This study examined age-group corresponding relationships of the controlled force exertion based on sinusoidal and quasi-random waveforms in 175 right-handed male adults aged 20 to 86 years. The subjects were divided into 3 groups based on age-level: 53 young (mean age 24.6, SD = 3.3 years), 71 middle aged (mean age 44.3, SD = 8.7 years), and 51…

This review assembles pedometry literature focused on youth, with particular attention to expected values for habitual, school day, physical education class, recess, lunch break, out-of-school, weekend, and vacation activity. From 31 studies published since 1999, we constructed a youth habitual activity step-curve that indicates: (a) from ages 6…

Examined effects of the age of adult female strangers on the affective behavior of 60 Japanese toddlers. The first study investigated the importance of the age discrepancy between mothers and female strangers aged 23 and over 65. The second study compared toddlers' reactions to mothers, men and women strangers the mother's age, and men and women…

The rise of the service sector is a major trend common to all western, industrialized countries. Employment in the service sector has increased in 1960-1986 in all 10 countries participating in the Organisation for Economic Cooperation and Development's Centre for Educational Research and Innovation Human Resources project (Japan, Belgium, France,…

This book proposes a new, multidisciplinary theory for explaining and predicting current and future patterns of women's choice between employment and family work. Chapters 1 and 2 present main tenets of preference theory and explain the need for the theory. Chapters 3 through 8 elaborate four principal tenets of preference theory. Chapter 3…