Сертификат действителен

The Yapp English Level Test (version 3) is a computer-adaptive test (CAT) of grammar, vocabulary, comprehension and reading, including short texts and visual materials, with items from CEFR level A2 to C2. It was designed using expanded evidence-centred design (e-ECD). After each answer, ability is re-estimated with a three-parameter item response theory (IRT) model, and the next item is selected to be most informative for that candidate, subject to a content blueprint. The test ends after 15–30 items or at the 60-minute time limit. The CEFR level is derived from the ability estimate using cut scores; Yapp Score is the same estimate on a 0–100 scale. Item parameters are provisional expert estimates and are recalibrated as response data accumulate. The test does not assess listening, speaking or writing. Level descriptions follow the CEFR scale. This certificate is not a government-issued document.