每个WJ IV电池都包含一个“core” set of tests that provides a representative survey of abilities measured 通过 the battery. Examiners can selectively administer additional tests to provide greater breadth of 测量 in an area of 认识 or linguistic competency or in a domain of 成就. This Assessment Service Bulletin describes how to use the 四世 in a 核心-selective evaluation process (C-SEP) for identification of a specific 学习 disability (SLD). The basic premise of the C-SEP model for SLD identification is that test selection and data analysis are proportional to problem complexity—based on the presenting problem or referral question and the evaluator's professional judgment in determining what tests to administer . Information provided in this bulletin can be used to support professional judgment in determining what tests, beyond the 核心 tests, to administer in an evaluation. Test-to-cluster 相关性 tables support the 有效期 of the C-SEP as a data-based model for diagnostic decision making.