What is the strength of ex post facto?
What is the strength of ex post facto?
The strengths of the ex-post facto research are: It is considered as a very relevant method in those behavioural researches where the variables can not be manipulated or altered. The examples of such researches can include many sociological (e.g. delinquency) as well as educational variables ( e.g. achievements).
Why are ex post facto studies weak?
It has a number of weaknesses or shortcomings as well. From the point of view of its internal validity, the two main weak points are the lack of control of the independent variables and the nonrandom selection of participants or subjects.
What is ex post facto research design and example?
The assignment of subjects to different groups is based on whichever variable is of interest to the researchers. For example, a researcher is interested in how weight influences self-esteem levels in adults. This is an ex post facto design because a pre-existing characteristic (weight) was used to form the groups.
What is the goal of ex post facto design?
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. A quasi-experimental study simply means participants are not randomly assigned.
What are the strengths and weaknesses of a field experiment?
Field experiments
| Strengths: | Weaknesses: |
|---|---|
| People may behave more naturally than in laboratory – higher realism. | Often only weak control of extraneous variables – difficult to replicate. |
| Easier to generalise from results. | Can be time-consuming and costly. |
What are the advantages and disadvantages of longitudinal research?
What are the pros and cons of a longitudinal study? Longitudinal studies are better to establish the correct sequence of events, identify changes over time, and provide insight into cause-and-effect relationships, but they also tend to be more expensive and time-consuming than other types of studies.
What is the goal of a quasi experimental research design?
Quasi experiments are studies that aim to evaluate interventions but that do not use randomization. Like randomized trials, quasi experiments aim to demonstrate causality between an intervention and an outcome.
What is the goal of quasi experimental design?
Quasi-experiments are studies that aim to evaluate interventions but that do not use randomization. Similar to randomized trials, quasi-experiments aim to demonstrate causality between an intervention and an outcome.
How do you identify strengths and weaknesses in a research study?
Key Takeaways
- Strengths of survey research include its cost effectiveness, generalizability, reliability, and versatility.
- Weaknesses of survey research include inflexibility and lack of potential depth.