I tested at the beginning of the year, when can I test again?
The shortest test-retest interval that will not result in significant practice effects on CELF–4 has not been determined; further research in this area is needed to answer this question. A test-retest study used an interval of 1 to 5 weeks between test administrations. The results indicated that composite scores increased by 4 points on average for the overall sample. See chapter 7 in the Examiner’s Manual for a report of this study.