Abstract
This chapter examines the extent to which socioeconomic and racial demographics are related to special education disproportionality and in so doing adds to the existing research on the impact of segregation and desegregation on student outcomes. Using district-level special education classification data, student racial demographic data, community socioeconomic data, and student academic achievement data, regression models were structured to analyze the relationship between the socioeconomic and racial composition of a school district and the likelihood that Black students would be disproportionately classified as disabled. The analysis shows that as the percentage of Black students in a school district decreased, the likelihood that Black students would be disproportionately classified as disabled and the likelihood that Black students would be classified as disabled in general both increased. This demonstrates that racial demographic characteristics of a school district are related to the overrepresentation of Black students in special education.
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Notes
- 1.
Odds ratios comparing the classification rates of Black students to White students were used as measures of relative likelihoods.
- 2.
This is counter to Oswald et al.’s (1999) findings.
- 3.
Their model also examined school-level variables, showing that suspension–expulsion rates are correlated to disproportionality in ED classifications, dropout rates are negatively correlated to disproportionality in MoMR classifications and positively correlated to disproportionality in SL classifications, achievement levels are positively correlated to disproportionality in MMR classifications and negatively correlated to disproportionality in SL classifications, and student–teacher ratios were positively correlated with disproportionality in MMR classifications. Moreover, the study’s logistic regression demonstrates that race (the proportion of African American students) was a better predictor of disproportionality than poverty and that school suspensions and expulsions proved to be the most significant predictor of disproportionality.
- 4.
MacMillan and Reschly (1998) raised concerns about Oswald et al.’s (1999), Oswald et al.’s (2001), and Coutinho et al.’s (2002) use of data from the Office of Civil Rights, arguing that it oversamples from large urban districts, thus limiting the ability to generalize the findings to a national level.
- 5.
The contradictory nature of these findings may put into question the validity of the hypothesis of differential susceptibility.
- 6.
The following district enrollment criteria were used to construct the final dataset: (a) at least 75 students with disabilities enrolled; (b) a minimum of 30 Black students (disabled and nondisabled) enrolled; (c) at least 75 non-Black students (disabled and nondisabled) enrolled; and (d) at least 10 Black students with disabilities.
- 7.
Based on the 649 school districts in the original dataset for which there is enrollment data, these 263 school districts serve 71.6Â % of the total number of students enrolled in the entire dataset. Moreover, based on the 652 school districts in the original dataset for which there is special education enrollment data, these 262 school districts served 73.8Â % of the total number of students with disabilities enrolled in the entire dataset.
- 8.
Originally, the academic performance of students from several grade levels was considered for this analysis, but they proved to be highly correlated with each other.
- 9.
This is a point of departure from Skiba et al. (2005), which used Z-scores.
- 10.
Reporting relative risk ratios alone can pose a problem in that relative risk values are not comparable to each other. A relative risk of 2.0 in one case is not the same as relative risk of 2.0 in another due to proportions. For example, in school district A, 10Â % of Black students are classified as disabled, while 5Â % of non-Black students are classified as disabled. At the same time, in school district B, 30Â % of Black students are classified as disabled, while 15Â % on non-Black students are classified as disabled. In both school district A and B, Black students are twice as likely to be classified as disabled compared to all other students, but Black students in school district B are three times more likely to be classified as disabled compared to Black students in school district A. For this reason, this study also will use the risk index of Black student being classified as disabled.
- 11.
The risk that non-Black students have of being classified as disabled will be used as an independent variable in this model.
- 12.
\( {\text{RR}}_{\text{Black}} = \frac{{{\text{SWD}}_{\text{Black}} /({\text{SWD}}_{\text{Black}} + {\text{GEN}}_{\text{Black}} )}}{{{\text{SWD}}_{\text{Other}} /({\text{SWD}}_{\text{Other}} + {\text{GEN}}_{\text{Other}} )}} \).
- 13.
As such, in the descriptive statistics, both the relative risk of Black students being classified with a disability as well as the natural log transformed relative risk. When reporting inferential statistics, only the natural log transformed relative risk is reported (though for the sake of clarity in the writing, the natural log transformed relative risk will be referred to as the relative risk).
- 14.
