|Indicator 9: Disproportionality - Child with a Disability - Percent of districts with disproportionate representation of racial and ethnic groups in special education and related services that is the result of inappropriate identification.
Data Source: NJSMART (Collections 2008, 2009, 2010) and Fall Surveys (October 2008, October 2009, October 2010)
NJOSE 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.
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, 2010-2011). Ranks for the three year period were totaled and those districts with the lowest ranks (i.e., ranks of 1 to 50) were targeted for a review of policies, procedures and practices of factors that may be contributing to disproportionate representation that is the result of inappropriate identification.
Risk Ratio: Risk Ratio answers the question – What is a specific racial/ethnic group’s risk of receiving special education and related services compared to the risk for all other students?
Risk Rate Comparison: Risk Rate Comparison answers the question – What is the difference between the classification rates of specific racial/ethnic group of students compared to all other students?
Impact:Impact Calculation answers the question – How large was the impact on a particular racial/ethnic group?