Michael Gradisar
Biographic Data
| ID | 5874140 |
|---|---|
| NAME | Michael Gradisar |
| GIVEN NAMES | Michael |
| FAMILY NAME | Gradisar |
| SIGNATURE | GRADISAR M |
| AFFILIATIONS | Flinders University |
| ORCID | 0009-0003-0211-5223 |
| VERIFIED | Yes |
| TOTAL WORKS | 17 |
| TOTAL CITATIONS | 0 |
| WORKS AS AUTHOR | 17 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 2010 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 0 |
How and when screens are used
The present study found that increased screen time in bed is linked to poorer sleep, across activity type. Future research should refine classifications, assess specific content, and employ experimental approaches to determine causal mechanisms
Validation of the Parental Understanding and Misperceptions about BAby 's Sleep Questionnaire using auto‐videosomnography
BACKGROUND: Previous studies have suggested that parental cognitions about child's sleep may be an important factor underlying pediatric sleep problems. The current study aimed to (a) develop an assessment tool measuring parental understanding and misperceptions about baby's sleep (PUMBA-Q); (b) validate the questionnaire using self-report and objective sleep measures. METHODS: There were 1,420 English-speaking caregivers (68.0% mothers, 46.8% of…
Sleeping through Covid‐19
Background With the outbreak of the COVID‐19 pandemic, pediatric experts called attention to the potential adverse effects of living restrictions (e.g., lockdown) on child well‐being, but at the same time– acknowledged their possible benefits. To date, only few data‐driven reports have been published on child sleep during COVID‐19, and all have been based on parent‐ or self‐reports. This study used auto‐videosomnography to capture the effects of …
Understanding Sleep-Wake Behavior in Late Chronotype Adolescents
Our findings suggest that with increasing lateness, the likelihood of experiencing poor sleep quality and mood disorders increases. As DLMO did not predict bedtime, our data indicate that the factors contributing to a late chronotype are versatile and complex, particularly for extreme late types. Further studies involving a larger and gender-balanced sample are needed to confirm findings
Evaluation of a Brief Sleep Intervention Designed to Improve the Sleep, Mood, and Cognitive Performance of Esports Athletes
This study evaluated a brief sleep intervention designed to improve the sleep, mood, and cognitive performance of professional electronic sports (esports) athletes from three major esports regions (i.e., Asia, North America, and Oceania). Fifty-six esports athletes from South Korea (N = 34), the United States (N = 7), and Australia (N = 15) completed the study. Participants completed an initial 2-week pre-intervention phase to establish a baselin…
Sleep and physical activity – the dynamics of bi-directional influences over a fortnight
Sleep duration and PA are bi-directionally linked, but only for vigorous physical activity. More time spent in VPA shortens sleep the next night, yet longer sleep duration increases VPA the next day. The results imply that a 24-h framing for the interrelations of sleep and physical activity is not sufficient - the dynamics can even extend beyond, and are activated specifically for the links between sleep duration and vigorous activity. The result…
Let’s Talk about Sleep Baby
The postpartum period may pose a considerable challenge for both parent sleep and sexual activity. This study assessed the links between partnered sexual frequency and satisfaction postpartum and parent sleep, infant sleep, parent nighttime caregiving, and parent-infant room sharing. Participants were 897 parents of infants aged 1-18-months ( M = 8.8 ± 4.3, 49% girls). Parents completed an online survey about their sexual frequency and satisfacti…
Is It Time We Stop Discouraging Evening Physical Activity? New Real-World Evidence From 150,000 Nights
Professional and colloquial sleep hygiene guidelines advise against evening physical activity, despite meta-analyses of laboratory studies concluding that evening exercise does not impair sleep. This study is the first to investigate the association between objectively measured evening physical activity and sleep within a real-world big-data sample. A total of 153,154 nights from 12,638 individuals aged 18–60 years ( M = 40.1 SD = 10.1; 44.5% fem…
Sleep Characteristics and Mood of Professional Esports Athletes
