Can you explain a bit more why you added emphasis to "about whom" in the clause you quoted? I don't see how those two words create any kind of exception; this research gathered information about how the humans behaved in response to the requests and threats.
Are you accidentally reading an "is" into that clause to interpret it as "about whom an investigator is conducting research"? What matters is not whether the researcher considers the human to be the target of the research, but whether the human (or their privacy) is actually affected by the research.
Are you accidentally reading an "is" into that clause to interpret it as "about whom an investigator is conducting research"? What matters is not whether the researcher considers the human to be the target of the research, but whether the human (or their privacy) is actually affected by the research.