Research issues

Question 1

what are extraneous variables

Answer 1

• variable other than IV that may affect the DV if not control

Question 2

what are confounding variables

Answer 2

• varies systematically with the IV
• can’t tell if a change in the DV is due to the IV

Question 3

what are demand characteristics

Answer 3

• cue from the research situation that be interpreted by participants as revealing the purpose of an investigation
• participant may change their behaviour

Question 4

what are investigator effects

Answer 4

• any effect of the investigator’s behaviour on the research outcome
• design of the study, participants selected

Question 5

what is randomisation

Answer 5

• use of chance methods to control for the effects of bias when designing materials and deciding the order of experimental conditions

Question 6

what is standardisation

Answer 6

using the same formalised procedures and instructions for all participants in a research study