Answer:
The correct answer for the exercise: A researcher wants to observe preschoolers at a local public playground to evaluate levels of cooperation. The researcher will not interact with the children or record information in such a manner that the identity of the subjects can be readily ascertained. is: This research won't require IRB review because it would be eligeble for exemption since the researcher is not interacting with the children and the playground is set in a public setting.
Step-by-step explanation:
Ok, this question is very difficult, but I am going to do my best to answer it: First of all, let's analyze it. The researcher is conducting research based on scientific observation and operational description. This means that the researcher is going to watch the behavior of his population in the natural environment he wants to study them and without having more action than pure observation. He also will use this information to record the behavior of a certain topic "cooperation". He is not going to control anything and he will observe what the population does. So, because is making a field observation without any variable control or personal intervention. He doesn´t require an institutional review board review for his study, because it is not biased. Unless he doesn't know how to perform operational description.