Answer:
Analogue sample.
Explanation:
Analogue study is the type of research study in which the researchers experiment on the participants who resemble their hypothesis. These participants are not likely to be identical but similar to the situation.
In the given case, the people who volunteered and responded to the ad of the researcher for public speaking anxiety are a part of the analogue sampling.
They are not people who have anxiety but will volunteer to speak about it, resembling the hypothesis of researchers.
