> owever, results reported by the NCVS are consistently lower than studies using other methodologies, and researchers have charged that the question wording, co

> owever, results reported by the NCVS are consistently lower than studies using other methodologies, and researchers have charged that the question wording, context, and sampling methodology used on the NCVS leads a systematic underestimate of the incidence of rape and sexual assault.[5][14][15] A recent assessment of the NCVS methodology conducted by the National Research Council pointed to four flaws in the NCSV approach: the use of a sampling methodology that was inefficient in measuring low-incidence events like rape and sexual assault; the ambiguous wording questions related to sexual violence; the criminal justice definitions of assault; and the lack of privacy offered to survey respondents (phone interview vs. completely anonymous survey). The authors concluded that these flaws make it "highly likely that the National Crime Victimization Survey (NCVS) is underestimating rape and sexual assault."[5] The NCVS also differs from other studies by including off campus students among its statistics. Since the risk of assault is higher for students living on campus, the 0.6% reported assault rate is lower than rates reported for campus environments.