Extraneous Variables

Question 1

Participant variables

Answer 1

Personal Characteristics of the participant

Question 2

Investigator effects / experimenter variables

Answer 2

When the researcher influences the behaviour of the participants / researches behaviour / personality / appearance

Question 3

Situational Variables

Answer 3

Features of the eternal environment that can affect the results of a study

Question 4

Demand Characteristics

Answer 4

Participants behave a certain way to impress or be helpful to the researcher

Or they may rebel and behave the opposite way

Question 5

Standardisation

Answer 5

When researchers make an extraneous variable the same for all participants in a study.

Question 6

Random Allocation

Answer 6

^ self explanatory

Question 7

Single blind study

Answer 7

Participants don’t know which experimental group they’re in

Question 8

Double blind study

Answer 8

neither the researcher not the participants know which experimental group the participants are in