PSY-B - Psychology PSY-B 311 Lecture Notes - Lecture 6: Effect Size, Statistical Significance, Statistical Inference
27 Sep 2016
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Used to describe the relationship between two or more naturally occurring variables. Do the variables covary (vary together)? e. g. , when score on one variable is high the score on the other variable is high too. British much influenced by darwin"s theory of evolution (was darwin"s cousin) interested in the idea that mental abilities are inherited. -> book: english men of science: their nature and nurture 1874. Popularized use of phrase nature and nurture developed comprehensive intelligence testing: anthropomorphic laboratory measured mostly physiological attributes assumed to be related to intelligence (e. g. , sensory acuity, reaction times) did this at a state fair . Decided to use graphs to show relationships between traits. First to graph correlational data using scatter plots. First to use term regression in this context. For each participant, plot a point that represents his or her combination of scores on the two variables. Result: scatter plot (see text for other example scatterplots of)
