Control of Variables 0.0 / 5 ? PsychologyResearch methods and techniquesA2/A-levelAQA Created by: StarDazeCreated on: 07-04-17 14:46 Extraneous Variables Unwanted variables which could have an effect on the DV if not controlled. 1 of 6 Confounding Variables Unwanted variables which may have affected the DV, hindering clarity of distinguishing cause and effect. 2 of 6 Demand Characteristics Cues which hint the purpose of study and alter participant behaviour. 3 of 6 Investigator Effects Any influence from investigator on study which could affect DV. 4 of 6 Randomisation The use of chance to control the effects of bias in research. 5 of 6 Standardisation Using the same formal procedures and instructions for all participants. 6 of 6
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