“…Even when using the same instrument, the number of items used to measure elder abuse and its subtypes varied. For instance, Yan measured verbal abuse using an 8-item subscale from 2001 to 2004 (Yan & Tang, 2001, but shortened the scale to 6 items in 2011 (Yan & Kwok, 2011). There is also a discrepancy between time periods when recalling elder abuse among these studies, which included "lifetime" (Chan, Brownridge, Tiwari, Fong, & Leung, 2008;Shibusawa & Yick, 2007), "since 60 years or older" (Dong, 2014a;Dong, Chen, et al, 2014), "since 55 years old" (Lai, 2011), "in the past year" (Wu et al, 2012;Yan & Tang, 2001, "within past month" (Yan, 2014a;Yan & Kwok, 2011), or an omission of timeframe (Wang, 2006).…”