PSY100H1 Chapter Notes - Chapter 14: Negative Affectivity, Adrenal Medulla, Learned Helplessness
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PSY100H1 Full Course Notes
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Health psychologist interested in positive and negative effects that humans behaviours and decisions have on their health, survival, and well being. Efforts to prevent smoking include banning smoking in public areas, steep taxes applied to tobacco, written and visual warnings. Body mass index (bmi): used to estimate a healthy body weight given an individual"s height. Bmi is calculated by dividing the person"s weight (kg) by the square of the person"s height (m) (18. 5-24. 9) healthy (below would be under weight, and up to 29. 9 would be overweight; above 30 is obese) *obesity has many detrimental health consequences such as cancer, diabetes, cardiovascular disease, shorter life etc. Genes account for between 50-90% of the variation in body weight. Genetic factors influence body type, metabolism and other physiological process that contribute to body weight and size. Set point theory: hypothesized mechanism that serves to maintain body weight around a physiologically programmed level.
