Control of variables Flashcards
1
Q
Extraneous variable (EV)
A
- any variable other than the independent variable
- that may have an effect on the dependant variable
- if it is not controlled
- DO NOT VARY SYSTEMATICALLY WITH THE IV
2
Q
Extraneous variable (EV) Example
A
- age of participants
- demand characteristics
3
Q
Confounding variable (CV)
A
- any variable other than the independent variable
- that may have an effect on the dependant variable
- if it is not controlled
- VARY SYSTEMATICALLY WITH THE IV
4
Q
Confounding variable (CV) Example
A
-personality of participants
5
Q
Demand characteristics
A
- any cue from the researcher or research situation that may reveal the purpose of the investigation to the participants
- which may cause them to change their behaviour accordingly
6
Q
Demand characteristics
effects
A
- please U effect
- screw U effect
7
Q
Investigator effects
A
- any effect of the investigators behaviour (conscious or unconscious)
- on the research outcome (the DV)
8
Q
Investigator effects
Examples
A
- design of study
- selection and interaction with participants
- leading questions
9
Q
Randomisation
A
-the use of change in order to control the effects of bias
10
Q
Standardisation
A
-using the same procedures and instructions for all participants in a research study
