their risk assessment. Researchers and practitioners consider some factors as "static", in that they do not change with time, such as number of prior sex offenses, victim gender, and deviant sexual arousal, and some other factors as "dynamic", such as an offender's compliance with supervision and treatment. By examining both types of factors, a more complete picture of the offender's risk can emerge, compared with static or dynamic factors used alone. There is no single assessment tool that clinicians must use for assessing sexual recidivism risk, but there are tools that are widely used, such as the Static-99R. The Static-99R is the most popular actuarial scale in the United States. The Static-99R is a 10-item scale for ranking a sex offender’s relative risk of sexual recidivism compared other offenders. This scale is based on demographic and criminal history data, for example, age at release and number of prior sex offenses. Researchers have shown that the Static-99R is valid across a wide range of individuals (in terms of demographics, such as race/ethnicity). However, the Static-99R has only a modest ability to discriminate correctly between sex offenders and non sex offenders. This means that a randomly selected sex offender would be correctly classified as higher risk than a randomly selected non sex offender with "modest" accuracy. In addition, the Static-99R does not account for every factor that makes a sex offender more likely to reoffend. Despite these shortcomings, the Static-99R is arguably the highest quality tool, in terms of methodological rigor, that is widely available to clinicians to assess sex offender risk of recidivism. Post-incarceration registries and restrictions A sex offender registry is a system in place in a number of jurisdictions designed to allow authorities to keep track of the residence and activity of sex offenders (including those released from prison). In some jurisdictions (especially in the United States), information in the registry is made available to the public via a website or other means. In many jurisdictions, registered sex offenders are subject to additional restrictions (including housing). Those on parole (or probation) may be subject to restrictions not applicable to other parolees or probationers. These include restrictions on being in the presence of minors, living in proximity to a school or daycare center, or owning toys (or other items of interest to minors). Israel's sex offender registry is accessible only to security officials, rather than to the general public. Megan's