Validity

• Internal validity - Is the experiment measuring what it aimed to measure.
• High control = high internal validity
• External Validity - Can results be generalised to outside of the experiment.
• Laboratory experiment = high internal validity
• Natural experiment = High external validity
• Ecological validity - Does the situation represent /correlate with what would happen in real life.
• Temporal validity - Does the time period in which the research was carried out affect findings.
• Population validity - Does the sample reflect the population. Is there a mix of ages, cultures, genders.