- Age differences in sleep-wake behavior under natural conditions
- Personality and Individual Differences
- Volume | Issue number
- 27 | 5
- Pages (from-to)
- Document type
- Faculty of Social and Behavioural Sciences (FMG)
- Psychology Research Institute (PsyRes)
Differences in lifestyle may account for a considerable portion of the reported age-related changes in overt circadian rhythmicity. By instructing a group of healthy, noninstitutionalized, elderly males (aged 59-74 yrs) and a group of young male adults (aged 18-26 yrs) to keep a sleep-wake log for a period of 2 wks, and to wear an activity monitor for an overlapping period of 11 days, the authors attempted to assess age-related differences in the habitual sleep-wake behavior, in particular its day-to-day variability. Four clusters of coherent variables were constructed, reflecting (1) circadian phase, (2) variability of sleep-wake behavior, (3) sleep-wake continuity and (4) subjective sleep-wake quality. The results show that, in comparison with the young Ss, the elderly had a relatively advanced and more regular sleep-wake pattern, reported more midnight awakening, and did not differ in their subjective sleep evaluation. In spite of a greater regularity in their lifestyle (which would favor a larger amplitude of the overt circadian rhythmicity), oral temperature measurements showed some evidence of a weakened 24 hr periodicity in the elderly.
- go to publisher's site
If you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library, or send a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible.