BACKGROUND There has been considerable interest in Japanese society in the problem of work-related stress leading to depressive symptoms, and an increasing number of primary houseworkers maintain paid employment. The purpose of this study was to examine the differential impact of multiple roles associated with psychological distress among Japanese workers. METHODS We studied 722 men and women...

It was recently hypothesized that depression might function, in part, as a bargaining strategy when cooperation imposes a net cost, but there are social constraints on defection [Evol. Hum. Behav. 20 (1999) 325.]. If so, such social constraints should be associated with depression, and depression in one partner should be associated with increased investment by other partners. Several prediction...

Educational games may improve learning by taking advantage of the new knowledge and skills of today’s students obtained from extensive use of interactive games. This paper describes how interactive dynamic simulators of advanced technical systems and phenomena can be shaped and adapted as games and competitions supporting technical education and training. Some selected examples at different edu...

The use of corporal punishment to discipline children remains one of the last holdouts of old-fashioned childrearing in the United States. Gone are the days of administering cod-liver oil to prevent rickets, spreading alcohol on babies’ gums to dull teething pain, or even putting children to sleep on their stomachs to prevent choking on fluids—practices that have been repeated by generations of...