7. Experimental Design
Put the last names of the 50 male volunteers in alphabetical
order. Do the same for the female volunteers. Analyze the
number of ulcers of all volunteers prior to the experiment.
Assign male volunteers a unique number from 1-50 on slips
of paper. Do the same for the females.
Mix up slips of the male volunteers in one hat and mix
female volunteers in another hat of the same size.
8. Experimental Design (2)
Draw 25 slips from each hat. The first 25 slips
drawn for male and female are assigned to the
Jalapeño (Spicy) and the remaining slips
receive the control pepper (Not Spicy).
Find the difference of ulcers before and after
the treatments. Then compare the differences
between control males and experimental
males. Do the same for the females and record
data found.
9. Experimental Design Principles in This
Study
Control- A control group is needed in this
experiment to compare the differences in ulcers
before and after the treatments. Then you compare
the control group with the experimental group to
see if spicy foods really do cause ulcers.
Randomization- Randomization is used in this
experiment when assigning the control treatment
and the experimental treatment to minimize bias.
10. Experimental Design Principles in This
Study (2)
Replication- Replication will be used in this
experiment because once the experiment is
finished with the first 100 volunteers, it will
be repeated several times with new
volunteers.
11. Is Blocking Used?
Yes, blocking is used in this experiment when
the 100 volunteers were separated into 50
females and 50 males. It is used because the
anatomy of males and females is different so
this may have an affect on the ulcers formed,
if any.
12. Is Blinding Used?
Blinding is not used in the experiment because
people can tell if they receive a hot pepper or
regular pepper. It is not necessary to blind the
patients from what treatment they are given. It
does not matter if patients lie or overreact about
getting ulcers from spicy foods. Results will be
collected through the use of physical examination
and/ or some type of MRI to record number of
ulcers in each volunteer.
13. Concerns
Ethics – People volunteering to eat peppers
which may induce ulcers, which is painful and
bad for the body.
Experiment uses one pepper, does not take in
to consideration how much quantity of
spiciness a person can take before getting an
ulcer
14. Conclusions
Based on the “results” of the experimented, it
is concluded that spicy foods do NOT cause
ulcers in both males and females.
