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21 lis 2023 · Ex post facto design is a quasi-experimental study examining how an independent variable, present prior to the study in the participants, affects a dependent variable.
Examples. To illustrate the concept, let’s consider some examples. Example 1: Smoking and Lung Cancer. A researcher wants to investigate the relationship between smoking and lung cancer. It would be unethical to conduct an experiment where participants are asked to smoke.
Ex post facto study or after-the-fact research is a category of research design in which the investigation starts after the fact has occurred without interference from the researcher.
The ex post facto design is a type of research design used in social sciences where the researcher observes and analyzes the effects of an independent variable that has already occurred or been manipulated, without being able to control or manipulate the independent variable themselves.
1 cze 1997 · One of the most commonly seen forms of nonexperimental research designs is the ex post facto (after the fact) study using correlations to suggest causality. Much of the research that in- volves personal lifestyle choices and the negative impact of these must be by their nature ex post facto.
These two examples reflect two types of approach to causal-comparative research: the ‘cause-to-effect’ kind and the ‘effect-tocause’ kind. The basic design of causal-comparative investigations is similar to an experimentally designed study.
The term ex post facto is from Latin and literally means “from after the action.” This design, when employed experimentally, functions as a comparison between groups without the use of a pretest. The design type is employed both by classic experimental research as well as field research.
