Which of the example requires snowball sampling technique?

Key Points

• Snowball sampling technique is commonly used when the target population is difficult to reach or locate, and when the individuals in the population share a certain characteristic or trait that makes them hard to identify through traditional sampling methods. The technique involves starting with a small set of participants and then expanding the sample by asking those initial participants to refer other individuals who meet the criteria.

Based on this understanding, the example that would require snowball sampling technique is:

Non-heterosexual persons:

• Non-heterosexual individuals might be part of a population that is not easily identifiable or accessible through traditional sampling methods. Snowball sampling would be useful in reaching out to this population by starting with a few known non-heterosexual individuals and then asking them to refer other non-heterosexual persons they know.
• This technique allows for the recruitment of participants who might not be openly identifiable or listed in conventional sampling frames or directories.

Therefore option 2 is the correct answer.