validity

reliablity

quantitative

qualitative

research device

sampling

primary data

secondary data

closed questions

open questions

pilot study

research population

interviews

structured interviews

unstructured interviews

semi structured interviews

focus group

interviewer bias

social desirability

fully non participant

fully participant

covert observation

overt observation

objectivity

case study

longitudinal study

content analysis

operationalise

bias

personal documents

mass media documents

historical documents

sample

sample frame

random sample

stratified sample

systematic sample

snowball sample

cross sectional

generalisations

representative

triangulation

exaggeration

distortion

selection

fit for purpose