6533b834fe1ef96bd129d788

RESEARCH PRODUCT

Unconscious processing of Arabic numerals in unilateral neglect

Marinella CappellettiLisa CipolottiLisa Cipolotti

subject

AdultMaleVisual perceptionCognitive Neurosciencemedia_common.quotation_subjectExperimental and Cognitive PsychologyNeuropsychological Testsbehavioral disciplines and activitiesFunctional LateralityArabic numeralsNeglectPerceptual DisordersNumeral systemJudgmentBehavioral NeuroscienceReaction TimemedicineHumansmedia_commonNeglect Numerical processing Semantics Unconscious processingChi-Square DistributionUnconscious PsychologySettore M-PSI/02 - Psicobiologia E Psicologia FisiologicaCognitionHemispatial neglectMiddle AgedMagnetic Resonance ImagingPattern Recognition VisualUnilateral neglectAcalculiaFemalemedicine.symptomPsychologyMathematicsPhotic StimulationCognitive psychology

description

This study explores the processing of Arabic numerals in three patients with dense left unilateral neglect. Three tasks have been used: a test of visual awareness (is the stimulus on the left, on the right or on both sides?), a number comparison task (is the number larger or smaller than 5?), a number parity judgment task (is the number odd or even?). The test of visual awareness indicated that all three patients were completely unaware of the stimuli presented in the left hemifield. Despite this, the number comparison and number parity judgment tasks clearly indicated that Arabic numerals were unconsciously processed at semantic level (i.e. quantity). These results show that patients with left unilateral neglect can still semantically process Arabic numerals unconsciously.

yearjournalcountryeditionlanguage
2005-10-27Neuropsychologia
https://doi.org/10.1016/j.neuropsychologia.2006.03.014