They cover several theories, including: impression formation (Asch, 1946), cue utilization (Slovic & Lichtenstein, 1971), information integration (Anderson, 1970), multiple cue learning (Brunswik, 1955; Hammond & Summers, 1972), attribution (Heider,1958; Kelley, 1973), and the subjective probability model of Wyer and Goldberg (1970).