lecture notes

Question 1

continuous data

Answer 1

ANOVA

Question 2

What type of inferential test analyzes the magnitude of difference between two means?

a) ANOVA
b) chis-square
c) ttest
d) factorial AONVA

Answer 2

C

Question 3

another word for row means and column means

Answer 3

marginal means

Question 4

Marginal means

Answer 4

the main effects of each factor (IV)

-seen in row and column totals

Question 5

interaction means

Answer 5

cell data

Question 6

What are the benefits of factorial ANOVA

Answer 6

1. allows us to capture more complexity
2. helpful in studying social and psychological phenomena b/c they are affected by more than one IV
3. allows us to examine the interactions of variables
4. it is economical- we can test multiple hypotheses simultaneously

Question 7

omnibus test

Answer 7

Omnibus tests are statistical tests that are designed to detect any of a broad range of departures from a specific null hypothesis

Question 8

partitioning variance in factorial ANOVA

Answer 8

SSgroups are partitioned even further than one way ANOVA- SSa, SSb, SSab (variance of each factor and then variance of interaction of factors)

Question 9

the higher your f…

Answer 9

the smaller and more significant your p will be

factorial ANOVA

Question 10

when your main effects and interaction effects are both significant which one do you interpret first?

Answer 10

YOUR INTERACTION

Question 11

An interaction occurs when…

Answer 11

the effects of one IV depend on the level of the other IV

Question 12

Tools to understand interaction effects

Answer 12

1. cell mean plots (visual pattern of interaction, ordinal/disordinal)
2. simple effects analysis (to determine the source of our significance- one way ANOVA)
3. Tukey HSD test (all possible pairs of cell means are tested)

Question 13

When do you use Tukey over simple effects analysis?

Answer 13

Simple effects analysis would be suitable when there are only two levels to each of the simple effects (if there were more than two levels then Tukey’s HSD would be preferable

Question 14

ordinal interaction

Answer 14

have simple effects that are in the same direction

Question 15

disordinal interaction

Answer 15

have simple effects that are in opposite directions

Question 16

parallel lines

Answer 16

there is no interaction

Question 17

when have disordinal interactions

Answer 17

you must be particularly careful when interpreting your main effects

Question 18

what type of data do ttests use?

Answer 18

continuous data

Question 19

which type of ANOVA has less error?

Answer 19

Factorial - because you explain a lot more of the variance