RELIABILITY, VALIDITY AND ACCURACY
ILTO provides high quality tests, psychometrically audited by a third party, to ensure that the results of test takers are accurate and reliable, assisting in the analysis of the English Proficiency in the organization.
Item Response Theory
High quality items discriminate candidates based on English Skills
Standard Error of Measurment
Performance weight of each of the 4 sections
The Conditional Standard Error of Measurement (CSEM) Function of the TECS was 0.181 meaning that it is extremely accurate. It serves the purpose of the test to more accurately measure candidates
The test shows a typical bell-shaped curve, evidence of the standardization of the test and assessment across different English level proficiency.
Each of the sections also display a bell-shaped curve of similar proportions, which suggests unidimensionality. It also suggests that the scaled scoring could be applied to each, with standardized interpretations.