https://padlet.com/bloosmore1/3jh0t6y73fxgfgon Does drinking coffee make you feel more alert? en-us 2021-03-28 14:06:55 UTC 2026-02-05 15:52:08 UTC hello@padlet.com bloosmore1 https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361372078 For my project I was interested in learning about whether drinking coffee or water makes people more alert.]]> 2021-03-28 14:08:42 UTC https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361372078 bloosmore1 https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361375047 People have been drinking coffee for years and years. Why? It tastes great, but does it keep you awake? Amazingly, no one has ever studied this before. ]]> 2021-03-28 14:10:42 UTC https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361375047 bloosmore1 https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361379591 20 faculty chose to participate in my experiment (but I didn't tell them exactly what it was about) and half were randomly chosen to get regular coffee and the other half drank decaf.  This was a double blind study.

At the end of the week, each participant self reported their energy level. Data was analyzed using a two-sample t-test to evaluate the null hypothesis that there is no difference between the groups.]]> 2021-03-28 14:13:25 UTC https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361379591 bloosmore1 https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361387501 Here is a boxplot of the two different groups. Oh look, actually there are three groups because I decided to add a control group (no coffee!) as well.]]> 2021-03-28 14:19:08 UTC https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361387501 bloosmore1 https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361390424 Since I decided to look at three groups, I used ANOVA to evaluate the null hypothesis of no difference between the means.  Here is my ANOVA output.  ]]> 2021-03-28 14:21:07 UTC https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361390424 bloosmore1 https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361394724 The following is a summary table of my results for the three groups.

(add a table here?)]]> 2021-03-28 14:24:09 UTC https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361394724 bloosmore1 https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361404571 My results probably aren't that much of a surprise.  Coffee works!   Maybe it is a little surprising that there was such a difference between decaf and regular coffee.  I would have expected the placebo effect to be more pronounced.

One challenge is that these results are based on how subjects felt. A better experiment might find an objective measure of chemistry or response time?]]> 2021-03-28 14:30:29 UTC https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361404571 bloosmore1 https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361441443 In this experiment I showed that regular coffee really does make people feel more awake! ]]> 2021-03-28 14:54:26 UTC https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361441443 bloosmore1 https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361442612 The p-value is 0.002, suggesting that at least one of the means is different.  I then did a post-hoc analysis of means to see which group was different.  What I found was strong evidence of a difference between the caffeine group and both the water and decaf groups

]]> 2021-03-28 14:55:12 UTC https://padlet.com/bloosmore1/3jh0t6y73fxgfgon/wish/1361442612