The pragmatic listener L 0 is then defined in terms of this literal agent and a prior P (w) over possible images: The pragmatic speaker S 1 is then defined in terms of this pragmatic listener, with the addition of a rationality parameter ↵ > 0 governing how much it takes into account the L 0 distribution when choosing utterances.
in our incremental RSA, speaker models take both a target image and a partial caption pc.