Comic for Psych 321
Storyboard Text
- Slide: 1
- Uncle Tom, I need you to fill out this survey for my study. Once your finished, perhaps you can send the link to all your friends, so they can complete it as well.
- Slide: 2
- Wouldn't that be considered snowball sampling? This is a form of non-probability sampling. since you're asking me to recruit my acquaintances for your study, ultimately undermining the process of randomly selecting participants. Perhaps, my friends are not representative of the population of interest. Have you learned about probability sampling?
- You make a good point. What is probability sampling and how do you recommend I recruit participants using this method?
- Slide: 3
- Probability sampling is when each participant has an equal chance of being selected for your sample. The easiest way to do this is through simple random sampling. I can give you a list of all 20 of my friends, and you can choose five of the participants for your sample. To eliminate bias, I recommend assigning each name a number and using a random number generator to pick which friends will represent your sample. Best of luck with your recruitment process!
- Thanks for your help, Uncle Tom!
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