A research group interested in comparing the effect of different types of music on short-term memory gathers 200 volunteers for a study. One group will listen to a hip hop music playlist while trying to memorize a list of 20 words. A second group will listen to a playlist of orchestral music while trying to memorize the list of 20 words. After a break, the number of words recalled correctly by each individual is measured and the results for the two groups are compared. 6) Is this an experimental study or an observational study? a) Experimental study b) Observational study 7) Explain your reasoning. 8) Which group do you hypothesize will recall more words? 9) Explain your reasoning.
A research group interested in comparing the effect of different types of music on short-term memory gathers 200 volunteers for a study. One group will listen to a hip hop music playlist while trying to memorize a list of 20 words. A second group will listen to a playlist of orchestral music while trying to memorize the list of 20 words. After a break, the number of words recalled correctly by each individual is measured and the results for the two groups are compared.
6) Is this an experimental study or an observational study?
Experimental study
Observational study
7) Explain your reasoning.
8) Which group do you hypothesize will recall more words?
9) Explain your reasoning.
10) Here are some options for splitting the volunteers into groups. Which method will best address the intention of the study?
Divide groups based on their preferred music style.
Divide groups based on their age. The youngest 100 listen to hip hop music, and the older 100 listen to
orchestral music.
Divide groups based on the order in which they come in to do the study. The first 100 listen to hip hop
music, and the next 100 listen to orchestral music.
Write all the volunteer names on slips of paper, put them in a jar and shake it, then draw out 100 slips.
These will listen to the hip hop playlist while the others listen to orchestral music.
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