Full Idea
By stressing the intimate connection between moral judgements and the agent's non-cognitive attitudes, emotivists claim to capture the motivational properties of moral judgement.
Gist of Idea
Emotivists claim to explain moral motivation by basing morality on non-cognitive attitudes
Source
David O. Brink (Emotivism [1995], p.223)
Book Reference
'Cambridge Dictionary of Philosophy', ed/tr. Audi,Robert [CUP 1995], p.223
A Reaction
The same claim is made by contractarians, who start from our universal self-interest. Emotivists also nicely capture the motivation properties of immoral judgements.