  You can find defenses of various versions of judgment internalism which support somewhat different but still necessary connections between accepting or uttering a moral judgment on the one hand and being motivated on the other. One version makes the connection very tight – if one accepts a judgment one is motivated to do what it says we ought to do. Others are looser, requiring motivation only in rational persons (Korsgaard 1986; Smith 1994, 61) or perhaps in normal members of a community (Dreier 1990; Horgan &amp; Timmons 1992; 164–5). Depending on which version a theorist defends, different versions of non-cognitivism can explain the necessity of the connection, although not all versions can be easily explained using non-cognitivist resources. The tightest connection which requires motivation in anyone who accepts the judgment that some action is right is rather well explained by a very simple version of emotivism on which a judgment that some action is right conventionally expresses one’s approval of that action. One can only sincerely use that expression when one has the attitude just as one can only sincerely cheer for some team or person if one has a positive attitude towards them. Sincere utterance requires motivation, that’s part and parcel of this sort of emotivist theory.