PS101 Lecture Notes - Lecture 2: Null Hypothesis, Sampling Bias, Social Desirability Bias
Document Summary
Chapter 2 + app b: research/statistics in psychology. Theory: system of interrelated ideas to explain set of observations. Hypothesis: statement of relationship between two variables (anything health. Specific measureable that is controlled/observed in the study) Operational definition of a pet is not a fish, or rabbit but a cat and/or dog, adopted from a shelter. By creating specific definitions of measurement we avoid ambiguity, it allows replication (which is the most important step in research) If research isn"t replication, it is unknown if the information is real: eg. One study came out in 1980s, brains of gay men are smaller than straight men. Adopting a dog/cat from a shelter will decrease blood pressure - hypothesis. Control other things: all else is equal control group, random assignment. If all else is equal, then our manipulation caused outcome. Independent variable (iv): what the experimenter varies/manipulates to see its. Dependent variable (dv): what is impact measured, thought to be impacted by the iv.
