This study investigates the bi-directionality of synaestesic experience by means of a flanked bisection paradigm in TT, a number-colour synaesthete. Previous studies have shown that bisection is shifted towards the larger digit flanker (e.g., Ranzini & Girelli, 2012). TT and controls performed line bisections with lines flanked by black digits (experiment 1), by TT’s photism colours (experiment 2), and by congruently (experiment 3), or incongruently coloured digits (experiment 4). While the results of the control group mainly replicated previous findings, only the colour-digit congruence elicited in TT the larger-digit bias. TT’s absence of effects in the other conditions was not due to reduced sensitivity to luminance effects (experiment 5), or to mathematical expertise (experiment 6). We suggest that grapheme-colour synaesthesia might be characterised by a rigid access to semantic representation when the inducer is task-irrelevant.

Ranzini, M., Girelli, L. (2019). Colours + Numbers differs from colours of numbers: cognitive and visual illusions in grapheme-colour synaesthesia. ATTENTION, PERCEPTION & PSYCHOPHYSICS, 81(5), 1500-1511 [10.3758/s13414-019-01685-9].

Colours + Numbers differs from colours of numbers: cognitive and visual illusions in grapheme-colour synaesthesia

Girelli, Luisa
Ultimo
2019

Abstract

This study investigates the bi-directionality of synaestesic experience by means of a flanked bisection paradigm in TT, a number-colour synaesthete. Previous studies have shown that bisection is shifted towards the larger digit flanker (e.g., Ranzini & Girelli, 2012). TT and controls performed line bisections with lines flanked by black digits (experiment 1), by TT’s photism colours (experiment 2), and by congruently (experiment 3), or incongruently coloured digits (experiment 4). While the results of the control group mainly replicated previous findings, only the colour-digit congruence elicited in TT the larger-digit bias. TT’s absence of effects in the other conditions was not due to reduced sensitivity to luminance effects (experiment 5), or to mathematical expertise (experiment 6). We suggest that grapheme-colour synaesthesia might be characterised by a rigid access to semantic representation when the inducer is task-irrelevant.
Articolo in rivista - Articolo scientifico
Line bisection; Magnitude processing; Numerical cognition; Synaesthesia;
Line bisection; Magnitude processing; Numerical cognition; Synaesthesia; Experimental and Cognitive Psychology; Language and Linguistics; Sensory Systems; Linguistics and Language
English
8-mar-2019
2019
81
5
1500
1511
open
Ranzini, M., Girelli, L. (2019). Colours + Numbers differs from colours of numbers: cognitive and visual illusions in grapheme-colour synaesthesia. ATTENTION, PERCEPTION & PSYCHOPHYSICS, 81(5), 1500-1511 [10.3758/s13414-019-01685-9].
File in questo prodotto:
File Dimensione Formato  
10281-225707.pdf

accesso aperto

Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Dimensione 431.69 kB
Formato Adobe PDF
431.69 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/225707
Citazioni
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 1
Social impact