I'm writing a critical appraisal for one of my assignments and I'm so confused (in terms of terminology) as to what this type of research design is called.
The authors have identified participants who are already enrolled in two different types of intervention. Thus there are two separate groups. The authors have assessed the participants for various characteristics at T1 and T2 (2 years later) and reported their findings on group differences.
This is definitely not a true experiment. But is it a quasi-experiment? Or a different type of non-experimental design? Correlation?
It is a non-randomized study study. Depending on how the original treatment was assigned/controlled it could be one of many (https://childhoodcancer.cochrane.org/non-randomised-controlled-study-nrs-designs).
This often happens in qualitative research designs like ethnographic or case studies whereby the targeted sample is selected on a non-probability basis and there is no IV because based on the researcher's observations, the data are analyzed and interpreted before a generalization is found out.
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