Experiment Approach fr Randy
Experiment Approach
Before Experiment (hermit, cabin boys, etc), we need to convey:
1. Bacteria is the cause of food borne illness
2. Washing removes bacteria / pirates are observed to not wash / this is probably not a curse
3. Agar plates are the way to measure bacteria
4. You can’t conduct an experiment with one pirate, there needs to be a sample of several (how many?)
Experiment Design
1. Make the case to the captain where you:
a. State your hypothesis
b. State constants and variables
Randy’s Feedback
1. Experiment:
a. How many pirates do we need
More is better, certainly more than 3, 5-6 would probably do it.
b. Should we do 12 pirates and swab before and after washing or 12 pirates, 6 no washing and 6 washing
He said either would work. It may be too simple to analyze the data of 6 who wash 6 who don’t. If we do the pre and post… We could discuss variability. 6 who wash, 6 who don’t, some of the non-washers could be a little clearer, some of the wash could vary (based on how long they wash their hands, etc). In general… what are your conclusions… and then discuss why some of the variability is there?
HIS DECISION! Post test only design: To match our others… our ivs could be no washing, wiping hands on pants, rinsing with water, washing 20 secs with soap and drying on towel. 16 pirates, 4 pirates in each category… with some variability in results… (pants, some got worse, some got better, but still not as good as washing… why? Some pants are really dirty.)
c. Can he write the 4 before experiment scripts
d. What is the hypothesis for our experiment
You tell the captain that it is clear that bacteria on the hands can cause food illness. She says that she can just rub the bacteria off on her pants… she is skeptical… as long as hands don’t look dirty, you are fine. she’s not going to ask her pirates to wash. IF I can prove to you, that washing hands removes bacteria, will you make the men do it… will you go get brownbeard? thus, the way you wash your hands does make a difference. Predict which one you think will work best, the hypothesis is if we wash hands with soap, water and drying with a paper towel we’ll have the fewest bacteria count. Pull downs could be… if I blank then blank… they have to pick the right one.
e. How does the player interpret the data?
“Was their hypothesis supported by the results (not “proven” or “true” but “supported)? Yes or no… washing hands can remove bacteria and the type of handwashing is important
Experiment
1. Pick pirates
2. No wash group, wash with water, wipe on pants, soap)
3. Wait 24 hours
4. Interpret data
5. Report to cap’t and she’s impressed
Before Experiment (hermit, cabin boys, etc), we need to convey:
1. Bacteria is the cause of food borne illness
2. Washing removes bacteria / pirates are observed to not wash / this is probably not a curse
3. Agar plates are the way to measure bacteria
4. You can’t conduct an experiment with one pirate, there needs to be a sample of several (how many?)
Experiment Design
1. Make the case to the captain where you:
a. State your hypothesis
b. State constants and variables
Randy’s Feedback
1. Experiment:
a. How many pirates do we need
More is better, certainly more than 3, 5-6 would probably do it.
b. Should we do 12 pirates and swab before and after washing or 12 pirates, 6 no washing and 6 washing
He said either would work. It may be too simple to analyze the data of 6 who wash 6 who don’t. If we do the pre and post… We could discuss variability. 6 who wash, 6 who don’t, some of the non-washers could be a little clearer, some of the wash could vary (based on how long they wash their hands, etc). In general… what are your conclusions… and then discuss why some of the variability is there?
HIS DECISION! Post test only design: To match our others… our ivs could be no washing, wiping hands on pants, rinsing with water, washing 20 secs with soap and drying on towel. 16 pirates, 4 pirates in each category… with some variability in results… (pants, some got worse, some got better, but still not as good as washing… why? Some pants are really dirty.)
c. Can he write the 4 before experiment scripts
d. What is the hypothesis for our experiment
You tell the captain that it is clear that bacteria on the hands can cause food illness. She says that she can just rub the bacteria off on her pants… she is skeptical… as long as hands don’t look dirty, you are fine. she’s not going to ask her pirates to wash. IF I can prove to you, that washing hands removes bacteria, will you make the men do it… will you go get brownbeard? thus, the way you wash your hands does make a difference. Predict which one you think will work best, the hypothesis is if we wash hands with soap, water and drying with a paper towel we’ll have the fewest bacteria count. Pull downs could be… if I blank then blank… they have to pick the right one.
e. How does the player interpret the data?
“Was their hypothesis supported by the results (not “proven” or “true” but “supported)? Yes or no… washing hands can remove bacteria and the type of handwashing is important
Experiment
1. Pick pirates
2. No wash group, wash with water, wipe on pants, soap)
3. Wait 24 hours
4. Interpret data
5. Report to cap’t and she’s impressed
posted by Pamela at 9:07 AM
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