This is when everyone has an equal chance of being selected
Systematic sampling
choosing randomly from a list
Stratified sampling
to make the sample as a representative as possible the sample frame will be divided into a number of smaller groups such as a social class, age, gender etc. Individuals are then drawn at random from these groups.
snowball sampling
This is when you ask your participants to recommend other participants
Opportunity sampling
Where most convenient or suitable persons are picked
quota sampling
interviews must question an exact quota of people from categories such as females, teenagers, in proportion to numbers in the wider population
