measures

• whats a repeated measure?


  all ppts undergo all of the conditions of the experiment
• strength of repeated measures


  ppts variables are removed

  fewer ppts are needed
• weakness of repeated measures?


  Order effects, ppts get practice so performance increases
• what are matching pairs


  ppts only take part in one condition

  split into 2 groups, these ppts are similar

  eg football ability would be matched
• what are the strengths of matching pairs


  no order effects as ppts only undergo one condition

  ppts are matched up
• what are the weaknesses of matched pairs


  takes time

  not always exact

  lots of effort for minimal gain