Question

                              

7. The simplest possible experimental design  

a. has one condition

b. has two conditions  

c. uses random assignment

d. is a multi-level experiment  

8. In a ________ design, participants are randomly assigned to one of two or more groups.  

a. pretest-posttest

b. repeated measures  

c. matched-participants

d. randomized groups

9. Which of the following is an advantage of matched-subjects designs over randomized groups designs?    a. fewer participants are needed

b. the experimental groups are more likely to be similar  

c. they are easier to conduct   

d. pretest sensitization is less likely  

10. Which of the following is an advantage of repeated measures over randomized groups designs?  

a. order effects are possible   

b. the experimental groups are likely to be more random

c. fewer participants are needed

d. fewer experimental conditions are used  

Answer 1

7

b. has two conditions  

Justification:

The simplest of all experimental designs is the two-group post-test-only randomized experiment.

8

Ans:

d. randomized groups

Justification:

In a randomized experimental design, objects or individuals are randomly assigned (by chance) to an experimental group. Using randomization is the most reliable method of creating homogeneous treatment groups, without involving any potential biases or judgments.

9.

Ans: a) fewer participants are needed

Justification:

One important type of experimental design is a matched-subjects design, also called a matched-group design, which is when subjects are matched on some variable that might be affecting the dependent variable and then split into two or more groups.

10.

Ans: d) fewer experimental conditions are used

Justification:

Repeated measures design uses the same subjects with every branch of research, including the control. For instance, repeated measurements are collected in a longitudinal study in which change over time is assessed.