Variables

• What is an extraneous variable?

  Extra variables needed to be controlled as they impact the IV as well as the DV
• What is a confounding variable?

  An extra variable that systematically changes with the IV

  Usually unexpected
• What is a demand characteristic?

  When Ps behave differently due to the experiment.

  ‘Please you/screw you‘ dilema
• What are investigator effects?

  The actions and behaviours of the researcher impacting the Ps performance
• What is Standardisation?

  Regulated variables so that all Ps have the same experience during the study
• What is Randomisation?

  Random allocation and generalisations used in studies to minimise affects of bias in a study