“…Not surprisingly, employees soften (Ploeger, Kelley, & Bisel, 2011), obscure (Lucas & Fyke, 2013), or refrain from (Bisel & Kramer, 2014) voicing upward ethical dissent because of fear of retribution (Bisel & Arterburn, 2012) and potentially threatening powerful individuals’ public images (Bisel, Messersmith, & Kelley, 2012). Studies of the mum effect —or individuals’ reluctance to provide negative feedback to one another for fear of damaging relationships—have a long history in interpersonal research (see Dibble & Levine, 2010).…”