Quantitative- factorial designs

Question 1

What is a factorial designs

Answer 1

• a design that has more than one independent variable

Question 2

vocab

Answer 2

a 2-factor study with 3 levels of one factor and 2 levels of the other factor is a 3x2 design and it has 6 conditions

Question 3

main effect

Answer 3

A main effect is the effect of one independent variable on the dependent variable.

• there is one main effect for each dependent variable.
• eg. a study to see how tutoring and extra homework help to improve math scores. As there are two independent variables (tutoring and extra homework), there are two main effects:
  1. The effect tutoring has on math scores.
  2. The effect extra homework has on math scores.

(look across and down)

Question 4

interaction effect

Answer 4

The two independent variables can also work together on the dependent variable. In that case, the effects are called interaction effects.

Question 5

simple main effect definition

Answer 5

the overall effects of an independent variable

Question 6

simple interaction effects definition

Answer 6

when the effect of one IV variable depends on the level of another IV

Question 7

example of interaction with no main effects

Answer 7

Godden & Baddeley (1975): Is learning context-dependent?
Four conditions:
Learn on land – recall on land
Learn on land – recall under water
Learn under water – recall on land
Learn under water – recall under water

Question 8

mixed factorial with counterbalancing

Answer 8

Riskind & Maddux (1993):
Between-Ss variable: High self-efficacy vs. low self-efficacy
Within-Ss variable: “Looming”
DV: Fear
Main effect- high self efficacy were less afraid, looming people more afraid
Interaction effect: more fear with looming but more for people with low self efficacy

Question 9

as the number of conditions increases…

Answer 9

the number of participants needed also goes up

for between subject designs

Question 10

within subject design participant number

Answer 10

all participants can take place in each condition

Question 11

2x2 mixed design (participants needed)

Answer 11

eg. Interested in recall and whether listening to mozart or silence on rock music effects word recall.
BUT
Also intersted if picture stimuli makes a difference or not
factors: music and typle of list (visual or not)
levels:
music- rock, mozart or silence
list type- with words or with visual stimuli and words
between subjects: pictures vs words