Experimental Design

Question 1

A study where researchers assign treatments/ behaviors to participants

Answer 1

An experiment

Question 2

Participants select their own treatments and behaviors without interference from researchers

Answer 2

Observational study

Question 3

Can an observational study determine cause and effect?

Answer 3

No

Question 4

Smallest subdivision to which a treatment is applied (subject)

Answer 4

Experimental unit

Question 5

A condition or behavior imposed upon the experimental unit

Answer 5

Treatment

Question 6

Variable that researchers directly control to induce changes in response variable

Answer 6

Explanatory variable

Question 7

Variable researchers don’t directly control but are interested in truing to influence via explanatory variable

Answer 7

Response Variable

Question 8

Used to provide baseline of comparison

Answer 8

Control group

Question 9

Subjects are assigned to treatment groups. They receive their treatments then the response variable for each subject is measured once.

Answer 9

Completely randomized design

Question 10

Each experimental unit produces a pair of measurements and we compare the difference for each treatment

Answer 10

Matched pair designs

Question 11

Each subject is compared against their own baseline

Answer 11

Matched pair

Question 12

We compare the average value of the response against groups

Answer 12

Completely randomized