Sampling AO3

Question 1

evaluate random sampling

Answer 1

• potentially unbiased
• enhanced internal validity because confounding/extraneous variables are divided within the group
• difficult and time consuming
• may end up with it being unrepresentative

Question 2

evaluate systematic sampling

Answer 2

• is objective
• researcher has no influence as to who is chosen
• time consuming
• participants may refuse to take part in the end, resulting in a volunteer sample

Question 3

evaluate opportunity sample

Answer 3

• convenient
• much less costly
• suffer from 2 forms of bias; the sample is unrepresentative of the target population as it’s drawn from a very specific behaviour. The researcher also has complete control over the selection of participants and therefore may avoid people they don’t like the look of (researcher bias).

Question 4

evaluate volunteer samples

Answer 4

• easy
• requires minimal input
• less time consuming
• volunteers may be more engaged
• volunteer bias- may attract a certain kind of profile who is curious and wants to please the researcher which may affect how research can be generalised