“…Three studies met eight criteria (Stubbs et al, 2004;Haw et al, 2005Haw et al, , 2007, and one each met ten (Rothschild et al, 2007), nine (Stubbs et al, 2006), seven (Ito and Yamazumi, 2003), six (Nirodi and Mitchell, 2002) and five criteria (Maidment and Thorn, 2005). The studies most frequently failed on validity measures (n ¼ 6) and error categories defined (n ¼ 5) criteria.…”