Esports is becoming increasingly professionalized, yet research on performance management is remarkably lacking. The present study aimed to investigate the sleep and mood of professional esports athletes. Participants were 17 professional esports athletes from South Korea ( N = 8), Australia ( N = 4), and the United States ( N = 5) who played first person shooter games (mean age 20 ± 3.5 years, 100% male). All participants wore a wrist-activity m…
Perfectionism and insomnia in adolescents
INTRODUCTION: Perfectionism is an often overlooked yet consistent construct related to insomnia in the scientific literature. Perfectionism and insomnia are both highly prevalent in adolescence. However, there is a dearth of research examining mechanisms linking perfectionism with insomnia, particularly in young people. The current study aimed to investigate whether vulnerability to stress, a factor common to both constructs, accounts for the rel…
Self‐reported sleep patterns and quality amongst adolescents
BACKGROUND: Sleep problems are common in adolescence, and frequently comorbid with both anxiety and depression. Research studies have suggested a bidirectional relationship between sleep and psychopathology, which includes evidence that sleep interventions can alleviate symptoms of anxiety and depression. However, little is known about the nature of sleep problems amongst adolescents with anxiety and depression, and whether specific sleeping diff…
Is sleep the red flag to psychopathology’s bull
‘Hippocrates flagged the value of sleep for good health’ was the first line of the Annual Research Review (ARR) by Gregory and Sadeh (2016) in this journal, titled Sleep problems in childhood psychiatric disorders – a review of the latest science . Where Hippocrates has been referred to as the ‘Father of Medicine’, Professor Avi Sadeh has been respected as a ‘Father of Paediatric Sleep Medicine’ by those who had the privilege to meet him or read …
Protective and risk factors for adolescent sleep
A meta-analysis and model of the relationship between sleep and depression in adolescents
Toward a consensus definition of pathological video-gaming
Recent worldwide sleep patterns and problems during adolescence
Electronic media use and sleep in school-aged children and adolescents
No prominent works on this page.
Electronic media use and sleep in school-aged children and adolescents
Recent worldwide sleep patterns and problems during adolescence
Toward a consensus definition of pathological video-gaming
A meta-analysis and model of the relationship between sleep and depression in adolescents
Protective and risk factors for adolescent sleep
Perfectionism and insomnia in adolescents
INTRODUCTION: Perfectionism is an often overlooked yet consistent construct related to insomnia in the scientific literature. Perfectionism and insomnia are both highly prevalent in adolescence. However, there is a dearth of research examining mechanisms linking perfectionism with insomnia, particularly in young people. The current study aimed to investigate whether vulnerability to stress, a factor common to both constructs, accounts for the rel…
Self‐reported sleep patterns and quality amongst adolescents
BACKGROUND: Sleep problems are common in adolescence, and frequently comorbid with both anxiety and depression. Research studies have suggested a bidirectional relationship between sleep and psychopathology, which includes evidence that sleep interventions can alleviate symptoms of anxiety and depression. However, little is known about the nature of sleep problems amongst adolescents with anxiety and depression, and whether specific sleeping diff…
Is sleep the red flag to psychopathology’s bull
‘Hippocrates flagged the value of sleep for good health’ was the first line of the Annual Research Review (ARR) by Gregory and Sadeh (2016) in this journal, titled Sleep problems in childhood psychiatric disorders – a review of the latest science . Where Hippocrates has been referred to as the ‘Father of Medicine’, Professor Avi Sadeh has been respected as a ‘Father of Paediatric Sleep Medicine’ by those who had the privilege to meet him or read …
Is It Time We Stop Discouraging Evening Physical Activity? New Real-World Evidence From 150,000 Nights
