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psych U1M6
correlation and experimentation
| Question | Answer |
|---|---|
| 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
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