PSY 2012 Lecture 4: PSY 2012 Chapter 1 Research Methods
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Example hypothesis: people get better looking at closing time. Dv: perceptions of physical attractiveness: operational de nition: rate attractiveness of target pictures on a 1 to 10 scale. Iv: amount of alcohol: control: give ratings only, placebo: drink a sugary drink with no alcohol. Experimental: drink a sugary drink mixed with either 3 or 5 ounces of alcohol. Summarize data through standard deviations: make reliable inferences representative vs biased represents the population not convenience less variable vs more variable people have more things in common, more subjects vs less subjects larger the sample the better.
