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Intuitive decision making as a gradual process: investigating semantic intuition-based and priming-based decisions with fMRI.

Zander T, Horr NK, Bolte A, Volz KG - Brain Behav (2015)

Bottom Line: We realized this by priming participants with concepts associated with incoherent triads in separate priming blocks prior to the coherence judgments.For intuition-based decisions, imaging results mainly revealed activity within the orbitofrontal cortex, within the inferior frontal gyrus and the middle temporal gyrus.Regarding research question 2, we can draw the preliminary conclusion of a qualitative difference between intuition-based and priming-based decisions.

View Article: PubMed Central - PubMed

Affiliation: Werner Reichardt Centre for Integrative NeuroscienceUniversity of TübingenTübingenGermany; International Max Planck Research SchoolTübingenGermany; Department of PsychologyUniversity of BaselSwitzerland.

ABSTRACT

Introduction: Intuition has been defined as the instantaneous, experience-based impression of coherence elicited by cues in the environment. In a context of discovery, intuitive decision-making processes can be conceptualized as occurring within two stages, the first of which comprises an implicit perception of coherence that is not (yet) verbalizable. Through a process of spreading activation, this initially non-conscious perception gradually crosses over a threshold of awareness and thereby becomes explicable. Because of its experiential basis, intuition shares conceptual similarities with implicit memory processes. Based on these, the study addresses two research questions: (1) Is the gradual nature of intuitive processes reflected on a neural level? (2) Do intuition-based decisions differ neurally from priming-based decisions?

Methods: To answer these questions, we conducted an fMRI study using the triads task and presented participants with coherent word triads that converge on a common fourth concept, and incoherent word triads that do not converge on a common fourth concept. Participants had to perform semantic coherence judgments as well as to indicate whether they immediately knew the fourth concept. To enable investigating intuition-based and priming-based decisions within the same task and with the same participants, we implemented a conceptual priming procedure into the coherence judgment task. We realized this by priming participants with concepts associated with incoherent triads in separate priming blocks prior to the coherence judgments.

Results: For intuition-based decisions, imaging results mainly revealed activity within the orbitofrontal cortex, within the inferior frontal gyrus and the middle temporal gyrus. Activity suppression in the right temporo-occipital complex was observed for priming-based decisions.

Conclusions: With respect to research question 1, our data support a continuity model of intuition because the two intuitive stages show quantitatively distinct brain activation patterns. Regarding research question 2, we can draw the preliminary conclusion of a qualitative difference between intuition-based and priming-based decisions.

No MeSH data available.


Related in: MedlinePlus

Imaging results research question 1. Group‐averaged significant activation patterns on coronal, sagittal, and axial slices of an individual brain normalized and aligned to the Talairach stereotactic space are shown. (A) Parametric contrast. (B1) Contrast: Intuitive Processes at the Threshold of Awareness > Incoherence Judgments. (B2) Contrast: Intuitive Processes in the Integrative Stage of Intuition > Incoherence Judgments. IFG = inferior frontal gyrus, ITG = inferior temporal gyrus, MTG = middle temporal gyrus OFC = orbito‐frontal gyrus.
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brb3420-fig-0004: Imaging results research question 1. Group‐averaged significant activation patterns on coronal, sagittal, and axial slices of an individual brain normalized and aligned to the Talairach stereotactic space are shown. (A) Parametric contrast. (B1) Contrast: Intuitive Processes at the Threshold of Awareness > Incoherence Judgments. (B2) Contrast: Intuitive Processes in the Integrative Stage of Intuition > Incoherence Judgments. IFG = inferior frontal gyrus, ITG = inferior temporal gyrus, MTG = middle temporal gyrus OFC = orbito‐frontal gyrus.

Mentions: We first analyzed a parametric contrast in order to explore a possible increase in instances of perceived incoherence from instances of perceived coherence where a CA immediately comes to mind. In parametric contrasts, a continuous increase that is linearly modelled is assumed. This means that all trials within one condition (i.e., in each of our five regressors) are considered equal and at the same time are considered either lower or higher than all trials within the other conditions. Results revealed a bilateral activation within the posterior OFC, within the insula, within the left IFG extending into the frontal pole, and within the left posterior part of the MTG. The temporo‐occipital part of the left inferior temporal gyrus (ITG) and the anterior median prefrontal cortex (mPFC) were activated as well; the latter comprised the pregenual anterior cingulate cortex (ACC, BA 32) and extended into the anterior part of the medial prefrontal cortex (mPFC) (BA 10) (Table 5 and Fig. 4A).


Intuitive decision making as a gradual process: investigating semantic intuition-based and priming-based decisions with fMRI.

