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Model ex post facto (EPF) (łac. ex post (facto) - po (fakcie)) – w metodologii badań psychologicznych jest to model badawczy stosowany do wyjaśnienia przyczyn zjawisk, które miały miejsce w przeszłości.
W modelu ex post facto badacz analizuje wpływ pewnego czynnika, który różnicuje badane grupy na daną zmienną pomiarową, zmienną zależną. Przykład: Badacz chciał sprawdzić, czy osoby z wykształceniem wyższym różnią się od osób z wykształceniem średnim pod względem satysfakcji z życia.
An ex post facto law is a law that makes an action illegal after it has already been done. This means that if someone did something that was legal at the time, they cannot be punished for it later if a new law makes it illegal.
An ex post facto law [1] is a law that retroactively changes the legal consequences (or status) of actions that were committed, or relationships that existed, before the enactment of the law.
Although constitutional and statutory ex post facto protection had been in existence since at least 1871, the Third Reich suspended the prohibitions, as notably evidenced by a 1933 statute that retroactively imposed the death penalty for those supposedly involved in the infamous Reichstag fire.
The Ex Post Facto Clause, by its own terms, does not apply to courts. Extending the Clause to courts through the rubric of due process thus would circumvent the clear constitutional text.
Florida, 432 U.S. 282 (1977), the Court held that a retroactive change in state law did not violate the Ex Post Facto Clause. In Dobbert, at the time of the crime (capital murder), state law forbade the imposition of the death penalty if a majority of the jury recommended mercy.
