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Can different types of music lead to different physiological responses?

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I gave 20 people 2 R&B songs, 20 people 2 Rap or pop songs, and 20 people no songs. They were to listen to both the 2 songs per day for the week, then I would call them and ask how it affected their responses

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After 1 week, I called up each individual in my study and had them tell me their experiences and responses with each song and type they played. For the control group, no songs. Nothing had changed because they didn’t listen to music. For the R&B group, the average went from not a lot of any response to a more sad kinda slower response. So a slight decrease in response. For the pop and rap group, they went from a normal feeling with very little response to having more of a hyper response and better feeling. This is a very positive increase in response. I think that this is statistically significant and that the R&B music helps people have more of a sad reaction overall, more than would occur by random chance. With my 13.5% margin of error though, I cannot be certain if my results are accurate I need to start a Replication.

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100 adults that quite frequently listen to music.

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My sample size of 60 yields a margin of error at
13.5%. This could be much lower, but it would require me to spend a lot more time to
get more than 60 subjects.

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I put a survey on my Snapchat story and asked people to
complete the survey. I asked them how often they listen to music and what their response is to the certain music they listen too. I had about 60 people reply saying they wanted to be part of the experiment so I used them.

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My explanatory variable is which type of song each person
Listens to over the time period.

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Crossover design could be used in this study. I would have all
the subjects do all the types of songs every day for a week and see how their Responses vary from each type of song. However, this would be too time consuming as I would be afraid that no one would want to be part of my experiment because of how much time it takes daily.

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My response variable will be the rating of response they get after
the week of listening to the 2 songs.

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I plan on carrying out this experiment again next winter on a new group of 60 people. If my results are close to the same, I will know they are more valid as I’ve done the first time.

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I do not have a placebo as that is not possible, I do have a control group, which is the 20 people that are not to listen to any songs during the whole week.

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Their is no blinding in this study everyone knows what type of songs they are going to get while unaware of the outcome.

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I could have done matched pair designs by pairing people
according to their taste in music. I didn’t do this however,
because I assigned groups on the spot on Snapchat through the survey and didn’t get the opportunity to match pairs up.

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I made 2 separate groups of 20 people so that the results would be random