Can I use a rating period of less than the specified 2 or 6 months? How often can I readminister a form?

If you plan to readminister forms over shorter intervals than the specified 2-month (for CBCL/1½-5, C-TRF/1½-5, or TRF) or 6-month (for CBCL/6-18, ABCL, ASR, or YSR) rating period, you may instruct respondents to base their ratings on shorter periods. However, the readministrations should be spaced over long enough intervals to allow behavioral changes to occur, stabilize, and become evident to respondents.