CHAPTER 1

Question 1

Between-subjects design

Answer 1

Each person is randomly assigned to one of the experimental conditions (different groups of subjects)

Question 2

Advantages (BS)

Answer 2

• simplicity
• less chance of learning and fatigue effects

Question 3

Disadvantages (BS)

Answer 3

• more participants needed
• less info on individual

Question 4

Within subjects design

Answer 4

Each person is assigned to more than one experimiental condition (same for everyone)

Question 5

Advantages (WS)

Answer 5

• less people needed
• great statistical power

Question 6

Disadvantages (WS)

Answer 6

• fatigue: longer time of participation
• treatment order may confound results

Question 7

Mixed design

Answer 7

Experiment icludes at least one BS and one WS

Question 8

Internal validity, threats and solutions

Answer 8

Trustworthy, accuracy and rigorousness of research methods

Threats:
- confounding variables (random assignment of participants)
- diffusion (isolate groups)
- testing effect (randomizing order of treatment)

Question 9

External validity, threats and solutions

Answer 9

Meaningful, applicability of the outcome to the real world

Threats:
- participant characteristics (representative sample of the population)
- situations (measurement of DV mimics the real task and experiment context mirrors reality)