Psychology

• What are investigator effects ?

  when participants performances could be affected by characteristics and or the behaviours of the investigator
• What are participant variables ?

  when participants performance could be affected by individual differences
• What’s order effects ?

  when participants complete multiple conditions and so their performance could be affected
• What have low risks of order effects ?

  Independent groups design

  matched pairs design
• What has high risks of order effects ?

  repeated measures design
• What has low risk of participant variables ?

  repeated measures design
• what has high risk of participant variables ?

  independent groups design