Focus Group , group discussion held by a trained facilitator Advantages:Better than indiv interviews, more complex pool of data
Disadvantages:May bring up minority views, Certain people may dominate discussions, Bias of group and interviewer,

Manipulation of the IV and observation of the DV Advantages:Allows for a causal explanation between the variables, replication is possible, limits extraneous variables
Disadvantages:Might not apply to the real world, a sample might not represent the entire population, variables cannot be controlled

Natural Observation of the IV, Observation of a behaviour in a natural setting
Advantages:Allows study of complex subjects
Disadvantages :Cannot be replicated, observer bias,

Quasi Experimental, Unlike experiment it has no random allocation and no control group Advantages:More convenient, unethical research possible, evidence for casual explanation Disadvantages

Delphi Technique Questionnaire sent to experts Advantages Ability to draw expertise from across the globe, free expression of opinion Disadvantages:Contamination of results through researcher bias, non-responses can limit data quality, small sample size

Physiological, measures of heart rate or scores on IQ tests Advantages:The use of precise measurements Disadvantages:Bias may influence results