demand characteristics and investigator effects

• Demand Characteristics (why do they occur?)


  Demand variable occur because the participants guess the aim of the study. Either from the situation of the experiments or their surroundings
• Investigator effects (Why do they occur?)


  The investigator Drops clues about the aim of the study either consciously or unconsciously. Any unwanted influence from the investigator on the research
• Demand characteristics (How do they influence participants behaviour?)


  The participants will either try to sabotage the experiment( the screw u effect) or ( please U effect) were they act how they believe the researcher wants them to act, what the study is looking for. It is unnatural behaviour
• Investigator effects (How do they influence participant behaviour?)


  They might be convincing the participants their actions are correct and causing unnatural behaviour. Also may cause bias
• Demand characteristics (How can they be controlled?)

  They can be controlled by having a single blind study
• Investigate effects (How can they be controlled?)

  Having a double blind study