|Indicator 10: Disproportionality - Eligibility Category – Percent of districts with disproportionate representation of racial and ethnic groups in specific disability categories that is the result of inappropriate identification.
Data Source: NJSMART (Collection Dates: November 2008, October 2009, October 2010)
NJOSEP defined disproportionate representation from both a functional and statistical perspective.
Functional Definition: Implementation of policies, procedures, and practices in the general education instructional, behavioral, and intervention process and/or the special education identification, referral, evaluation, or eligibility determination process that results in a systemic, pervasive, persistent pattern of inappropriate over-identification/under-identification of students with disabilities of a specific racial/ethnic group as eligible for special education and related services or in a specific eligibility category.
Statistical Definition - NJOSE used multiple measures to statistically determine disproportionate representation. The measures included three descriptive statistics: unweighted risk ratio; risk rate comparison; and a measure of impact comparing expected vs. observed numbers of students identified as eligible for special education. The measures also included a statistical test of significance - chi square.
Districts were ranked on each of the three measures for a three year period (2008-2009 , 2009-2010, and 2010-2011). For the purpose of identifying districts with disproportionate representation (over-representation/under-representation) of racial/ethnic groups in specific disability categories, NJOSE:
Districts in which the impact was greater than 10 students were identified as having a “disproportionate representation” of racial and ethnic groups in specific disability categories.
The procedure used one statistical test of significance and one statistical procedure.
The steps followed in the analysis: