Research Methods - Control of Variables

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  • Created by: emortimer
  • Created on: 18-05-16 15:35
Extraneous variables (EV)
Any variables, other than the independent variable that may have an effect on the dependent variable if it is not controlled. EVs are essentially nuisance variables that do not vary systematically with the IV
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Confounding variables
Any variables, other than the IV, that may have affected the DV so we cannot be sure of the true source of changes to the DV. Confounding variables vary systematically with the IV
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Demand characteristics
Any cue from the researcher or from the research situation that may be interpreted by participants as revealing the purpose of the investigation. This may lead to a participant changing their behaviour within the research situation
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Investigator effects
Any effect of the investigator's behaviour (conscious or unconscious) on the research outcome (DV). This may include everything from the design of the study to the selection of, and interaction with, participants during the research process
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Randomisation
The use of chance in order to control for the effects of bias when designing materials and deciding the order of conditions
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Standardisation
Using exactly the same formalised procedures and instructions for all participants in a research study
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Card 2

Front

Any variables, other than the IV, that may have affected the DV so we cannot be sure of the true source of changes to the DV. Confounding variables vary systematically with the IV

Back

Confounding variables

Card 3

Front

Any cue from the researcher or from the research situation that may be interpreted by participants as revealing the purpose of the investigation. This may lead to a participant changing their behaviour within the research situation

Back

Preview of the back of card 3

Card 4

Front

Any effect of the investigator's behaviour (conscious or unconscious) on the research outcome (DV). This may include everything from the design of the study to the selection of, and interaction with, participants during the research process

Back

Preview of the back of card 4

Card 5

Front

The use of chance in order to control for the effects of bias when designing materials and deciding the order of conditions

Back

Preview of the back of card 5
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