TExES Educational Diagnostician (253) Practice Exam

Disproportionality in special education is about representation: whether a group is over- or under-represented in special education compared with its share of students in the general population. When a group appears in special education at a higher rate than it appears in the overall student body, or at a lower rate, that signals a mismatch that may reflect biases or systemic factors in referrals, evaluations, or access to services. For example, if a group makes up 15% of the student population but accounts for 30% of students in special education, that indicates disproportionality and prompts examination of practices that affect placement, not just the distribution of services or procedures. The other ideas don’t define disproportionality: equal distribution across groups would mean no disproportionality; disparities only in non-clinical settings miss the core issue of who ends up in services; and identical identification procedures don’t address the observed differences in outcomes.