experimental design

Question 1

Define Experimental design

Answer 1

experimental design refers to how you allocate your participants to different conditions in an experiment

Question 2

what are the three types of experimental design

Answer 2

independent groups
matched pairs
Repeated measures

Question 3

Explain independent groups

Answer 3

Participants take part in one condition
a separate group is required for each condition = the results for each group of them compared by collecting mean results

Question 4

what are the positives and negatives of independent groups

Answer 4

+ avoids order effects
- needs a lot of participants = costly

Question 5

explain repeated measures

Answer 5

Participants Take part in all conditions ( so everyone experiences the control and experimental condition)
the results of the two conditions are then compared

Question 6

evaluate repeated measures

Answer 6

+ avoids participant variable
- demand characteristics more likely as participants are more likely to guess the aim

Question 7

evaluate repeated measures

Answer 7

+ avoids participant variable
- demand characteristics more likely as participants are more likely to guess the aim

Question 8

define counterbalancing (a part of repeated measures)

Answer 8

alternating the order in which participants take part in different conditions

Question 9

define matched pairs

Answer 9

participants have matched in each condition fort any characteristic that might affect performance (e.g: age, gender, IQ)
results are compared between members of each pair

Question 10

evaluate matched pairs

Answer 10

+ reduces order effects and demand characteristics
- impossible to match pairs exactly (confounding variables)