PSY 250 Lecture Notes - Lecture 43: Standard Deviation, Test Statistic, Random Assignment
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Different individuals are exposed to the different levels of your iv. Each individual in the study is exposed to all levels of the iv. Used to compare the means of two groups. When groups are created through random assignment or class variables. Comparing sample mean to a known (or logical) population mean. Instead of doing a treatment and control only do treatment and compare against a chance value of 50% Each participant experiences only one level of an independent variable. Predict a difference between men and women on subliminal ads. Subtract the mean of group 1 from the mean of group 2 and divide by n. Take difference scores and subtract the mean difference. Predict a difference in subliminal memory based on emotional content. Average of the squared difference of scores from the mean (score - mean)2 for participant 1, 2, 100 divided by the number of participants minus 1 (n-1)
