“…For example, Grace and Weaven (2011) had a response rate of 9%, while Weaven, Grace, and Manning (2009) reported a response rate of 15%. Similarly, Cochet, Dormann, and Ehrmann (2008), Gillis, McEwan, Crook, and Michael (2011), and Gomez, Gonzalez, and Vazquez (2010) all reported response rate in the low 20s. As non-response bias was of concern, a sample of late responders (n = 55) were compared with the early responders.…”