One-Way ANOVA
ANOVA and One-Way ANOVA are the same things.
Yes! ANOVA is the general term. ANOVA is automatically One-Way ANOVA. That is why all the other ANOVAs have specific names.
How many IV(s) does a 2-way ANOVA have?
2+ IVs with multiple levels
What does ANCOVA do?
Takes into account the extra variable (covariate) or factor that might influence the dependent variable but are not interested in analyzing.
What does rmANOVA do?
- Same participants are being tested multiple times
- Allows us to have the same participants/subjects to experience each level of the IV more than once.
What is the purpose of the Mixed Factor ANOVA?
To use when you have at least 1 between-subjects IV and 1 within-subjects IV.
How many IV(s) does a One-Way ANOVA have?
1 IV with multiple levels
What is the purpose of the 2-Way ANOVA?
To examine more than one independent variable, each with the possibility of having multiple levels
How many IV(s) does ANCOVA have?
1 IV, but it has 1 covariate
How many IV(s) and DV(s)? If there are any levels, how many?
1 IV, with multiple levels
1 DV
How many IV(s) and DV(s) does the Mixed Factor ANOVA have? How many levels?
2 IVs with multiple levels
1 DV
What is the purpose of the One-Way ANOVA?
Compare means with more than two levels of IV
Usually, how many sets of hypotheses does the 2-way ANOVA have? What are they?
4 sets. Overall, Main Effects Factor A, Main Effects Factor B, Interaction Effects.
What is another word for covariate?
Confounding Variable.
What type of error does rmANOVA reduce?
Error Variance
How are Mixed Factor ANOVA and rmANOVA different?
Mixed Factor ANOVA has a between-subjects variable. rmANOVA does not.
How are T-test and One-Way ANOVA different?
With ANOVA you can compare all the levels of an IV simultaneously. A T-test cannot do this.
(2 x 4) x 3.
Can you tell me how many groups? How many levels each group has? Which group(s) are within subjects and which are between subjects?
3 groups.
Factor 1 = 2 levels, Factor 2 = 4 levels, Factor 3 = 3 levels
Within: Factors 1 and 2
Between: Factor 3
Does ANCOVA repeat testing on the same participants?
No, ANCOVA is a between-subjects testing.
within-subjects; repeating testing with the same participants/subjects
Does this test allow us to have different groups as well as repeated testing for these different groups?
Research Question:
Does the type of major significantly affect the amount spent studying a student does per day?
Majors: Psychology, Chemistry, English, Child Development
What is the IV? What are the levels? What is the DV?
IV= type of major
Levels = Psychology, Chemistry, English, Child Development
DV= amount spent studying per day
Research Question:
You want to examine the affect of sexual orientation and family acceptance on depression.
Sexual orientation: gay, straight, pansexual, asexual
Family acceptance: 0 = yes, 1 = no
Depression: severely depressed, mildly depressed, no depression
What are the IVs? What are the levels of the IVs?
IVs = #1 sexual orientation, #2 family acceptance
Levels = #1: 4, #2: 2
Research Question:
I the researcher am interested to see if the amount of sleep has an effect on exam performance. I acknowledge time spent studying may also influence exam performance.
What is the IV? The covariate? The DV?
IV= amount of sleep
Covariate= time spent studying
DV= exam performance
Research Question:
Are grades in a given class consistent across different professors?
Four professors (Dr. T, Dr. S, Dr. N, Dr. C) who teach psychology 300 were given the same set of 8 exams to grade.
What is the IV? What are the levels? What is the DV?
IV= the professors
Levels: Dr. T, Dr. S, Dr. N, Dr. C
DV= set of 8 exams to grade
Research Question:
Toddlers between the ages of 2-5 were examined to test if a behavior is learned through modeling or innate. Half of the children were modeled a new behavior, followed by a controlled situation where behavior might appear. The other half was NOT modeled a new behavior, then followed a controlled situation where an innate behavioral response might appear. The children then were switched to the opposite group. The children were examined before modeled behavior, and after.
What are the IVs? What are the levels? Which is between and which is within? What is the DV?
IV #1: type of behavior; modeled behavior vs. no modeling (between)
IV #2: time; before modeled behavior (T1), after modeled behavior (T2)