Identifies , define and describe what type of variables are the most common independent and dependent variables typically used to measure your topic phenomenon of interest .
) Identifies, define and describe what type of variables compose “extraneous variables” that can affect your topic phenomenon of interest .
3)Discuss how those independent, dependent ,and extraneous variables affect your topic phenomenon of interest ( for example ,what affects opioids abuse directly and indirectly ? what can influence hemoglobin AC1 in patients with diabetes , both directly and indirectly ?)