experimental designs + types

Question 1

independent groups

Answer 1

different people divided into 2 groups kept independent from eachother

Question 2

pros of independent groups

Answer 2

-less chance of demand characteristics
- no order effects

Question 3

negatives of independent groups

Answer 3

-participant variables (iQ)
-Expensive

Question 4

solution to participant variables

Answer 4

random allocation to reduce bias

Question 5

repeated measures

Answer 5

one group of participants repeatedly measured on the dv

Question 6

pros of repeated measures

Answer 6

• cheaper(less people needed)
• reduced participant variables (same people)

Question 7

negatives of repeated measures

Answer 7

• demand characteristics
  -order effects (fatigue and practise)

Question 8

solutions to order effects

Answer 8

• counterbalancing (ABBA)
  split into 2 halves…..

Question 9

matched pairs

Answer 9

• 2 or more group’s experiencing different levels of IV
• matched on participant variable (same iQ)

Question 10

pros of matched pairs

Answer 10

• removes a specific participant variable
• reduces demand effects
• no order effects

Question 11

negatives of matched pairs

Answer 11

• more participants needed
• difficult and time consuming