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15 Cards in this Set

  • Front
  • Back
control group
the condition of an experiment that contrasts with the experimental condition and serves as a comparison for evaluating the effect of the treatment
correlation coefficient
statistical measure of a relationship; reveals how closely they vary
hindsight bias
the tendency to believe, after learning an outcome, that one would have foreseen it.
descriptive statistics
used to describe the basic features of the data in a study
inferential statistics
provide ways of testing the reliability of the findings of a study and "inferring" characteristics from a small group of participants or people (your sample) onto much larger groups of people (the population)
A measure of central tendency which is more commonly known as an "average"
A measure of central tendency that is defined as the midpoint in an array of numbers
A measure of central tendency which is defined by the most common number in an array
independant variable
the experimental factor that is manipulated; the variable whose effect is being studied
dependent variable
the outcome factor; the variable that may change in response to manupilations of the independent variable
the difference between the highest and lowest scores in a distribution
standard deviation
a computed measure of how much scores vary around the mean score
operational deviation
a statement of the procedures (operations) used to define research variables
scatter plot
a graph cluster of dots, each of which represents the values of 2 variables. The slope of the points suggests the direction of the relationship between the 2 variables. The amount of scatter suggests the strength of the correlation.
a testable prediction, often implied by a theory