【主题】Attention Theory, Soft and Hard
【报告人】Soo Hong CHEW（终身荣誉教授，新加坡国立大学）
【时间】2023年5月24日周三13:30-15:00
【地点】亚搏手机版APP下载701会议室
【语言】英文
【摘要】The human brain, consuming a mere 10 watts, is miserly in minimizing energy expenditure constantly and unconsciously, giving rise to a volatile and context-sensitive attentional process. This talk builds on both soft modeling based on revealed choice and hard modeling which seeks additionally biological accuracy. In the soft attention theory (SAT), the generally varying utility of a lottery emerges from potentially volatile decision weights. In binary choice, SAT always exhibits EU-conforming behavior in the correlated Allais common-consequence problem if and only if attention is symmetric, which coincides formally with Regret Theory and Salience Theory. We further offer a hard attention theory (HAT) through a quartet of neurotransmitters – dopamine (DA), serotonin (5HT), acetylcholine (ACh), and norepinephrine (NE). Building on the application of DA and 5HT tones to model the loss-gain differentiation in risk attitude (Zhong et al., 2009), we hypothesize that ACh and NE tones modulate respectively the top-down and bottom-up components of the attention function in SAT. This yields predictions which are tested in a preregistered placebo-controlled RCT experiment using nicotine (ACh agonist) and Ventolin (NE agonist) to manipulate top-down attention and bottom-up salience. Preliminary findings will be discussed.