Referring to statistical tests conducted after an initial analysis (like ANOVA) to determine which specific groups differ from each other. These tests are performed only when the overall test indicates significant differences exist.
From Latin 'post hoc' meaning 'after this,' used in the fuller phrase 'post hoc ergo propter hoc' (after this, therefore because of this). In statistics, adopted to describe analyses conducted after finding an overall significant effect.
Post-hoc tests are like detective work after finding evidence of a crime - once ANOVA tells you 'something's different somewhere,' post-hoc tests hunt down exactly which groups are the culprits, but they use special correction methods to avoid false accusations!
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