Suggestibility and suggestive modulation of the Stroop effect
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Updated: Jun 13, 2026

Examining Bilingual Language Control Using the Stroop Task
Published on: February 26, 2020
1University of Hull, Hull, HU6 7RX, UK. i.kirsch@hull.ac.uk
Abstract:
Although the induction of a hypnotic state does not seem necessary for suggestive modulation of the Stroop effect, this important phenomenon has seemed to be dependent on the subject's level of hypnotic suggestibility. Raz and Campbell's (2011) study indicates that suggestion can modulate the Stroop effect substantially in very low suggestible subjects, as well as in those who are highly suggestible. This finding casts doubt on the presumed mechanism by which suggestive modulation is brought about. Research aimed at uncovering the means by which low suggestible individuals are able to modulate the Stroop effect would be welcome, as would assessment of this effect in moderately suggestible people.
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