Assessment and Progress Monitoring · 3 min read
Foundations of Assessment in Special Education
Assessment in special education serves multiple purposes: identification of disabilities, determination of eligibility for services, development of individualized education programs, instructional planning, and measurement of student progress. Understanding assessment principles is fundamental to effective special education practice.
Purpose and Types of Assessment
Assessment in special education occurs at multiple levels and serves distinct functions. Screening assessments identify students who may be at risk for learning difficulties and require further evaluation. These brief, efficient measures are administered to large groups and help determine which students need more comprehensive assessment.
Diagnostic assessments provide in-depth information about a student's specific strengths and weaknesses. These assessments help identify the nature and extent of a disability and inform intervention planning. Diagnostic assessments are typically administered individually by trained professionals and may include standardized tests, observations, and interviews.
Progress monitoring assessments track student learning over time and evaluate the effectiveness of instruction. These frequent, brief measures provide ongoing data that inform instructional decisions. Curriculum-based measurement is a common progress monitoring approach that uses standardized procedures to assess student performance on grade-level academic tasks.
Outcome assessments evaluate student achievement at the end of an instructional period. These summative measures determine whether students have met learning objectives and may include state assessments, end-of-unit tests, and annual achievement tests.
Formal and Informal Assessment
Formal assessments are standardized measures administered and scored according to specific procedures. These assessments have established reliability and validity and produce scores that can be compared to normative data. Examples include intelligence tests, achievement tests, and standardized behavior rating scales.
Informal assessments are non-standardized measures that provide information about student performance in authentic contexts. These assessments are flexible and can be adapted to individual student needs. Examples include curriculum-based assessments, work samples, observations, interviews, and teacher-made tests.
Both formal and informal assessments contribute valuable information to the assessment process. Formal assessments provide standardized data for eligibility determination and comparison to peers. Informal assessments provide contextualized information about how students perform in classroom settings and respond to instruction.
Norm-Referenced and Criterion-Referenced Assessment
Norm-referenced assessments compare an individual student's performance to the performance of a normative sample. These assessments yield scores such as percentile ranks, standard scores, and grade equivalents that indicate how a student performs relative to same-age or same-grade peers. Norm-referenced assessments are useful for eligibility determination and identifying students who perform significantly below expectations.
Criterion-referenced assessments measure student performance against predetermined criteria or standards. These assessments indicate what a student knows and can do relative to specific learning objectives. Criterion-referenced assessments are useful for instructional planning and monitoring progress toward mastery of specific skills.
Reliability and Validity
Reliability refers to the consistency of assessment results. A reliable assessment produces similar results across different administrations, raters, or items. Types of reliability include test-retest reliability, inter-rater reliability, and internal consistency. When selecting assessments, educators should consider reliability coefficients and standard error of measurement.
Validity refers to the extent to which an assessment measures what it is intended to measure. Content validity indicates whether assessment items adequately represent the domain being measured. Criterion validity indicates whether assessment results correlate with other measures of the same construct. Construct validity indicates whether the assessment measures the theoretical construct it claims to measure.
Assessment Bias and Fairness
Assessment bias occurs when assessment results systematically over- or under-estimate the abilities of particular groups. Sources of bias include cultural bias in test content, linguistic bias for English learners, and format bias that disadvantages students with certain disabilities.
Fair assessment practices require consideration of student characteristics and provision of appropriate accommodations. Assessments should be selected based on their appropriateness for the individual student, and results should be interpreted in light of factors that may affect performance.
Finished reading?
Lock it in with a quick Assessment and Progress Monitoring quiz.