&gt; 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 &quot;highly likely that the National Crime Victimization Survey (NCVS) is underestimating rape and sexual assault.&quot;[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.