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Gravity
Terms in this set (13)
Hindsight bias
the tendency to believe, after learning an outcome, that one would have foreseen it
Correlation
Measure of extent to which two factors vary together and thus of how well either factor predict the other
Illusory correlation
Perceiving a relationship where none exists, or perceiving a stronger-than-actual relationship
Regression toward the mean
The tendency for extreme or unusual scores or events to fall back toward the average
Independent variable
In experiment, the factor that is manipulated; the variable whose effect is being studied
Negative correlation
Two variables are inversely related—Vice versa for positive
Double blind procedure
an experimental procedure in which both the research participants and the research staff are ignorant (blind) about whether the research participants have received the treatment or a placebo. Commonly used in drug-evaluation studies.
Confounding variable
Factor other than the factor being studied that might influence a study's results
Dependent varaible
Outcome that is measured; the variable that may change when the independent variable is manipulated
Inferential statistics
Numerical data that allow one to generalize—to infer form sample data the probability of something being true of a population
Standard deviation
Better gauges whether scores are packed together or dispersed
Normal curve
Symmetrical ball-shaped curve that describes the distribution of many types of data, most scores fall near the mean and fewer near the extremes
Statistical significance
Observed difference is probably not due to chance variation between the samples
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