Experimental and Non-experimental Methods_09-1.16.11

Experimental and Non-experimental Methods_09-1.16.11 -...

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Experimental and Non- experimental Methods PSY 250
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Types of Research __________________________ Characteristics of a population __________________________ Observing what relations occur naturally between variables No comparison of a manipulation or treatment with a control __________________________ Compare manipulation/treatment condition with a control condition
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Types of Research What type of research are the following? A researcher assesses the relation between weight and onset of puberty in girls A political opinion poll assessing attitudes towards different candidates The effect of alcohol or placebo on aggressive behavior
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Independent & Dependent Variables _____________ Independent variable = “predictor variable” Dependent variable = “outcome variable” No manipulation but researcher _____________ Independent variable = the
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Unformatted text preview: variable being manipulated by the experimenter ◦ Dependent variable = the variable thought to be influenced by the A bit of practice The effect of age on cognitive ability Use of text-messaging while driving and number of MVAs Amount of education and annual income Correlational Research _____________________ ◦ X Y ◦ Y X ◦ Bidirectionality Both X Y and Y X Correlational Research ________________________ ◦ Third variable that accounts for the relation between X and Y ◦ Li (1975) showed that number of electrical appliances owned was strongest predictor of contraceptive use in Taiwan Correlational Research _____________________________ We can only say that a score on X influences the probability of a particular score on Y Media advertisements manipulate correlation to imply causation...
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This note was uploaded on 11/20/2011 for the course PSY 250 taught by Professor Quinton,wj during the Fall '08 term at SUNY Buffalo.

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Experimental and Non-experimental Methods_09-1.16.11 -...

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