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Psychology Chapter 2

TermDefinition
Self-fulfilling prophecy A situation in which a researcher's expectations influence that person's own behavior, and thereby influence the participant's behavior
Single-bind experiment An experiment in which the participants are unaware of which participants received the treatment
Double-blind experiment An experiment in which neither the experimenter nor the participants know which participants received which treatment
Placebo effect A change in a participant's illness or behavior that results from a belief that the treatment will have an effect, rather than the actual treatment
Statistics The branch of mathematics concerned with summarizing and making meaningful inferences from collections of data
Descriptive statistics The listings and summarizing of data in a practical, efficient way
frequency distribution an arrangement of data that indicates how often a particular score or observation occurs
Normal curve A graph of frequency distribution shaped like a symmetrical, bell-shaped curve; a graph of normal distribution
Central tendency a number that describes something about the "average" score of a distribution
Variance A measure of difference, or spread
Standard deviation A measure of variability that describes an average distance of every score from the mean
Correlation coefficient Describes the direction and strength of the relationship between two sets of variables
Inferential statistics numerical methods used to determine whether research data support a hypothesis or whether the results were due to chance
Created by: 218342778604639
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