Science Buddies: "Ask an Expert"

https://www.sciencebuddies.org/science- ... suggestion
I am trying to conduct this experiment for a 2-week experimental project assigned to me in class. I wanted to know how many images of the individuals it would be best to have? Thank you!

Hi there!

Thank you for your question!

This Science Buddies project is based on the following project abstract: https://csef.usc.edu/History/2002/Projects/J1706.pdf. Unfortunately, it does not list a specific number of images – however, I personally would recommend a number between the range of 15 and 25. 5 minutes is quite a lot of time for the test subjects to observe the images, so I would recommend using a decent quantity of images for them to study.

Thanks!