Extraneous Variables

Question 1

What are extraneous variables

Answer 1

Factors which can influence the DV other than the IV

Question 2

What are demand characteristics

Answer 2

Participants acting on cues to influence their behaviour

Question 3

What is the Please-U effect

Answer 3

Participants acting in a way that is expected

Question 4

What is the Screw-U effect

Answer 4

Participants deliberately acting in a way that isn’t expected

Question 5

What is the investigator effect

Answer 5

Anything the investigator does that has an effect on a participants performance in a study other than what was intended

Question 6

What are participant variables

Answer 6

Certain characteristics associated with participants- age, personality, gender

Question 7

What are situational variables

Answer 7

Factors associated with the environment that could have an effect on the study

Question 8

How do you control extraneous variables

Answer 8

Randomisation- use chance wherever possible to reduce investigator effects

Question 9

What is standardisation

Answer 9

Using the exactly the same formalised procedure and instructions for all participants in a research study