exam 3 Flashcards
evaluating generalizations 4 questions
- was the correct group sampled?
- was the data obtained in an effective way?
- tools, timing, wording of questions - were enough cases considered?
- was the sample reasonably structured?
qualitative
theoretical situation, interviews
quantitative
power analysis, surveys
coincidences
- two or more events occur together by chance
correlations
- two or more events occur together several times
- doesnt necessarily mean the two events cause each other
causes
- when two or more events occur together and the earlier event influences the later one
- studying effects your grade
erroneous generalization (inductive fallacy)
- generalizing based on too little information
ex. meet one dumb blonde and say all blondes are dumb
playing with numbers (inductive fallacy)
- misapplying statistical tests, exaggerating small numbers
ex. 80% of students on campus drink. they dont tell you they only asked 20 people
false dilemma (inductive fallacy)
- assuming incorrectly that all options are bad options
ex. if I dont study I will do poorly on the exam. but if I do study I may overdo it and suffer from burnout - there are other options
gamblers fallacy (inductive fallacy)
- improperly connecting events that happened due to chance
ex. I flipped a coin 9 times and it was tails every time. what will I get if I flip it again?
false cause (inductive fallacy)
- assuming that if B happens right after A. A causes B.
ex. I aced my math test after I ate Tutors for breakfast. My math test brilliance was caused by eating that biscuitt
slippery slope (inductive fallacy)
- assuming that an event will automatically start a long chain of events
ex. if you skip one class, you will not be able to catch up with notes and then you will fail the class, and college, and then at life
denying the consequent (deductive reasoning)
p1: if A, then B
p2: not B
C: therefore, not A
if yesterday was friday, then today is saturday
but today is not saturday
therefore yesterday could not have been friday
affirming the antecedent (deductive reasoning)
p1: if A, then B
p2: A
C: therefore, B
if you go the speed limit then you should get out of Luda’s way
you go the speed limit
therefore, you get out of Luda’s way
applying a generalization (deductive reasoning)
p1: every member of F is a member of G
p2: person X is a member of F
C: so, X is a member of G
everyone who plays sports runs the risk of injury
Lucy plays a sport
so, Lucy runs the risk of injury
applying an exception (deductive reasoning)
p1: every member of F is a member of G
p2: person X is not a member of G
C: so, X is not a member of F
Every member of the avengers is a superhero
President Gee is not a superhero
So, President Gee is not a member of the avengers
disjunctive syllogism (deductive reasoning)
p1: either A or B
p2: Not A
C: therefore B
saturday night I will either stay home or go to the concert
I am not going to stay home
therefore, I am going to the concert
transitivity (deductive reasoning)
if X has a relationship to Y and Y has the same relationship to Z, then X has that transitive relationship to Z
if X=Y and Y=Z then X=Z
If melisa is the same age as you and you are the same age as your BFF, then melisa is the same age as your BFF
reflexivity relationship (deductive reasoning)
two objects relate to each other in the same way
A=B then B=A
if Jan is married to Roger, then Roger is married to Jan
affirming the consequent (deductive fallacies)
if A is true then B is true
B is true
then A must be true
if she rides a bike to school then she will be out of breath
she is out of breath
therefore she rode a bike to school
- she could have done other things to be out of breath
denying the antecedent (deductive fallacies)
if A is true then B is true
A is not true
therefore B is not true
if I am in Morgantown then I am in WV
I am not in Morgantown
therefore I am not in WV
- you can be in WV and not be in motown
false classification (deductive fallacies)
the false assumption that is person X is part of group G then they are automatically a part of subgroup F
person plays for the Redwings
many redwings players are in the hall of fame
therefore person is in the hall of fame
fallacies of division (deductive fallacies)
- occurs when we say what is true of the group is true of all the individuals
people can drink outside of the bars on Burbon street.
you are on Burbon street
therefore you are drinking outside of the bars
fallacies of composition (deductive fallacies)
- occurs when we say what is true of one person in a group is true of every person in the group (stereotype)
If a runner runs faster then she can win the race, therefore if all the runners run faster they can all win the race
inductive reasoning
- bottom up
- conclusions are probabilistic
- depends on evidence at hand
- remains subject to revision/rejection based on new info