Publications by authors named "Takashi Ideno"

We aimed to identify the ways in which coloring cells affected decision-making in the context of binary-colored multi-attribute tables, using eye movement data. In our black-white attribute tables, the value of attributes was limited to two (with a certain threshold for each attribute) and each cell of the table was colored either black or white on the white background. We compared the two natural ways of systematic color assignment: "quantitatively coherent" ways and "qualitatively coherent" ways (namely, the ways in which the black-white distinction represented the quantitative amount distinction, and the ways in which the black-white distinction represented the quality distinction).

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Article Synopsis
  • Everyday decision-making often involves choosing between uncertain outcomes, with healthy individuals typically preferring known risks over unknown ambiguities, a phenomenon known as "ambiguity aversion."
  • This study investigates how patients with schizophrenia approach decision-making under risk and ambiguity using economic assessments and fMRI, finding that these patients display less ambiguity aversion compared to healthy individuals.
  • Unlike healthy controls, schizophrenia patients showed no significant increase in neural activation in the left lateral orbitofrontal cortex during ambiguous decisions, emphasizing the need to differentiate between risk and ambiguity in understanding their unique decision-making processes.
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Article Synopsis
  • There's increasing interest in how people react to ambiguous situations, with two key concepts: "ambiguity aversion" from economics (favoring known risks) and "ambiguity intolerance" from psychology (dreading ambiguity).
  • The study integrated economic tasks, psychological questionnaires, and brain MRI scans to explore potential links between the two constructs among healthy individuals.
  • Findings showed that ambiguity aversion is linked to personality traits and specific brain regions, while ambiguity intolerance does not correlate with brain structure, indicating they may not be the same and suggesting caution in applying economic theories to psychological contexts.
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Background: Patients with schizophrenia and their families have suffered greatly from stigmatizing effects. Although many efforts have been made to eradicate both prejudice and stigma, they still prevail even among medical professionals, and little is known about how contact with schizophrenia patients affects their attitudes towards schizophrenia.

Methods: We assessed the impact of the renaming of the Japanese term for schizophrenia on clinical residents and also evaluated the influence of contact with schizophrenia patients on attitudes toward schizophrenia by comparing the attitudes toward schizophrenia before and after a one-month clinical training period in psychiatry.

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How does one deal with unfair behaviors? This subject has long been investigated by various disciplines including philosophy, psychology, economics, and biology. However, our reactions to unfairness differ from one individual to another. Experimental economics studies using the ultimatum game (UG), in which players must decide whether to accept or reject fair or unfair offers, have also shown that there are substantial individual differences in reaction to unfairness.

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This paper presents a new model of category judgment. The model hypothesizes that, when more attention is focused on a category, the psychological range of the category gets narrower (category-focusing hypothesis). We explain this hypothesis by using the metaphor of a "mental-box" model: the more attention that is focused on a mental box (i.

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Misestimating risk could lead to disadvantaged choices such as initiation of drug use (or gambling) and transition to regular drug use (or gambling). Although the normative theory in decision-making under risks assumes that people typically take the probability-weighted expectation over possible utilities, experimental studies of choices among risks suggest that outcome probabilities are transformed nonlinearly into subjective decision weights by a nonlinear weighting function that overweights low probabilities and underweights high probabilities. Recent studies have revealed the neurocognitive mechanism of decision-making under risk.

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The old term for schizophrenia, "Seishin-Bunretsu-Byo" (Mind-Split Disease), has been replaced by "Togo-Shitcho-Sho" (Integration Disorder) in Japan. Stigma research requiring individuals to report personal beliefs is useful but is subject to social desirability bias. Using the Implicit Association Test, a measurement designed to minimize this bias, we assessed the impact of this renaming on the stereotype of schizophrenia held by a younger generation.

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