An experiment is a controlled test of a hypothesis in which the researcher manipulates one variable to discover its effect on another.
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Q199: Observational studies are more useful for describing
Q200: Psychologists measure alternate-forms reliability by giving different
Q201: The variable that an experimenter manipulates is
Q202: Ideally, everything in an experiment except the
Q203: When two variables are correlated, one variable
Q205: A laboratory observation is a controlled test
Q206: An association between decreases in one variable
Q207: When a correlation coefficient indicates a strong
Q208: The value of the independent variable depends
Q209: If a placebo produces the same results
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