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Related Concept Videos

Olfaction01:25

Olfaction

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The sense of smell is achieved through the activities of the olfactory system. It starts when an airborne odorant enters the nasal cavity and reaches olfactory epithelium (OE). The OE is protected by a thin layer of mucus, which also serves the purpose of dissolving more complex compounds into simpler chemical odorants. The size of the OE and the density of sensory neurons varies among species; in humans, the OE is only about 9-10 cm2.
The olfactory receptors are embedded in the cilia of the...
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Metacognition01:26

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Metacognition is a conscious process where individuals are aware of their cognitive and executive processes, such as planning before solving a problem or self-monitoring during reading. For instance, a writer may need help with composing a piece. The situation involves a writer who is working on a piece of writing, but while doing so, they realize that something is missing. They notice that their characters lack depth or details. This realization occurs because the writer is reflecting on their...
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Physiology of Smell and Olfactory Pathway01:20

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Humans detect odors with the help of specialized cells located in the upper part of the nasal cavity, called olfactory receptor neurons (ORNs). ORNs possess hair-like structures called cilia, which are receptive to sensations from the inhaled air. When an odorant molecule binds to a specific receptor on the cell of the cilia, it leads to a series of events that ultimately cause the ORN to send electrical signals to the olfactory bulb in the brain through the olfactory nerves.
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Introspection01:29

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Introspection, long upheld as a reliable route to self-knowledge, involves examining one's thoughts, emotions, and mental processes. It underpins many psychological practices, from mindfulness meditation to psychotherapy and self-help strategies. However, empirical evidence challenges the accuracy of introspection as a means of understanding oneself.Limitations of Introspective InsightSeminal work by Nisbett and Wilson demonstrated that individuals are frequently unaware of the true causes...
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Olfactory Receptors: Location and Structure01:03

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The process of olfaction, also known as the sense of smell, is a sophisticated chemical response system. The specialized sensory neurons that facilitate this process, known as olfactory receptor neurons, are situated in an upper segment of the nasal cavity, known as the olfactory epithelium. Olfactory sensory neurons are bipolar, with their dendrites extending from the epithelium's apex into the mucus that lines the nasal cavity. Airborne molecules, when inhaled, traverse the olfactory...
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Hindsight bias leads you to believe that the event you just experienced was predictable, even though it really wasn’t. In other words, you knew all along that things would turn out the way they did. Can you relate this to the phrase "Hindsight is 20/20" now? 
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Related Experiment Video

Updated: Jan 12, 2026

Olfactory Context Dependent Memory: Direct Presentation of Odorants
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Olfactory Context Dependent Memory: Direct Presentation of Odorants

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Investigating the Correspondence between Accuracy, Confidence, and Metacognitive Insight for Olfactory Processing.

Beth F Longley1, Mao Hsiang Hsiao1, Barry C Smith2

  • 1Institute of Cognitive Neuroscience, 57151University College London, London, UK.

Multisensory Research
|November 5, 2025
PubMed
Summary
This summary is machine-generated.

Metacognitive insight into olfactory ability varies by task. Confidence and accuracy align in olfactory discrimination and identification, but not in threshold tasks, indicating reduced insight for threshold assessment.

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Area of Science:

  • Neuroscience
  • Sensory Perception
  • Cognitive Psychology

Background:

  • Olfaction is a crucial sense impacting cognition, emotion, mental health, and aging.
  • Discrepancies exist between objective performance and subjective confidence in sensory domains like interoception.
  • Similar discrepancies may be present in olfactory processing, affecting self-awareness of olfactory ability.

Purpose of the Study:

  • To investigate the relationship between behavioral accuracy, self-reported confidence, and metacognitive insight in olfactory processing.
  • To examine how these relationships differ across various olfactory tasks (threshold, discrimination, identification).
  • To understand the multidimensional nature of olfactory ability and its assessment.

Main Methods:

  • Utilized the Sniffin' Sticks Test to assess olfactory threshold, discrimination, and identification.
  • Employed a multidimensional framework to analyze behavioral accuracy, confidence ratings, and metacognitive insight.
  • Recruited participants to complete olfactory tasks and provide confidence judgments.

Main Results:

  • Participants showed varied metacognitive insight, with significantly lower insight for the olfactory threshold task.
  • Accuracy and confidence were unrelated in the threshold task but aligned in discrimination and identification tasks.
  • Metacognitive insight was not consistent across different olfactory tasks.

Conclusions:

  • Metacognitive insight into olfactory ability is task-dependent, particularly reduced for olfactory threshold assessment.
  • Individuals with high olfactory threshold sensitivity may lack corresponding confidence, highlighting a specific deficit in insight.
  • Further research is needed to validate these findings and explore olfactory processing in aging populations and its link to neurological conditions.