Many of the men developed symptoms that wed recognize

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Many of the men developed symptoms that we’d recognize as symptoms of an eating disorder Being deprived of food for a very long time activated cycle of binge and purge Brain thinks food is rare and uncertain – it makes you eat a lot whenever you encounter food o All or nothing thinking is common target in many forms of therapy Eating preferences and types of things that you like to eat are heritable to some extent o Heritability of behaviors is not explained by just one or a few genes but contribution of many of genes o Genes are more or less randomly distributed across all the chromosomes o Most of the genes found related to eating preferences their biological function is unknown One study looked at macronutrients by having people report what they ate on a questionnaire o Constructed macronutrients based on all the self-reports from people o They computed total calories and determined how much of it was carb, protein, sugar, and fat o Genetic architecture of liking protein is similar to genetic architecture of being obese To study sources of obesity, you need to differentiate btwn things correlated w/ obesity & things that cause obesity o Simple way is a tight-controlled randomized trial – can’t lock people in a lab and force them to follow a diet o You can use insights from genetic association studies to get a causal effect Results from animal studies hardly every carry over to humans one-to-one o Way it’s studied in animals is different than in humans – often use 1 strain of mice w/ same genotype Results may or may not carry over to other types of mice or to humans In genetic association studies, you want to control for population stratification o Want to look at populations that are not too diverse since it can produce confounding variables o Rich countries of North Europe & North America have the money to collect genetic data Psychology of Alcohol Most people in PSY 301 say they never or almost never get drunk o Most people in PSY 301 think their peers get drunk about 2-3 times a month Discrepancy btwn our behavior and perceived normative behavior of others is a risk factor for increased drinking
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Blackout – period of time when you’ve lost your memory after drinking a lot o We used to think of blackouts as severe symptoms of alcoholism o Blackouts happen much more frequently to casual drinks than earlier anticipated Alcohol impairs glutamate transmission in your hippocampus which is important for memory formation
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