research methods key words

control groups

cluster sample

closed questions

covert

dependant variable

extraneous variable

experiment

experimental group

field experiment

generalisations

independent variable

interpretivism

informed consent

laboratory experiment

objective

open questions

overt

postal questionnaire

participant observation

quantitative

quota sample

qualitative

questionnaire

reliable

right to withdraw

random sample

representative

selective bias

stratified sample

sample frame

sample

snowball sample

structured interview

variable

validity