Model	Uses
	One set of data, placement of an additional score in question
	One set of data, likelihood of being part of a hypothetical population in question
	Two groups, one measure, population variances assumed equal Exp Pre vs. Con I Pre, Exp Post vs. Con I Post, Exp Post vs. Con II Post Con I Post vs. Con II Post
	Two groups, one measure, population variances assumed not equal Exp Pre vs. Con I Pre, Exp Post vs. Con I Post, Exp Post vs. Con II Post Con I Post vs. Con II Post
	Three or more groups, one measure, population variances assumed equal Exp Post vs. Con I Post vs. Con II Post

Model	Uses
	One group, two measures, whose differences are meaningful Exp Pre vs. Exp Post, Con I Pre vs. Con I Post
	One group, two measures, with a perceived relationship Exp Pre vs. Exp Post, Con I Pre vs. Con I Post

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