\( {\text{RI}}_{\text{Black}} = {\text{SWD}}_{\text{Black}} /({\text{SWD}}_{\text{Black}} + {\text{GEN}}_{\text{Black}} ) \).
- 15.
The interrelationship between the descriptive variables helps define the regression model. The proportion of Black students and the concentration of poverty in a school district were moderately correlated. Skiba et al. (2005) do, however, note that poverty and race may operate differently with respect to disproportionality. Therefore, both variables were included in the regression model. There was a moderate positive correlation between the proportion of Black students in a school district and the overall district enrollment, and a strong negative correlation between the proportion of Black students in a school district and the average ELA achievement.
- 16.
There is a moderate negative correlation between the risk index of non-Black students and the relative risk of Black students being classified as disabled, r = 0.3333, n = 263, p < 0.0001. This correlation is tautological to the definition of relative risk—as the risk of non-Black students decreases, the relative risk of Black students increases.
- 17.
Based on the number of univariate outliers and the skew of the descriptive variable, the decision was made to transform the several descriptive variables to reduce the number of outliers and improve the normality and homoscedasticity of the residuals. Natural log transformations were used on the percent of Black and African American students enrolled in district, the percent of children ages 5 through 17 living in families below the poverty line in district (concentration of poverty), and the total district enrollment variables. One case with missing data was removed from the data, but none of the outliers were removed, NÂ =Â 262. This did not have any significant impact on the correlations between the variables.
- 18.
Similar to risk ratio analysis, based on the number of univariate outliers and the skew of the descriptive variables, the decision was made to transform the several descriptive variables to reduce the number of outliers and improve the normality and homoscedasticity of the residuals. Natural log transformations were used on the risk index of Black students being classified as disabled, the risk index of non-Black students being classified as disabled, the percent of Black and African American students enrolled in district, the percent of children ages 5 through 17 living in families below the poverty line in district (concentration of poverty), and the total district enrollment variables. In one case, missing data was removed, but none of the outliers were removed (NÂ =Â 262). This did not have any significant impact on the correlations between the variables.
- 19.
This not a percentage point increase, but rather a percent change of the proportions. For example, a change from 75Â % Black student enrollment to 65Â % may represent a 10-percentage point change in the Black student enrollment, but it also represents a 15Â % change in the Black student enrollment. The 1Â % point change in the text refers to this second method of looking a percentage change and not the first.
- 20.
It should be noted that the risk index of Black students classified as disabled is not correlated with concentration of poverty in a school district, while there is a moderate positive correlation between the risk index of non-Black students and the concentration of poverty.
- 21.
They found that districts with the lower concentrations of students of color reported higher special education classification rates, suggesting that additional research is needed to understand referral and classification processes in schools where fewer non-White students are enrolled.
- 22.
Thus, educational practitioners might argue that by receiving a special education classification students are afforded additional resources and services that they might not otherwise get. Moreover, it could be argued that special education services provide additional support to struggling students and the overrepresentation of Black students in special education is indicative of response to need—providing struggling Black students with the supports they need to be successful in schools. Researchers enjoying this perspective have argued that Black students are in fact underrepresented in special education—indicating that despite being disproportionately overrepresented in special education, their educational needs (as defined both by their academic performance and their socioeconomic status) is such that Black students require additional special education services (Hibel, Farkas, & Morgan, 2010, Morgan et al., 2015). In a sense, this line of research argues that Black students (as well as Native American students, Hispanic Students, and language minority students) should be more disproportionately classified as disabled because they have a greater educational need. If this is the case, significant attention should be placed on the quality of those special education services being offered—as noted above research suggests special education services may not be an effective means of supporting student (Donovan & Cross, 2002; Fierros & Conroy, 2002; Gottlieb & Alter, 1994; Harry & Klingner, 2006), and carry with it the negative externalities of stigmatization (Donovan & Cross, 2002; Gartner & Lipsky, 1999; Wagner et al. 2007) and permanence (Fierros & Conroy, 2002; Harry & Klingner, 2006).
- 23.
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Ahram, R. (2016). The Diversity of School and Community Contexts and Implications for Special Education Classifications. In: Noguera, P., Pierce, J., Ahram, R. (eds) Race, Equity, and Education. Springer, Cham. https://doi.org/10.1007/978-3-319-23772-5_13
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