Factorial Designs and Latin Square

Factorial Designs use _____independent variables (aka factors)

• 1

• 1-2

• 2

• 2 or more

What are the advantages of using a factorial design?

• Cost efficient

• Can more easily test a combination of treatments

• Allows for smaller sample sizes

• Allows for convenient implementation in field settings

• Allows for testing interactions

Levels are the number of groups or conditions for each ________ variable.

What type of effect is shown?

Crossed and Nested Designs are synonymous

• True

• False

• Sometimes

Answer explanation

False! A crossed design is when each level of each IV is exposed to all levels of all other IVs. Whereas, a nested design only some levels of one factor are not exposed to all levels of all factors.

Fill in the sequence of the missing treatments for a Latin Square Design

e

d

f

g

c

b

E

D

C

A

C

D

D

What design is most practical when the treatments promise short-term relief, work quickly, and when participants are willing and able to continue through both treatments?

• Latin-square Design

• Longitudinal Design

• Crossover Design

• Nested Design