PSY 100 Lecture Notes - Lecture 5: Blind Experiment, Central Nervous System, Dependent And Independent Variables
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Population, every single person you"re interested in studying or generalizing results. Sample, the people that actually participated in study. (who you hope is representative of your population. ) Every person in the population has an equal chance of being selected. To whom do you want to generalize the results. Importance of representative sample (avoid sampling bias) Before accepting the credibility of research, think carefully about the sample. Statistical measure of how closely the two are related. Change in one variable predicts change in another variable. Positive correlation direct relationship, they are moving together. Negative correlation inverse relationship, they are moving apart. Measuring the strength of correlational relationship: r=+/- *number between 0-1* Direction = can be + (positive -) or (negative correlation) The closer to one, the more related they are. Correlation does not equal causation, there might be a third thing, that causes both.
