017). Influence of chronic short sleep and a daytime nap opportunity on emotion-related inhibitory control in young adults. Sleep Medicine, 40
Wong ML (2017). Interaction of sleep and regular exercise in adolescents’ and young adults’ working memory.
International journal of sport psychology,
48, 1-1.
Abstract:
Interaction of sleep and regular exercise in adolescents’ and young adults’ working memory
Adolescents and young adults continue to develop rapidly, especially in their high cognitive functions such as working memory. Sleep and regular exercise have been shown to affect brain and cognitive functions, and we investigated the interplay between these two factors on working memory. One hundred participants completed a sleep-exercise log, wore an acti-watch for five days and performed a working memory task on the sixth day. Regular exercisers were found to have significantly faster response time on the working memory task than non-regular exercisers, and such effect was moderated by actigraphy-measured total sleep time. In other words, regular exercisers had faster reaction time than non-regular exercisers only when they had sufficient sleep (>6.5hours). Our findings showed that both healthy sleep and regular exercise habits should be promoted among adolescents and young adults to optimize cognitive development.
Abstract.
Wong ML, Lau KNT, Espie CA, Luik AI, Kyle SD, Lau EYY (2017). Psychometric properties of the Sleep Condition Indicator and Insomnia Severity Index in the evaluation of insomnia disorder. Sleep Medicine, 33, 76-81.
Wong ML, Zhang J, Wing YK, Lau EYY (2016). Sleep-related daytime consequences mediated the neuroticism–depression link. Sleep and Biological Rhythms, 15(1), 21-30.
Lau EYY, Wong ML, Lau KNT, Hui FWY, Tseng C-H (2015). Rapid-Eye-Movement-Sleep (REM) Associated Enhancement of Working Memory Performance after a Daytime Nap. PLOS ONE, 10(5), e0125752-e0125752.
Wong M, Lau E, Wing Y (2015). Sleep and working memory among individuals with depressive and anxiety disorders. Sleep Medicine, 16, s69-s70.
Lee Y, Hung P, Wong M, Lau E (2015). The effect of daytime sleep opportunity on risky decision-making. Sleep Medicine, 16
Wong M, Leung C, Lau E (2015). The role of insomnia in memory complaint among compulsive checkers. Sleep Medicine, 16
Lee TMC, Wong ML, Lau BW-M, Lee JC-D, Yau S-Y, So K-F (2014). Aerobic exercise interacts with neurotrophic factors to predict cognitive functioning in adolescents. Psychoneuroendocrinology, 39, 214-224.
Wong ML, Lau EYY, Wan JHY, Cheung SF, Hui CH, MOK DSY (2013). The interplay between sleep and mood in predicting academic functioning, physical health and psychological health: a longitudinal study. Journal of Psychosomatic Research, 74(4), 271-277.
Lau EYY, Wong ML, Ng ECW, Hui C-CH, Cheung SF, Mok DSY (2013). “Social Jetlag” in Morning-Type College Students Living on Campus: Implications for Physical and Psychological Well-being. Chronobiology International, 30(7), 910-918.
Conferences
Lau EYY, Wong ML, Lau KNT, Lam YC (2020). Effects of night-time sleep quantity, quality and timing on the architecture of a daytime nap.
Author URL.
Wong ML, Lau EYY, Lam YC (2020). Sleep to stop the decline of planning and risk-related decision-making ability during the day.
Author URL.
Wong ML, Leung CNW, Lau KNT, Lau EYY (2020). The role of sleep problems in the cognitive behavioural model of compulsive checking behaviours.
Author URL.
Publications by year
2022
Wong ML, Leung CNW, Lau KNT, Chung KF, Lau EYY (2022). The relationships among sleep problems, anxiety, memory complaints and compulsive checking behaviours. Journal of Obsessive-Compulsive and Related Disorders, 34
2021
Lau EYY, Wong ML, Lam YC, Lau KNT, Chung KF, Rusak B (2021). Sleep and Inhibitory Control over Mood-Congruent Information in Emerging Adults with Depressive Disorder.
