experiments

Cards (14)

  • types of experiments:
    lab
    quasi
    natural
    field
  • lab experiments:
    -controlled environment
    -measured DV
    -manipulated IV
    -standardised
  • lab experiments
    strengths:
    control
    reliability
    weakness:
    ecological validity
  • field experiments:
    natural environment
    manipulated IV
    measured DV
    some EV’s controlled
  • field experiment
    strengths:
    ecological validity
    reduced demand characteristics
    weakness:
    control
  • quasi experiment
    controlled environment
    pre-existing IV
    measured DV
    standardised
  • quasi experiment
    strength:
    high reliability
    weakness:
    confounding variables
  • natural experiment:
    natural environment
    no control
    IV manipulated
    DV measured
  • natural experiment
    strengths:
    ecological validity
    reduced demand characteristics
    weakness:
    control
  • the experimental designs are:
    independent groups
    repeated measures
    matched pairs
  • independent groups:
    different people in each condition
    strengths:
    no order effects
    reduced demand characteristics
    weakness:
    individual differences
  • repeated measures: same people in both conditions
    strength:
    less individual differences
    weaknesses:
    more demand characteristics
    order effects
    HOWEVER
    order effects can be eliminated with counterbalancing (ABBA)
  • matched pairs:
    pre test
    match participants with similar scores
    randomly allocate to conditions
    compare the pairs’ results
  • matched pairs
    strengths:
    less individual differences
    reduced order effects and demand characteristics
    weakness:
    individual differences