Synesthesia is associated with distinctive patterns in dream content.
Consciousness and cognition January 1, 2026 Kyle Napierkowski, Emily Cook
People with synesthesia, a condition where sensory experiences blend (e.g., seeing colors for sounds), report dreams with distinct thematic content compared to those without synesthesia. Analyzing 2,337 dream reports from Reddit (1,169 from self-identified synesthetes and 1,168 matched controls), researchers used language models to detect group differences. Four themes—digital, interpersonal regret, diverse worlds, and violent conflict—were significantly more common in synesthete dreams. These findings suggest that synesthesia reflects broader differences in cognitive organization that persist during dreaming, supporting the idea that dreaming is continuous with waking thought and that stable traits shape spontaneous mental experiences.