PSYCH261 Chapter 4: Biological Psychology 10th Edition Chapter 4

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Positive: rep"d as 0 to +1. 00; negative rep"d as 0 to -1. 00. Eg. people w/ meds have less # of headaches per day than non medicated. Eg. allowing both bulimic and non-bulemic(control) groups binge eat. I and e validity usu. inversely related (if control too much, hard to generalize) Behavioural scientists explore human behaviour via scientific method. Tough: complexity of human nature, how to get in people"s minds, link b/w bio and psych dimensions. 2 aspects of abnormal behaviour: nature of the problems reported & etiology (causes) a. b. Start w/ hypothesis; make research design to test it (including i. v. and d. v. ) Measure validity; internal (does i. v. cause d. v. to change?) and external: relatable to general world. Hypothesis: educated guess; must make it testable; testability: ability to support hypothesis. Confound: any factor occurring in a study that makes the results uninterpretable. To insure internal validity: use control groups and randomization.