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psych U1M6

correlation and experimentation

Scatter plot Graphed cluster of dots which represents the values of two variables. The slope of the points=relationship between the two variables. Amount of scatter shows strength of correlation.
correlation a measure of 2 variables changing together
define "correlation is not causation" just because there is a correlation between 2 variables does not mean that one causes the other
positive correlation When the two variables rise together (not necessarily up)
negative correlation When the two variables move away from each other.
illusory correlation The perception of a relationship where none exists.
correlation coefficient The relationship between two variables from -1 to +1
variable Conditions, events, or behaviors to measure multiple values.
operationalize Explain how you will measure a variable
confounding variables A factor other than the independent variable that might produce an effect in an experiment
subject relevant Subjects in the two groups shouldn't differ in any way (limited by random assignment)
ex of subject relevant putting 5 ppl in the experimental and control group who have the same strength and stanima
group matching Ensures that the experimental and control groups are equivalent on certain criteria
situation relevant External/environmental conditions must be equivalent except for differences produced by the independent variable.
ex of situational relevant if you want to see if music affects how people work, there should be no distractions, such as cars honking, etc
experimenter bias Tendency of researches to treat members of experimental and control group differently to increase chance of confirming hypothesis.
observer bias The tendency to see what we expect to see or what we want to see.
hawthorne effect Changes in behavior resulting from attention participants believe they are getting from researches and not the variables manipulated by the researches.
placebo method a treatment that has no true effect
placebo effect Feeling better because we expect to feel better from imagined treatment.
single-blind design Researchers don't tell the participants if they are given a test or control treatment.
double-blind design Both the participants and researchers are blind to whether the participants have received a treatment or a placebo.
counter balancing No subject relevant confounding variable; using experimental subjects as their own control group.
Created by: allyson.lee
Popular Psychology sets




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