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Definition of Post hoc

Babylon English

of or relating to the fallacy of arguing that because one thing happens after another the first event was a cause of the second event, being the fallacy of arguing that because one thing happens after another the first event was a cause of the second event; developed after the fact
logical fallacy that simply because one thing happens after another the first event was a cause of the second event
Post hoc Definition from Arts & Humanities Dictionaries & Glossaries
JM Latin-English Dictionary
After this
Post hoc Definition from Science & Technology Dictionaries & Glossaries
Electronic Statistics Textbook
Usually, after obtaining a statistically significant F test from the ANOVA , one wants to know which means contributed to the effect; that is, which groups are particularly different from each other. One could of course perform a series of simple t-tests to compare all possible pairs of means. However, such a procedure would capitalize on chance. The reported probability levels would actually overestimate the statistical significance of mean differences. For example, suppose you took 20 samples of 10 random numbers each, and computed 20 means. Then, take the group (sample) with the highest mean and compare it with that of the lowest mean. The t-test for independent samples will test whether or not those two means are significantly different from each other, provided that they were the only two samples taken. Post-hoc comparison techniques on the other hand, specifically take into account the fact that more than two samples were taken. They are used as either hypothesis testing or exploratory methods.
For more information, see the ANOVA chapter.
Post hoc Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
Post hoc (sometimes written as post-hoc) is a Latin phrase, meaning "after this" or "after the event". It may refer to:
  • Formulated after the fact (e.g., a post hoc rationalization, a post hoc justification, a post hoc explanation, post hoc reasoning)
    • Post hoc analysis (or post hoc test), a form of statistical analysis
    • Post hoc theorizing, generating hypotheses based on data already observed

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Post hoc Definition from Medicine Dictionaries & Glossaries
Aids Glossary
after the fact.
Aegis
Post hoc Definition from Language, Idioms & Slang Dictionaries & Glossaries
WordNet 2.0

Noun
1. the logical fallacy of believing that temporal succession implies a causal relation
(synonym) post hoc ergo propter hoc
(hypernym) logical fallacy