Psychology

• Laboratory experiments

  • Highly controlled experiment
  • Carry out in a lab
  • Artificial environment of a university lab
• Field experiments

  • Experiment that carry out in the field
  • Natural environment
  • Such as street, school, at work
• Natural Experiment

  • Researcher take advantage the preexisting IV
  • IV have been manipulated naturally
• Quasi experiment

  • Researcher takes advantage of the pre-existing differences between people.
  • Gender, age
• Independent variable

  Manipulated by the experimenter

  IV is what caused the DV
• Dependent variable

  • Measured by the experimenter
• Directional Hypothesis (one tailed)

  • Know the direction of the experiment
• Non-directional hypothesis (two-tailed)

  • Dont know the direction
  • “there will be a significant difference ….
• Null hypothesis

  • IV have no effect on the DV
• Operationalize hypothesis

  • Operationalize the IV and DV
• Matched pair Design

  • 1 group with match characteristic
• Independent group design

  • Participant are put into separate groups randomly
• Repeated Measures design

  • Participant in every group
• Participant variables

  • Differences between the participant
• Situational variable

  • features of the experimental situation
• Experimenter variables

  • to do with how an experimenter may effect the experiment
• Extraneous variables

  • Can be controlled variable
• Confounding variables

  • Can not controlled variable