Professional and colloquial sleep hygiene guidelines advise against evening physical activity, despite meta-analyses of laboratory studies concluding that evening exercise does not impair sleep. This study is the first to investigate the association between objectively measured evening physical activity and sleep within a real-world big-data sample. A total of 153,154 nights from 12,638 individuals aged 18–60 years ( M = 40.1 SD = 10.1; 44.5% fem…
Sleep Characteristics and Mood of Professional Esports Athletes
Esports is becoming increasingly professionalized, yet research on performance management is remarkably lacking. The present study aimed to investigate the sleep and mood of professional esports athletes. Participants were 17 professional esports athletes from South Korea ( N = 8), Australia ( N = 4), and the United States ( N = 5) who played first person shooter games (mean age 20 ± 3.5 years, 100% male). All participants wore a wrist-activity m…
Sleeping through Covid‐19
Background With the outbreak of the COVID‐19 pandemic, pediatric experts called attention to the potential adverse effects of living restrictions (e.g., lockdown) on child well‐being, but at the same time– acknowledged their possible benefits. To date, only few data‐driven reports have been published on child sleep during COVID‐19, and all have been based on parent‐ or self‐reports. This study used auto‐videosomnography to capture the effects of …
Understanding Sleep-Wake Behavior in Late Chronotype Adolescents
Our findings suggest that with increasing lateness, the likelihood of experiencing poor sleep quality and mood disorders increases. As DLMO did not predict bedtime, our data indicate that the factors contributing to a late chronotype are versatile and complex, particularly for extreme late types. Further studies involving a larger and gender-balanced sample are needed to confirm findings
Evaluation of a Brief Sleep Intervention Designed to Improve the Sleep, Mood, and Cognitive Performance of Esports Athletes
This study evaluated a brief sleep intervention designed to improve the sleep, mood, and cognitive performance of professional electronic sports (esports) athletes from three major esports regions (i.e., Asia, North America, and Oceania). Fifty-six esports athletes from South Korea (N = 34), the United States (N = 7), and Australia (N = 15) completed the study. Participants completed an initial 2-week pre-intervention phase to establish a baselin…
Sleep and physical activity – the dynamics of bi-directional influences over a fortnight
Sleep duration and PA are bi-directionally linked, but only for vigorous physical activity. More time spent in VPA shortens sleep the next night, yet longer sleep duration increases VPA the next day. The results imply that a 24-h framing for the interrelations of sleep and physical activity is not sufficient - the dynamics can even extend beyond, and are activated specifically for the links between sleep duration and vigorous activity. The result…
Let’s Talk about Sleep Baby
The postpartum period may pose a considerable challenge for both parent sleep and sexual activity. This study assessed the links between partnered sexual frequency and satisfaction postpartum and parent sleep, infant sleep, parent nighttime caregiving, and parent-infant room sharing. Participants were 897 parents of infants aged 1-18-months ( M = 8.8 ± 4.3, 49% girls). Parents completed an online survey about their sexual frequency and satisfacti…
Validation of the Parental Understanding and Misperceptions about BAby 's Sleep Questionnaire using auto‐videosomnography
BACKGROUND: Previous studies have suggested that parental cognitions about child's sleep may be an important factor underlying pediatric sleep problems. The current study aimed to (a) develop an assessment tool measuring parental understanding and misperceptions about baby's sleep (PUMBA-Q); (b) validate the questionnaire using self-report and objective sleep measures. METHODS: There were 1,420 English-speaking caregivers (68.0% mothers, 46.8% of…
How and when screens are used
The present study found that increased screen time in bed is linked to poorer sleep, across activity type. Future research should refine classifications, assess specific content, and employ experimental approaches to determine causal mechanisms
Sleep and related disorders (13 works) · Psychology (12 works) · Medicine (11 works) · Psychiatry (11 works) · Clinical Psychology (9 works) · Insomnia (9 works) · Sleep (system call (6 works) · Clinical Psychology (5 works) · Sleep and Wakefulness Research (5 works) · Anxiety (4 works)