Experimental designs

• In an independent groups design, are separate groups used for each level of the IV?

  Yes, separate groups of people
• What two groups are usually present in an independent groups design?

  A control and experimental group
• What is not a problem in independent groups designs?

  Order effects
• Why are order effects not a problem in independent groups designs?

  Participants only do the task once
• What is a weakness of independent groups designs?

  Participant variables may affect results
• What can researchers use to combat participant variables in independent groups design?

  Unbiased allocation to conditions
• What is a strength of repeated measures designs regarding participant variables?

  There are no participant variables
• Why does repeated measures need fewer participants than independent groups?

  Each participant is compared against themselves
• What is a weakness of repeated measures designs?

  Order effects occur
• What is counterbalancing used for in repeated measures designs?

  Dealing with order effects
• In a matched pairs design, what are participants tested in terms of?

  Variables relevant to the study
• After being tested, what happens to participants in matched pairs designs?

  They are matched
• What is not a problem in matched pairs design?

  Order effects
• How does matched pairs design reduce participant variables?

  Participants are matched on relevant variables
• What is a weakness of matched pairs designs regarding participant matching?

  Takes time and effort
• What is the target population?

  The group the researcher is studying