Just how accurate are tests like CELF and Renfrew picture action test? I feel that they are not really very well placed to look at the semantic/pragmatic side of things, as they are not exactly a genuine conversation are they? I'm particularly concerned because DS is now hitting normal range in CELF and Renfrew, but I definitely feel he is still delayed - his sentence length is OK, but range of vocab is somewhat limited, and ability to respond conversationally is really not like others his age.