Recall Bias and Quality of Research

Quality research design is essential in public health, health promotion efforts, and epidemiological studies. Lack thereof threatens the internal and external validity of a study. The internal validity of a study is the assurance of equitable representation of subjects within the cohorts groups, the control, and experimental groups (Gordis, 2009). It assures that distribution of the variables or determinant factors for the research is equally distributed within the study. On the other hand, the external validity assures that the sample size selected for a study represents the genetic variability and the socio-economic diversity, etc. of the target population through appropriate selection and randomization of research subjects within the study groups (Gordis, 2009). Perhaps, the appropriateness of epidemiological studies is not limited to a quality research design. The process is a continuous model that accounts for multifactorial variables that can falsely deviate the accuracy of the research questions toward or away

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