Experimental desgins

• What is an Independent group design?

  Two separate groups experience different conditions
• What happens when two levels of the independent variable are used in an Independent group design?

  Each participant experiences one level only
• In an Independent group design, what is the experimental condition example given?

  Participants drinking energy drink (A)
• In an Independent group design, what is the control condition example given?

  A different group drinking water (B)
• What are the three experimental designs mentioned?

  Independent groups, Matched pairs, Repeated measures
• What is a disadvantage of using Matched pairs design?

  It is time consuming
• Why is it difficult to use Matched pairs design?

  Hard to match participants on key variables
• What is a disadvantage related to the cost of Matched pairs design?

  It can be expensive
• What is an advantage of using Matched pairs design?

  Avoids order effects like practice effect
• How does Matched pairs design reduce guessing?

  Reduces chance of guessing experiment purpose
• What does Matched pairs design control for?

  Controls confounding variables
• What is a Repeated measures design?

  Each participant takes part in all conditions
• What is a disadvantage of using Repeated measures design related to participant experience?

  Could create boredom or fatigue
• Why might participants guess the aim of the study in Repeated measures design?

  They experience all conditions of the experiment
• What is an advantage of using Repeated measures design regarding participant variables?

  Controls participant variables, increasing validity
• How does Repeated measures design affect the number of participants needed?

  Fewer participants are needed
• What is a potential benefit of practice in Repeated measures design?

  Performance may improve through practice effects
• What is an example of a Repeated measures design?

  Participants experience both energy drink and water
• What is a disadvantage of using Independent groups design regarding participant variables?

  Cannot control effects of participant variables
• What is an example of a participant variable affecting Independent groups?

  Different abilities or characteristics of participants
• What is an advantage of Independent group designs regarding order effects?

  Avoids order effects like practice effect
• How does Independent group designs reduce guessing?

  Reduces chance of guessing experiment purpose