An exciting period in mental and physical health research is beginning, resulting from a paradigm shift from an outdated biomedical reductionism approach to a more comprehensive biopsychosocial model, which emphasizes the unique interactions among biological, psychological, and social factors required to better understand health and illness. This…

Reports on a laboratory experiment where students measured their heart rate, blood pressure, mood, alertness, and cognitive performance. Measures showed significant circadian heart rhythm variations. They were strongly correlated and peaked at different times. Discusses the implications of this and students' reactions to the experiment. (MJP)