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The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
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A Method to Study Adaptation to Left-Right Reversed Audition
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Fundamental differences in change detection between vision and audition.

Laurent Demany1, Catherine Semal, Jean-René Cazalets

  • 1Laboratoire Mouvement, Adaptation, Cognition (UMR CNRS 5227), Université de Bordeaux, 146 rue Leo Saignat, 33076, Bordeaux, France. laurent.demany@u-bordeaux2.fr

Experimental Brain Research
|April 7, 2010
PubMed
Summary
This summary is machine-generated.

Auditory change detection is automatic and relies on implicit memory, unlike visual change detection which requires attention. Small auditory changes are detected even across long time gaps.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Sensory Perception

Background:

  • Change detection is a fundamental cognitive process.
  • Comparing auditory and visual modalities reveals differences in perceptual and memory systems.

Purpose of the Study:

  • To compare auditory and visual change detection using matched stimuli and tasks.
  • To investigate the role of attention and temporal gaps in auditory and visual change detection.

Main Methods:

  • Participants performed present/absent and direction-judgment tasks for auditory (tones) and visual (dots) stimuli.
  • Stimuli were matched across modalities, with a probe presented before or after a test stimulus.

Main Results:

  • Visual performance was better in the present/absent task than direction-judgment, while auditory performance showed the opposite pattern.
  • Visual performance depended on attention and temporal interval; auditory performance did not.

Conclusions:

  • Auditory change detection can occur automatically, leveraging an implicit memory system.
  • This automatic auditory process appears distinct from visual change detection mechanisms, especially across temporal gaps.