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Validity

Validity refers to a test's ability to measure what it is supposed to measure

Internal Validity

External Validity

Temporal Validity

The test measures what is supposed to be measuring control of EV's

Which the findings can be generalised

Relevent in today's society

Improve validity

Lab experiments

Randomisation

Standardisation

2 Types

Ecological

Population

Improve ecological

Field experiments

Natural experiment

Improve Population

Stratified sampling

Random sampling

Improve Temporal

Repeat the study

Assessing Validity

Concurrent-Agreement

Face-Genuinely measuring what is supposed to be