experimental methods
Cards (12)
- what are the 4 types of experiment?
- laboratory experiment
- field experiment
- natural experiment
- quasi experiment
- laboratory experiments
- controlled conditions to minimise the effect of extraneous variables
- manipulates IV
- measures DV
- participants are aware
- field experiments
- natural conditions
- manipulates IV
- measures DV
- any location which isn't laboratory
- participants aren't aware they're taking part
- laboratory experiments AO3+in control of extraneous variables which allows for high validity-lack external validity - participants know they're being observed
- evaluating field experiments+high ecological validity due to natural setting compared to laboratory studies-less control over extraneous variables due to natural setting-unethical - can't give informed consent
- natural experiments
- natural conditions
- IV is naturally occurring (unemployment or earthquake)
- DV is measured
- behaviours are compared to beforehand or with a control group
- natural experiments AO3+high external validity - due to naturally occurring IV+high ecological validity - real life issues being studied rather than artificial-no control over extraneous variables
- quasi experiments
- controlled or natural conditions
- IV is a difference between people (age and gender)
- measures DV
- quasi experiments AO3+when they take place under laboratory settings, they have high ecological validity-participants can't be randomly allocated to conditions to remove bias in procedure-when they take place under natural conditions, there is no control over the environment
- comparison of experimental methods - ecological validity
- laboratory - low
- field - high
- natural - high
- quasi - low/high
- comparing experimental methods - extraneous variables
- laboratory - controlled
- field - uncontrolled
- natural - uncontrolled
- quasi - controlled/uncontrolled
- comparing experimental methods - replicability
- laboratory - high
- field - low
- natural - low
- qausi - high/low