A product manufacturer has developed a headband that they claim stimulates people's brains and improves their memories while they are wearing it. To test the effectiveness of this product, the researchers should probably use a/an [ Select ] and should compare the results of a memory test conducted while participants are wearing the headband to [ Select ] .
Added by Christopher A.
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This type of study design involves randomly assigning participants to either the group that wears the headband or a control group that does not wear the headband. Show more…
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