NPR ended the practice Aug. 30 of crediting the off-mike staff behind the scenes of its newsmagazines, citing evidence that the lists of names cue listeners to tune away. The network had been considering the change for some time, said Margaret Low Smith, senior v.p. of news. In addition, credits could not accommodate all staffers, so those named “ended up being a select slice of people,” Smith said. And stations aren’t always consistent in crediting their own staffs during the newsmagazines.