Source
Voigt (2022), LIT-1976, pp. 1–4; read in NOTE-1517.
What was actually shown
Nothing new was measured. The article assembles:
- From the author’s 2019 study: fixation duration on an item during a hard choice “was predictive of its choice and, importantly, its subsequent change in value (when controlling for choice)”; dlPFC and precuneus activity “was linked with online, trial-by-trial updates of preferences”; only remembered choices produced lasting change, with hippocampus activity (pp. 2–3).
- From others: gaze “plays a causal role in value-guided choice” (Shimojo et al. 2003; Glaholt et al. 2009); dACC activity with decision conflict; dlPFC in working memory and top-down spatial attention, precuneus in “early bottom-up selection of spatial attention” (p. 2).
- The synthesis: precuneus “allocates spatial attention to the salient stimulus (i.e., bottom up) and forwards this information to the dlPFC” (p. 3), after which the decision “has transferred from a hard to a (relatively) easy one” (p. 3).
Each step could have come out otherwise: preference change could have been purely post-decisional, or unrelated to fixation once choice is controlled.
What this does not say
- That attention causes the value update. Within the article the link is correlational; the causal role of gaze is borrowed from studies of ordinary, not tied, choices.
- That the tie is broken top-down. The model’s attentional step is bottom-up capture by the salient item; dlPFC holds what precuneus selected. It gives no support to dlPFC feedback as a marker of a non-salience-driven “fluid interest” (THEORY-1341).
- That an agent or subject resolves the tie. Voigt’s conclusion is that preferences “might be emergent consequences from the particulars of the decision scenario itself and brain networks” (p. 4).