Identifying methods, observations, interviews, correlational studies, and case studies

Paper 3 HL Psychology

true experiments

• manipulate the IV to see the affect on the DV

• control variables, strong internal validity

Quasi-experiments

• Like a lab experiment but can’t randomly allocate participants.

• high uncontrolled variables. lack internal validity

Natural experiment

• IV can change since it’s naturally occuring

• Extraneous factors are present and lack internal validity

Field experiment

• Tested in the real world

• Natural behaviour; participants are unaware

• decrease internal validity

Naturalistic observation: convert

• no manipulation of the study

• data collected in a natural environment

• participants are unaware of the observer