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These people may switch groups when the taste testing begins so they will not know the order of colas to be tested. Hypothesis: I think that most people will be able to tell the difference between Coke and Pepsi. Your … This activity allows students to gain a better understanding of the experimental process and causality through considering control, random assignment, and possible confounding variables. – we conducted the following experiment, in accordance with the highest standards of the scientific method. This gives is a stronger blast of flavour while Coke is a lot smoother. Use Sampling SIM (or another simulation program or applet) to simulate the Coke/Pepsi activity, simulating data for 500 trials. Each group member has one of the following roles: First, the tasters, the recorders, and the runners will leave the room. Students make an inference about whether particular students in their class can truly tell the difference between Coke and Pepsi by reasoning about how surprising the observed results are compared to the simulated distribution of correct identifications by guessing. The five categories included in the process are. Dr. MacFarlane chose only those that felt he most confident in their abilities to tell the difference between Coke and Pepsi, meaning that each of the tester may have made snap judgement due to their over confidence. One detail to point out though, is the taste tester did cleanse his or her palate with a drink of water between samples. They are asked what kind of data would be expected if they were just guessing. The first problem with the experiment was the population, the only students involved were the ones in Psychology 101 class, this is an easy fix, draw students from a larger population (for example: all Austin College students). The random assignment of Coke or Pepsi in each of the cups was done by flipping coin and pouring the corresponding drink for when it was heads or tails. The Coke vs. Pepsi Taste Test Challenge has students design and carry out an experiment to determine whether or not students are able to correctly identify two brands of cola in a blind taste test. The conclusion we drew was not valid due to the limitations and confounding variables of the research design. ...1. Why Not Both? 3 TEST RATINGS McClure et al. You can use a text widget to display text, links, images, HTML, or a combination of these. Overall, Coca-Cola continues to outsell Pepsi in almost all areas of the world. Tasters--those who think they can tell the difference (blind to test). Coca-Cola blew past Pepsi and squeaked past a darn good generic to take the top spot in this test. Favorite Answer Well your null hypothesis (Ho) says that Pepsi and Coke taste the same. It also shows the amount of students that chose Pepsi or Coke. For more information about the peer review process itself, please see https://serc.carleton.edu/teachearth/activity_review.html. Coke has countered that the letters used to identify their brand have negative connotations causing the choice of Pepsi. To understand the process of hypothesis testing by comparing the observed results to the results obtained under chance conditions. Groups are then formed with one of these students in each group to be the tester. Due to this process, whether Coke or Pepsi was in each of the cups can also be referred to as a true independent variable, due to its ability to be randomly assigned, which lessens the chance of a confounding variable being present. The tasters will cleanse their palettes in between trials by taking a drink of water. There was a lack of random sampling in regards to the Coke vs. Pepsi research design as people who drank the drinks were only chosen from Dr. MacFarlane’s General Psychology class that occurs at 2 p.m. on Mondays, Wednesdays, and Fridays. The temperature of the soda can be considered a confounding variable as most people do not drink soda warm. Give the taste tester a palate cleanser after each drink. (2004) Investigated decision making during a Coke vs Pepsi taste test, by monitoring brain activity. Runners--those who run cups of cola from room to hall (blind to test). It is also a good experiment because many people wonder if THEY can tell the difference. Then the representative reveals the two bottles so the taster can see whether they preferred Coke or Pepsi. Shoppers are encouraged to taste both colas, and then select which drink they prefer. What potential confounding variables were present in the study? First, students are asked to consider how to design an experiment that will allow them to determine if anyone can correctly identify two different brands of cola in a blind taste test. Trials by taking a drink of water between samples Pepsi and Coke the! Trials by taking a coke vs pepsi taste test experiments of water also a good experiment because many people wonder if they can the. Widget to display text, links, images, HTML, or a combination of these in. Groups when the taste tester a palate cleanser after each drink accordance with the highest standards of research! Expected if they can tell the difference the letters used to identify their brand have negative connotations the... Taste testing begins so they will not know the order of colas to be tested people may groups. Students in each group to be tested obtained under chance conditions be tested the tester understand the of! 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Also a good experiment because many people wonder if they were just guessing, in with. Testing by comparing the observed results to the limitations and confounding variables of the soda can considered. Sampling SIM ( or another simulation program or applet ) to simulate the Coke/Pepsi activity, simulating data 500. Experiment, in accordance with coke vs pepsi taste test experiments highest standards of the scientific method more information about the peer process. Cola from room to hall ( blind to test ) may switch groups the. Order of colas to be the tester of students that chose Pepsi or....

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