Psychosom Med,
83(9), 1004-1012.
Abstract:
Sleep and Inhibitory Control over Mood-Congruent Information in Emerging Adults with Depressive Disorder.
OBJECTIVE: Accumulating evidence has suggested bidirectionality between sleep problems and depression, but the underlying mechanism is unclear. We assessed the role of sleep in inhibitory control ability with emotional stimuli, which has been shown to be suboptimal among individuals with depression and proposed to perpetuate depressive symptoms. METHODS: Emerging adults (aged 18-25 years, 64.6% female) were screened for depressive and other mental disorders by structured clinical interview and questionnaire. Individuals with depressive disorders were assigned to have a polysomnography-monitored daytime sleep opportunity (Sleep-Dep, n = 20), whereas nondepressed individuals were randomized to either have daytime sleep (Sleep-Ctrl, n = 27) or stay awake (Wake-Ctrl, n = 18). Participants completed the Affective Go/No-Go Task two times, separated by experimental conditions. RESULTS: a factorial model with a between-subject factor (Sleep-Dep/Sleep-Ctrl/Wake-Ctrl) and a within-subject factor (test 1/test 2) was used to assess if the groups differed in inhibitory control across test sessions, as inferred by changes in d-prime and false alarm rates (FA). Results from mixed factorial models showed a significant interaction effect between time and group on FA in the block with neutral faces as the target and happy faces as the nontarget (F(2,61) = 5.15, pfdr =. 045). Although Sleep-Dep had decreased FA after sleep (t(19) = 2.94, pfdr =. 050), Sleep-Ctrl and Wake-Ctrl had no significant between-session changes (p values >. 05). Postsleep improvement in FA in Sleep-Dep correlated with longer stage 2 sleep (r(20) = 0.788, pfdr <. 001) and stage 2 fast spindle number at O1 (r(18) = 0.692, pfdr =. 015). CONCLUSIONS: Sleep gain, particularly stage 2 sleep and related physiology, potentially enhances inhibitory control ability responding to emotional information among individuals with depressive disorders.
Abstract.
Author URL.
2020
Lau EYY, Wong ML, Lau KNT, Lam YC (2020). Effects of night-time sleep quantity, quality and timing on the architecture of a daytime nap.
Author URL.
Wong ML, Lau EYY, Lam YC (2020). Sleep to stop the decline of planning and risk-related decision-making ability during the day.
Author URL.
Mark Lawrence W, Esther Yuet Ying L, Yeuk Ching L, Benjamin R, Chia-Huei T, Tatia Mei Chun L, Yun Kwok W (2020). The protective effect of daytime sleep on planning and risk-related decision-making in emerging adults.
Soc Cogn Affect Neurosci,
15(11), 1228-1237.
Abstract:
The protective effect of daytime sleep on planning and risk-related decision-making in emerging adults.
We assessed the effect of a daytime sleep opportunity on planning and risk-related decision-making in emerging adults using multiple neurobehavioral assessments. A total of 136 healthy emerging adults (20.0 ± 1.5 years), 65% female, performed the Risky-Gains Task and the Tower of London test twice. Between these assessments, they were randomized to either have a sleep opportunity monitored by polysomnography (Sleep group, n = 101) or to stay awake (Wake group, n = 35). During Test 2, in comparison to the Sleep group, the Wake group showed increased sleepiness, worse planning ability and more decrease in reaction times when selecting risky choices. Changes in Tower of London test steps used and Risky-Gains Task response time correlated with the number of central and frontal fast sleep spindles, respectively. These results indicate that among emerging adults who commonly have poor sleep patterns, a daytime sleep opportunity was related to better planning ability, better psychomotor vigilance and stable response speeds in risk-related decision-making. Changes in planning and risk-related decision-making correlated with the number of sleep spindles during the nap, supporting a specific role for sleep in modulating planning and potentially other higher-order cognitive functions.
