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Related Concept Videos

Synesthesia01:27

Synesthesia

Synesthesia is a remarkable condition where stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway. People with synesthesia experience a blending or crossing of their senses, such as sight and sound, leading to cross-modal sensations. In this condition, the stimulation of one sense, such as hearing a number or musical note, triggers an experience of another sense, like sensing a specific color, taste, or smell. People...
Introduction to Special Senses01:26

Introduction to Special Senses

Sensory receptors play an integral part in comprehending our external and internal environments. They receive diverse stimuli, converting them into the nervous system's electrochemical signals. This conversion occurs as the stimulus alters the sensory neuron's cell membrane potential, instigating the generation of an action potential. This action potential is subsequently transmitted to the central nervous system (CNS), which integrates with other sensory data or higher cognitive functions.
Sensory Modalities01:15

Sensory Modalities

Sensation typically is the process by which the sensory receptors and sense organs detect stimuli from the internal and external environment and transmit this information to the central nervous system for processing.
General senses refer to the broad category of sensory information detected by receptors in the body and can be further grouped into somatic and visceral senses. Somatic sensations include touch, pressure, temperature, and pain and are essential for navigating our environment and...
Tactile and Chemical Senses01:27

Tactile and Chemical Senses

Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex. This...
Factors Affecting Perception01:25

Factors Affecting Perception

Perception is influenced by perceptual set, context, motivation, and emotion. Perceptual set, or perceptual expectancy, refers to the tendency to perceive things in a particular way, influenced by previous experiences and expectations. This phenomenon affects the interpretation of stimuli, creating a set of mental tendencies and assumptions that impact sensory perceptions of sound, taste, touch, and sight.
An illustrative example of a perceptual set is the scenario where an airline pilot told...
Sensory Perception: Organization of the Somatosensory System01:11

Sensory Perception: Organization of the Somatosensory System

The somatosensory system is the central and peripheral nervous system component that senses and processes touch, pressure, pain, temperature, and body position or proprioception. The process of sensation takes place at three levels:
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the stimulus...

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Related Experiment Video

Updated: May 24, 2026

Training Synesthetic Letter-color Associations by Reading in Color
10:27

Training Synesthetic Letter-color Associations by Reading in Color

Published on: February 20, 2014

Modality and variability of synesthetic experience.

Valentina Niccolai1, Janina Jennes, Petra Stoerig

  • 1Institute of Clinical Neuroscience and Medical Psychology, Heinrich-Heine University of DĂĽsseldorf, Germany. Valentina.Niccolai@hhu.de

The American Journal of Psychology
|March 21, 2012
PubMed
Summary
This summary is machine-generated.

Synesthesia, a neurological phenomenon, often begins in childhood and frequently involves seeing colors with letters or numbers. This study highlights its commonality, particularly cross-modal experiences, and suggests current consistency tests may be inadequate.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Synesthesia is a neurological condition where stimulating one sensory or cognitive pathway triggers involuntary experiences in another.
  • Previous surveys on synesthesia exist, but this study provides new data from a contemporary cohort.

Purpose of the Study:

  • To review existing literature on synesthesia.
  • To report findings from a questionnaire assessing synesthesia experiences, focusing on inducers and modulations.
  • To investigate the prevalence and characteristics of synesthesia in a new cohort.

Main Methods:

  • Review of previous synesthesia surveys.
  • Distribution and collection of an Internet and paper-based questionnaire on synesthesia to 63 participants.
  • Analysis of questionnaire data focusing on demographics, synesthesia types, inducers, and experience modulations.

Main Results:

  • Synesthesia is predominantly developmental (92%) and grapheme-color type (86%).
  • Time-related words perceived spatially (62%), music-color (41%), and sound synesthesia (33%) were common.
  • Multimodal synesthesia (92%) was prevalent, with auditory inducers and visual concurrents most frequent.
  • 17% reported modulations in their synesthetic experiences, challenging presumed consistency.

Conclusions:

  • Synesthesia is a common, often developmental, and frequently multimodal phenomenon.
  • The observed variability and modulations in synesthetic experiences question the reliability of traditional test-retest consistency measures.
  • Further research is needed to understand the full spectrum and consistency of synesthesia.