講演・口頭発表等

国際会議
2018年11月15日

Influence of cognitive resource allocation on the attraction effect in multi-alternative decision making: An experimental study using a dual-task paradigm

The 59th Annual Meeting of the Psychonomic Society
  • Takashi Tsuzuki
  • ,
  • Yuji Takeda
  • ,
  • Itsuki Chiba

記述言語
英語
会議種別
ポスター発表
主催者
The Psychonomic Society
開催地
New Orleans, USA

Studies of the attraction effect usually utilize a three-alternative (target, competitor, and decoy) decision-making task in which each alternative has two attributes (Tsuzuki & Busemeyer, 2012; Tsuzuki & Guo, 2004). When the decoy attributes are slightly inferior to those of the target, the choice probability of the target increases compared to that of the competitor. The attraction effect in multi-alternative decision making reflects the context-dependent violation of axioms that are considered fundamental to rational choice. This effect is believed to depend on relatively effortless and intuitive processing (System 1 of the dual-process theory) rather than on effortful and elaborative processing (System 2). In our previous study (Tsuzuki, Takeda, & Chiba, 2016) that investigated the relationship between cognitive resources and the attraction effect in detail, we used a task-irrelevant probe technique (Takeda & Kimura, 2014) and measured the electroencephalographic (EEG) responses to the probes. We found that the mean N1 amplitudes of the event-related potentials (ERPs) elicited by the auditory probes were significantly larger when participants chose the target than when they chose the competitor. In this study, to confirm the a priori assumption of the previous experiment, we performed an additional experiment without measuring ERPs to examine the competition between a visual three-alternative decision-making task and an auditory oddball task (i.e., the detection of a target). We examined whether or not the choice proportion of the target (i.e., the strength of the attraction effect) was influenced by performing an auditory oddball task. Because the auditory oddball task should consume the cognitive resources, it was predicted that the attraction effect would increase when the participants performed the visual decision-making task concurrently with the auditory oddball task compared with when the participants performed only the visual decision-making task and ignored the auditory stimuli.