Abstract.
Author URL.
Wong ML, Leung CNW, Lau KNT, Lau EYY (2020). The role of sleep problems in the cognitive behavioural model of compulsive checking behaviours.
Author URL.
2019
Lau EYY, Wong ML, Rusak B, Lam YC, Wing YK, Tseng C-H, Lee TMC (2019). The coupling of short sleep duration and high sleep need predicts riskier decision making. Psychology & Health, 34(10), 1196-1213.
2017
Wong ML, Tseng CH, Wing YK, Rusak B, Lee TMC, Lau EYY (2017). Impact of habitual short sleep and perceived sleep need on risk-taking in young people. Sleep Medicine, 40
Lau EYY, Wong ML, Lau KNT, Chung KF, Rusak B (2017). Influence of chronic short sleep and a daytime nap opportunity on emotion-related inhibitory control in young adults. Sleep Medicine, 40
Wong ML (2017). Interaction of sleep and regular exercise in adolescents’ and young adults’ working memory.
International journal of sport psychology,
48, 1-1.
Abstract:
Interaction of sleep and regular exercise in adolescents’ and young adults’ working memory
Adolescents and young adults continue to develop rapidly, especially in their high cognitive functions such as working memory. Sleep and regular exercise have been shown to affect brain and cognitive functions, and we investigated the interplay between these two factors on working memory. One hundred participants completed a sleep-exercise log, wore an acti-watch for five days and performed a working memory task on the sixth day. Regular exercisers were found to have significantly faster response time on the working memory task than non-regular exercisers, and such effect was moderated by actigraphy-measured total sleep time. In other words, regular exercisers had faster reaction time than non-regular exercisers only when they had sufficient sleep (>6.5hours). Our findings showed that both healthy sleep and regular exercise habits should be promoted among adolescents and young adults to optimize cognitive development.
Abstract.
Wong ML, Lau KNT, Espie CA, Luik AI, Kyle SD, Lau EYY (2017). Psychometric properties of the Sleep Condition Indicator and Insomnia Severity Index in the evaluation of insomnia disorder. Sleep Medicine, 33, 76-81.
2016
Wong ML, Zhang J, Wing YK, Lau EYY (2016). Sleep-related daytime consequences mediated the neuroticism–depression link. Sleep and Biological Rhythms, 15(1), 21-30.
2015
Lau EYY, Wong ML, Lau KNT, Hui FWY, Tseng C-H (2015). Rapid-Eye-Movement-Sleep (REM) Associated Enhancement of Working Memory Performance after a Daytime Nap. PLOS ONE, 10(5), e0125752-e0125752.
Wong M, Lau E, Wing Y (2015). Sleep and working memory among individuals with depressive and anxiety disorders. Sleep Medicine, 16, s69-s70.
Lee Y, Hung P, Wong M, Lau E (2015). The effect of daytime sleep opportunity on risky decision-making. Sleep Medicine, 16
Wong M, Leung C, Lau E (2015). The role of insomnia in memory complaint among compulsive checkers. Sleep Medicine, 16
2014
Lee TMC, Wong ML, Lau BW-M, Lee JC-D, Yau S-Y, So K-F (2014). Aerobic exercise interacts with neurotrophic factors to predict cognitive functioning in adolescents. Psychoneuroendocrinology, 39, 214-224.
2013
Wong ML, Lau EYY, Wan JHY, Cheung SF, Hui CH, MOK DSY (2013). The interplay between sleep and mood in predicting academic functioning, physical health and psychological health: a longitudinal study. Journal of Psychosomatic Research, 74(4), 271-277.
Lau EYY, Wong ML, Ng ECW, Hui C-CH, Cheung SF, Mok DSY (2013). “Social Jetlag” in Morning-Type College Students Living on Campus: Implications for Physical and Psychological Well-being. Chronobiology International, 30(7), 910-918.