a1b1c1d1
A1B1C1D1 is a notation system used primarily in adaptive testing, particularly in the field of computer-based testing. This system is used to identify or reference specific items within a test or assessment. The four-character code is composed of one-digit letters, each of which serves a distinct purpose.
The letters "A," "B," "C," and "D" represent different categories or types of items being tested. These
Each set of letters is followed by a numerical subscript, starting from 1. This number indicates the
The A1B1C1D1 notation system is extensively used in large-scale computer-based testing platforms, such as the Educational
Due to its widespread adoption in educational and psychological testing, the A1B1C1D1 notation system has become