Do you ever loop your boss when having a conversation with a colleague when his or her presence in the thread wasn't really necessary? Turns out, many people do this, and your colleague doesn't find it helpful at all. From an article: My collaborators and I conducted a series of six studies (a combination of experiments and surveys) to see how cc'ing influences organizational trust. While our findings are preliminary and our academic paper is still under review, a first important finding was that the more often you include a supervisor on emails to coworkers, the less trusted those coworkers feel (alternative link). In our experimental studies, in which 594 working adults participated, people read a scenario where they had to imagine that their coworker always, sometimes, or almost never copied the supervisor when emailing them. Participants were then required to respond to items assessing how trusted they would feel by their colleague. ("In this work situation, I would feel that my colleague would trust my 'competence,' 'integrity,' and 'benevolence.'") It was consistently shown that the condition in which the supervisor was "always" included by cc made the recipient of the email feel trusted significantly less than recipients who were randomly allocated to the "sometimes" or "almost never" condition. Organizational surveys of 345 employees replicated this effect by demonstrating that the more often employees perceived that a coworker copied their supervisor, the less they felt trusted by that coworker. To make matters worse, my findings indicated that when the supervisor was copied in often, employees felt less trusted, and this feeling automatically led them to infer that the organizational culture must be low in trust overall, fostering a culture of fear and low psychological safety.