EVALUATION

• STRENGTHS OF REPEATED MEASURES DESIGNS?

  • no participant variables
  • most cost effective
• WHY ARE REPEATED MEASURES DESIGN THE MOST COST EFFECTIVE?

  only half the number of participants are required
• WEAKNESSES OF REPEATED MEASURES DESIGN?

  • order effects
  • demand characteristics
  • takes twice as long
• WHY DO REPEATED MEASURES DESIGNS TAKE TWICE AS LONG?

  only one condition can occur at a time
• HOW TO DEAL WITH ORDER EFFECTS IN REPEATED MEASURES DESIGN?

  counterbalancing
• HOW TO DEAL WITH DEMAND CHARACTERISTICS IN REPEATED MEASURES DESIGN?

  deception