Experimental Designs: Independant Groups Design

Question 1

Describe independent groups design?

Answer 1

Experimenter can manipulate variables 👉🏼 compare differences 👉🏼 identify CAUSE AND EFFECT relationships

Question 2

Difference between Repeated measures and Independent groups

Answer 2

Participant only tested once

Question 3

Non-Equivalent Groups Design

Answer 3

Pre test - Post test

Not Randomly allocated

Question 4

Strengths of NEGD

Answer 4

Comparing intact groups

Question 5

Weaknesses of NEGD

Answer 5

No randomisation to establish cause and effect relationship

Question 6

Randomised Group Design

Answer 6

Pre-Post tests occur

Allocation of each participant to a group randomly

Participants have an equal chance of being in experiment or control

Selection bias is removed

Question 7

Randomised Group Design
Strengths

Answer 7

No selection Bias
No participant bias
More reliable statistics
Individual different spread out

Question 8

Randomised Group Design
Weaknesses

Answer 8

Results might not resemble real life
Not receiving treatment (Ethical)

Question 9

Matched pairs design

Answer 9

One participant control group

One participant experimental group

Question 10

Matched pairs design
Strengths

Answer 10

Matched through certain characteristics
No order effects

Question 11

Matched pairs design
Weaknesses

Answer 11

Time consuming

Matches are never exact

Lots on confounding variables

Question 12

Quasi-experimental design
Strengths

Answer 12

Uses naturally occurring groups

Easy

Question 13

Quasi-experimental design
Weaknesses

Answer 13

Reduces experimenter control

Increases threat from confounding variables

Hard to draw conclusions because of individually difference