PSYB01H3 Lecture Notes - Lecture 7: Intravenous Therapy, Repeated Measures Design, Methodological Advisor
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Who to use as participants and how many. Checks to make sure you"re manipulation of the i. v. worked the way you wanted it to. Best choice is to use a random sample selected from the population of interest. But most of the time this is not what is done: convenience. Usually undergraduates at whatever university the study is being conducted at. However online/internet allows for people from general public from various backgrounds/ages/etc. are now used: snowball. You ask your friend to ask some of their friends and etc. etc. It"s a really easy thing to do especially over e-mail can simply forward the study. Used a lot of times in the early stages of research: internet-based. Good source of participants but less control over who is going to be filling the surveys out. Can get a broader range of participants.
