Experimental design

• Independant measures is where each participant takes part in only one condition allocated randomly to either the experimental or control group
• Positives of independant measures:

  Less materials needed

  No order effects

  Less chance of demand characteristics
• Negatives of independant measures:

  More participants needed

  Individual differnces
• Matched pairs is where different participants are used fro each condition, however they are matched based on variables such as age, gender, and so on which they are pre-tested on.
• Positives of matched pairs:

  Less chance of individual differnces

  No order effects

  Less chance of demand charcteristics
• Negatives of matched pairs:

  Matching is difficult

  More pariticipants needed

  Time consuming
• Repeated measures are where each participant takes part in both conditions and their perfomace is compared
• Positives of repeated measures:

  Less participants needed

  Removes individual differences
• Negatives of repeated measures:

  More materials needed

  Order effects