Distinguishing Correlational and Experimental Research
When assessing the strength of evidence from studies on the effects of diet on cognitive function, which of the following is the most critical distinction between correlational and experimental research?
A
Sample size diversity in terms of demographics like age and gender.
B
Control over extraneous variables influencing cognition aside from diet.
C
Data collection methods such as surveys or standardized tests.
D
Length duration from dietary changes to testing cognitive function.
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