Performances on the synesthesia Stroop task in associator synesthetes and non-synesthetes

Research output: Contribution to conference without publisher/journalPosterResearchpeer-review

Abstract

Grapheme-color synesthetes are commonly divided into associators who experience the concurrent colors internally and projectors who experience them externally. The presence of these subgroups was first demonstrated by opposite results in the synesthesia Stroop. Compared to graphemes shown in the correct synesthetic color, graphemes presented in a color incongruent to the synesthetic experience resulted in slower stimuli color naming in projectors and slower synesthetic color retrieval in associators. However, several studies have since then failed to find such clear-cut tendencies. Furthermore, while non-synesthetes appear not affected by the congruency manipulation in the stimuli color naming task, no study to date has investigated whether this was also the case in the color retrieval task. Experiment 1 found a congruency effect in the color retrieval task both in 17 non-synesthetes who were given three minutes to memorize five letter-color associations and in 18 grapheme-color associator synesthetes. Congruency effects in the color naming task were, on the other hand, only found in associator synesthetes, and were larger than the congruency effects in the color retrieval task. To further investigate the processes involved in the color retrieval task, the grapheme-color associator synesthetes were asked to memorize five letter-color associations that differed from their synesthetic experience. A congruency effect was again present in the color retrieval task, but not in the stimuli color naming task. Our results provide evidence that associator synesthetes show larger congruency effects in the stimuli color naming task than in the color retrieval task, contrary to originally claimed, calling for a reevaluation of whether the synesthesia Stroop truly measures differences in phenomenological experiences. Moreover, we propose that congruency effects in the color retrieval task may not reflect the presence of an internal synesthetic experience, but rather the degree to which the color retrieval process lacks automatization.
Original languageEnglish
Publication date10 May 2024
Publication statusPublished - 10 May 2024
EventJoint International Synaesthesia Conference - Somerville College, Oxford, United Kingdom
Duration: 10 May 202412 May 2024
Conference number: 1
https://synesthesia.info/

Conference

ConferenceJoint International Synaesthesia Conference
Number1
LocationSomerville College
Country/TerritoryUnited Kingdom
CityOxford
Period10/05/202412/05/2024
Internet address

Keywords

  • Stroop task
  • Synaesthesia
  • Perception

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