Lecture 2 10.05.09

Lecture 2 10.05.09 - 10/05/09 Psychology 100B Lecture 2...

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10/05/09 Psychology 100B – Lecture 2 Film: o Discussion of methodology o Two examples of experiments Experimental method Independent variable which we manipulate Dependent variable which we look for changes in as a result of the manipulation of the IV while at the same time we control for outside influences that might affect the result. (extraneous variables) We can control the extraneous variable effects by: o Keep values constant – stood the same distance from posters, neutral words were the same length and had the same number of syllabi as the incongruent words. o Randomise effects – randomization to assign subjects to first condition. o Counterbalance – the order in which the subjects participated in the two conditions We want to be able to infer at the end of the experiment that the results are caused by the manipulation of the IV only . Film What are the hypotheses? How are the IV being manipulated? How are the IV being operationally defined? How are the DV being operationally defined? What control procedures are being used for extraneous variables? Hypothesis
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Lecture 2 10.05.09 - 10/05/09 Psychology 100B Lecture 2...

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