a one way BETWEEN GROUPS ANOVA is when there are 2 or more groups of cases
and you are interested in comparing/contrasting the groups. An example might
be people who are given Drug1, Drug2, and Drugs3.
Another example might be people who are (1) right-handed, (2) left-handed,
or (3)ambidextrous.
A one way WITHIN GROUPS ANOVA aka REPEATED MEASURES ANOVA is when there or 2
or more times or conditions when a single group of cases and you are
interested in comparing/contrasting teh times or conditions. For example,
the times might be when weight is measured (1)before treatment, (2)
immediately after treatment, (3) 6 months later, and (4) a year later. An
example of conditions, might be when the same people's behavior is observed
when shown photos with different facial expressions.
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Art Kendall
Social Research Consultants
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Art Kendall
Social Research Consultants