Zander T, Horr NK, Bolte A, Volz KG - Brain Behav (2015)

Imaging results research question 1. Group‐averaged significant activation patterns on coronal, sagittal, and axial slices of an individual brain normalized and aligned to the Talairach stereotactic space are shown. (A) Parametric contrast. (B1) Contrast: Intuitive Processes at the Threshold of Awareness > Incoherence Judgments. (B2) Contrast: Intuitive Processes in the Integrative Stage of Intuition > Incoherence Judgments. IFG = inferior frontal gyrus, ITG = inferior temporal gyrus, MTG = middle temporal gyrus OFC = orbito‐frontal gyrus.
© Copyright Policy - creativeCommonsBy
Related In: Results  -  Collection

License
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getmorefigures.php?uid=PMC4834943&req=5

brb3420-fig-0004: Imaging results research question 1. Group‐averaged significant activation patterns on coronal, sagittal, and axial slices of an individual brain normalized and aligned to the Talairach stereotactic space are shown. (A) Parametric contrast. (B1) Contrast: Intuitive Processes at the Threshold of Awareness > Incoherence Judgments. (B2) Contrast: Intuitive Processes in the Integrative Stage of Intuition > Incoherence Judgments. IFG = inferior frontal gyrus, ITG = inferior temporal gyrus, MTG = middle temporal gyrus OFC = orbito‐frontal gyrus.
Mentions: We first analyzed a parametric contrast in order to explore a possible increase in instances of perceived incoherence from instances of perceived coherence where a CA immediately comes to mind. In parametric contrasts, a continuous increase that is linearly modelled is assumed. This means that all trials within one condition (i.e., in each of our five regressors) are considered equal and at the same time are considered either lower or higher than all trials within the other conditions. Results revealed a bilateral activation within the posterior OFC, within the insula, within the left IFG extending into the frontal pole, and within the left posterior part of the MTG. The temporo‐occipital part of the left inferior temporal gyrus (ITG) and the anterior median prefrontal cortex (mPFC) were activated as well; the latter comprised the pregenual anterior cingulate cortex (ACC, BA 32) and extended into the anterior part of the medial prefrontal cortex (mPFC) (BA 10) (Table 5 and Fig. 4A).

Bottom Line: We realized this by priming participants with concepts associated with incoherent triads in separate priming blocks prior to the coherence judgments.For intuition-based decisions, imaging results mainly revealed activity within the orbitofrontal cortex, within the inferior frontal gyrus and the middle temporal gyrus.Regarding research question 2, we can draw the preliminary conclusion of a qualitative difference between intuition-based and priming-based decisions.

View Article: PubMed Central - PubMed

Affiliation: Werner Reichardt Centre for Integrative NeuroscienceUniversity of TübingenTübingenGermany; International Max Planck Research SchoolTübingenGermany; Department of PsychologyUniversity of BaselSwitzerland.

ABSTRACT

Introduction: Intuition has been defined as the instantaneous, experience-based impression of coherence elicited by cues in the environment. In a context of discovery, intuitive decision-making processes can be conceptualized as occurring within two stages, the first of which comprises an implicit perception of coherence that is not (yet) verbalizable. Through a process of spreading activation, this initially non-conscious perception gradually crosses over a threshold of awareness and thereby becomes explicable. Because of its experiential basis, intuition shares conceptual similarities with implicit memory processes. Based on these, the study addresses two research questions: (1) Is the gradual nature of intuitive processes reflected on a neural level? (2) Do intuition-based decisions differ neurally from priming-based decisions?

Methods: To answer these questions, we conducted an fMRI study using the triads task and presented participants with coherent word triads that converge on a common fourth concept, and incoherent word triads that do not converge on a common fourth concept. Participants had to perform semantic coherence judgments as well as to indicate whether they immediately knew the fourth concept. To enable investigating intuition-based and priming-based decisions within the same task and with the same participants, we implemented a conceptual priming procedure into the coherence judgment task. We realized this by priming participants with concepts associated with incoherent triads in separate priming blocks prior to the coherence judgments.

Results: For intuition-based decisions, imaging results mainly revealed activity within the orbitofrontal cortex, within the inferior frontal gyrus and the middle temporal gyrus. Activity suppression in the right temporo-occipital complex was observed for priming-based decisions.

Conclusions: With respect to research question 1, our data support a continuity model of intuition because the two intuitive stages show quantitatively distinct brain activation patterns. Regarding research question 2, we can draw the preliminary conclusion of a qualitative difference between intuition-based and priming-based decisions.

No MeSH data available.


Related in: MedlinePlus