Question

you are interested in the amount of time high school students spend talking to their peers during class breaks. you want to determine whether girls are more talkative with other girls than they are with boys. you set up a camera to record a hundred such interactions and you watch the results. which type of study is this?
experiment
survey
naturalistic observation
case study

Explanation:

Naturalistic observation involves observing subjects in their natural, unaltered environment without manipulating variables. Here, students are observed during normal class breaks with no intervention, matching this study type. An experiment requires variable manipulation, a survey uses self-reported data, and a case study focuses on a single/limited small group, which do not fit.

Answer:

naturalistic observation