PSYCH 350 1st Edition Lecture 4Outline of Last Lecture I. Research methodsII. Correlational researchOutline of Current Lecture III. Positive IV. NegativeV. Experimental researchVI. Validity Current Lecture-Correlational Research oPositive correlation-The values of two variables change in the same direction-Positive does not equal good-General trend=slope up and to the rightoNegative correlation -The values of two variables change in the opposite direction-Negative does not mean bad-General trend= slope down and to the right-Experimental researchoResearch that can demonstrate cause and effect relationships by manipulating one or more factors while controlling othersoIndependent variable (IV)-The variable that is manipulatedoDependent variable (DV)-The variable that is measured oExamples:-Does room temp affect performance on a group task?-Will a person help another person when many other people are nearby?-Do people yell louder when they're in a large group or alone?oRandom assignment-Assigning participants to expt'l conditions so that each participant has an equal change of being in any condition-Control group-The group of participants that does not receive the experimental manipulation-All other factors are held constant These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.-Validity oInternal validity -Making sure that nothing besides the IV can affect the DV-Requires tight controls oExternal validity -The extent to which research results can be generalized beyond the current situation and people -Requires real-world
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