The accuracy of the results of research data is partially dependant on the sample that was used in the research study. How large the sample, its specific characteristics, and how it was selected, all play a significant role in how “good” the research results will be. Without appropriate sample size, characteristics, and selection, the results will be less than optimal. To this point, forensic psychology professionals often use existing databases from which to draw the data for their research; that is, they obtain their sample from these data bases. The problem with doing this is that the researcher does not have input into the sample represented in the data, such as how and from whom it was collected.
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