More Complex Experiments

Question 1

Designs with two or more independent variables

Answer 1

Factorial Design

Question 2

Simplest factorial design?

Answer 2

2 x 2 Design

Question 3

What is a 2 x 2 design?

Answer 3

Two independent variables each with two levels

Question 4

How many cells in a 2 x 2 design?

Answer 4

Four

Question 5

What is a participant variable?

Answer 5

A level which is selected (measured) but not manipulated - can be used as an independent variable in a factorial design

Question 6

What is a Main Effect?

Answer 6

The possible effect of each independent variable (independent of the other variables)

Question 7

How many Main Effects in a 2 x 2 x 2 design?

Answer 7

Three

Question 8

How do you determine if there was a main effect for Variable A using a bar graph?

Answer 8

Find average point between lines for level One and Two - draw a line - if line is sloped there IS a main effect, otherwise there is not.

Question 9

How do you determine if there was a main effect for Variable B using a bar graph?

Answer 9

Find midpoint of each line - if they do NOT touch then there IS a main effect, otherwise there is no main effect

Question 10

What is an Interaction?

Answer 10

When one things changes because (or due) the another variable - interaction of two variables

Question 11

If lines are parallel what, does this mean?

Answer 11

There is NO interaction

Question 12

If lines are NOT parallel, what does this mean?

Answer 12

There is an Interaction

Question 13

When a study finds an interaction and main effects, which is more important?

Answer 13

Interaction

Question 14

What type of design:

2 X 2 design = 4 independent groups (tested on 1 level each)

Answer 14

Independent group design

Question 15

What type of design:

2 x 2 design = 1 group (tested on all levels)

Answer 15

Repeated Measure design

Question 16

What type of design involves 2 groups (IV one) who are each measured on 2 different levels of an independent variable (IV 2)?

Answer 16

Mixed factorial design

Question 17

What are two ways to make a factorial design more complex?

Answer 17

Increase number of levels of an independent variable (2 x 3)

Increase number of independent variables (2 x 2 x 2)

Question 18

How many variables in a 2 x 3 design?

Answer 18

2

Question 19

How many cells in a 2 x 3 design?

Answer 19

6

Question 20

How many levels in a 2 x 3 design?

Answer 20

5

Question 21

How many main effects possible in a 2 x 3 design?

Answer 21

2

Question 22

How many possible interactions in a 2 x 3 design?

Answer 22

1

Question 23

How many interactions possible in a 2 x 2 x 2 design?

Answer 23

4

AB, AC, BC, ABC

Question 24

What design is used when you can’t use random assignment?

Answer 24

Quasi-Experimental

Question 25

What is a parallel group?

Answer 25

When a group doesn’t receive treatment until later so they can be used as a control group