Validity of the Japanese Version of the Morningness-Eveningness Questionnaire

Ishihara, Kaneyoshi; Saitoh, Takashi; Inoue, Yosuke; Miyata, Yô

doi:10.2466/pms.1984.59.3.863

Cited by 84 publications

(66 citation statements)

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“…Only females were selected for the present study because it was difficult to find a male participant who met the selection criteria. All of the participants met the following criteria: (1) a normal sleep-wake cycle classified as "intermediate type" according to the Morningness-Eveningness questionnaire 29,30) ; (2) no report of any physical or mental health problems, and a score <15 on the Center for Epidemiological Studies-Depression Scale (CES-D) 31) ; (3) no experience of shift work within the 3 months prior to the experiment; (4) no travel to a different time zone within the 3 months prior to the experiment; (5) no use of medication; (6) non-smoker, and (7) a body mass index less than 25 (calculated as weight in kilograms divided by the square of the height in meters, BMI). The participants' Morningness-Eveningness score, CES-D score, and BMI (mean ± standard deviation) score were 53.8 ± 4.38, 7.2 ± 5.99, and 21.6 ± 2.71 kg/m 2 , respectively.…”

Section: Participants and Designmentioning

confidence: 99%

A Short Nap and Natural Bright Light Exposure Improve Positive Mood Status

2007

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While the effects of a short nap on performance and arousal level have been well investigated, less attention has been paid to its effects on mood status. The aim of the present study was to examine the effects of a short nap and natural bright light exposure on mood status. Participants were 16 healthy females who were on average 38.1 (SD = 2.68) yr old. From 11:00 to 12:00, the participants carried out a set of tasks twice with baseline lighting (<100 lux). From 12:40 to 13:10, they were subjected to three experimental conditions: control (<100 lux), natural bright light (>2,000 lux), and a 20-min nap. From 13:10 to 16:10, the tasks were repeated six times with the baseline lighting. To measure mood status, multiple visual analogue scales (to measure anxiety, sadness, anger, confusion, apathy, fatigue, and sleepiness) and the Mood Check List 3 (MCL-3) (to derive "pleasantness", "satisfaction" and "relaxation") were employed. The results showed that brief (30 min) natural bright light exposure improved one dimension of mood status, "pleasantness". A short nap also improved dimensions of mood status ("pleasantness", "satisfaction", and "relaxation"). These results suggest that the proper application of both natural light and a short nap shifts the mood status to the positive/favorable side.

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Section: Participants and Designmentioning

confidence: 99%

A Short Nap and Natural Bright Light Exposure Improve Positive Mood Status

2007

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“…Eleven of the subjects were intermediate type and one was moderately evening type, as assessed by the Japanese version of Morningness-Eveningness Questionnaire. 12 Before the study, the subjects were instructed that the purpose of the study was to determine whether a brief nap after lunch improves, has no effect on, or worsens subsequent alertness and performance after a short sleep at night. The experimental protocol was approved by the ethics committee of our institute.…”

Section: Subjectsmentioning

confidence: 99%

Maintenance of Alertness and Performance by a Brief Nap After Lunch Under Prior Sleep Deficit

Takahashi¹,

Arito²

2000

Sleep

115

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. National surveys in the past five years have shown a 7% increase in the number of workers sleeping six hours or less and a 9% decrease in those sleeping seven hours or more. 1 Decreased nocturnal sleep can lead to sleepiness, errors, and accidents during the daytime. 2 Even after a normal sleep at night, the mid-afternoon period (around 14:00) is characterized by decreased alertness, poor performance, and frequent errors in the workplace; or what has been recognized as the "post-lunch dip." 3-5 Thus, it is important to seek practical solutions to diminished daytime function resulting from less sleep.Recent research has documented that naps of less than 30 minutes are a promising strategy for counteracting the effects of a short sleep period of 4-5 hours the preceding night. [6][7][8][9] This research evaluated the roles of repeated (polyphasic) naps or a single nap taken in the morning or mid-afternoon. Such patterns of napping, however, seem unfeasible in most work settings, because of the obvious conflict with work schedules. In a previous study, we hypothesized that a post-lunch rest is an appropriate time to take a nap in the workplace, and therefore investigated the effects of a 15-minute nap taken at 12:30. 10 The results showed greater alertness and performance after the 15-min ute nap than after no nap or a 45-minute nap. These findings are in agreement with the latest evidence showing improved alertness after a 20-minute nap scheduled at 12:20 in a study in which the effects of meals and time cues were controlled. 11 However, since the subjects in both studies had a normal sleep the night before testing, the effects of a post-lunch nap following a short sleep remain to be determined.The purpose of the present study was to examine whether a 15-minute nap taken during post-lunch rest improves subsequent alertness and performance under prior sleep deficit. The effects of the nap were assessed by the P300 event-related potential (ERP) and neurobehavioral tasks. We also investigated the autonomic effects of the nap by measuring the electrocardiographic (ECG) R-R interval variability. METHODS SubjectsTwelve healthy students served as subjects for this experiment (7 males and 5 females, mean age 22.1±1.6 SD years). None of them reported sleep complaints or any history of medical disorders. Their habitual sleep duration was Abstract: We examined the effects of a 15-min nap after lunch on subsequent alertness, performance, and autonomic function following a short sleep the preceding night. Subjects were 12 healthy students who had slept for only 4 hours the night before being tested. They experienced both nap and no-nap conditions in a counterbalanced order, at least a week apart. The nap condition included a 15-min nap opportunity (12:30-12:45) in bed with polygraphic monitoring. We measured the P300 event-related potential, subjective sleepiness (Visual Analog Scale), and electrocardiogram (ECG) at 10:00, 13:15, and 16:15, and task performance (logical reasoning and digit span) at 10: 00, 11:30, 13:15, 14:45...

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“…The first section includes 60 questions based on sleep habits and other lifestyle issues. The second section is a MorningnessEveningness (ME) questionnaire created by Horne and Ostberg [18] and translated into Japanese by Ishihara [19]. It comprises 19 items.…”

Section: Questionnairesmentioning

confidence: 99%