Busy day today! We crafted an email and sent it to several Elk Grove Unified School District math and science experts as well as emailed Dr. Potter from University of the Pacific in Stockton about our water taste test.
Here is the email response from Mr. Pietersen. PLEASE read it closely and be prepared to come back to school tomorrow to discuss the points he raised.
PLEASE be sure to click on the wikipedia link to learn about the difference between a single vs. double blind taste test. Guess what I’m doing? Yep, clicking the link and reading, too! 🙂
Hello Mr. Bentley’s Class,
It sounds like you are doing a single blind taste test. Single vs double blind: https://en.wikipedia.org/wiki/Blind_taste_test
If the participants don’t know what they are drinking and the experimenters don’t know the participants, also they don’t know the exact brands of water and the source of the tap water, then it is double blind.
You are asking some interesting questions. Actually several questions:
1. Do people prefer tap to bottled water (if this is what you want I suggest narrowing to one source of tap water and one bottled water brand.). There are far too many variables that make tap water from different sources different, such as the type of plumbing, well water source or a city water source, fluorinated tap water and some areas don’t have fluorinated tap water and so on….because of this variation I would limit the study to the tap water served at, for example, Foulks rank elementary school. Also think about storing the tap water in the same plastic bottle as the “bottled water” therefore you consider the variation on how the water is held.
2. Which bottled water is preferred to tap water? If this is a question you really want then you might want to tell the person here is tap water then give them unknown bottled water (I’d even include an unknown tap water sample, to see if they can really tell the difference.)
Are you sure this statement is what you are doing? We do not want to compare bottled brands to each other. We do not want to compare tap and bottled against each other. We just want to see what people prefer in a blind taste test.
In any case good luck with your study. As in any study the larger your sample group (in this case tasters) the more likely your results will be considered credible.
Science Program Specialist,EGUSD
Curriculum & Professional Learning (C/PL)
Office: ( 916) 686-7797 ext. 7407
Fax: ( 916) 686-7743
Math: Finish big book Lesson 1.9 for homework. You do NOT have to do the On Your Own questions. The front side is ENOUGH! 🙂
Reading: Read 30 minutes aesthetically.