TY  - JOUR
PY  - 2019//
TI  - The formation of preference in risky choice
JO  - PLoS computational biology
A1  - Glickman, Moshe
A1  - Sharoni, Orian
A1  - Levy, Dino J.
A1  - Niebur, Ernst
A1  - Stuphorn, Veit
A1  - Usher, Marius
SP  - e1007201
EP  - e1007201
VL  - 15
IS  - 8
N2  - A key question in decision-making is how people integrate amounts and probabilities to form preferences between risky alternatives. Here we rely on the general principle of integration-to-boundary to develop several biologically plausible process models of risky-choice, which account for both choices and response-times. These models allowed us to contrast two influential competing theories: i) within-alternative evaluations, based on multiplicative interaction between amounts and probabilities, ii) within-attribute comparisons across alternatives. To constrain the preference formation process, we monitored eye-fixations during decisions between pairs of simple lotteries, designed to systematically span the decision-space. The behavioral results indicate that the participants' eye-scanning patterns were associated with risk-preferences and expected-value maximization. Crucially, model comparisons showed that within-alternative process models decisively outperformed within-attribute ones, in accounting for choices and response-times. These findings elucidate the psychological processes underlying preference formation when making risky-choices, and suggest that compensatory, within-alternative integration is an adaptive mechanism employed in human decision-making.<p />  <p>Language: en</p>
LA  - en
SN  - 1553-734X
UR  - http://dx.doi.org/10.1371/journal.pcbi.1007201
ID  - ref1
ER  -