A closer look at “How Inner Speech and Talking Out Loud Affect Your Eyes Differently: New Pupil Study”, exactly as the source publishes it. Scientists have discovered that the way you talk to yourself—whether silently in your head or out loud—changes your pupils in measurably different ways. A new study published in the Journal of Cognitive Neuroscience found that inner speech causes pupil dilation that peaks later and lasts longer compared to external speech.
The research, led by Thomas Hinault at the French National Centre for Scientific Research, used eye-tracking technology to monitor 22 participants as they performed tasks involving silent and spoken word generation. Understanding these physiological differences matters because it sheds light on how the brain manages language and attention, with potential implications for diagnosing conditions like schizophrenia, where inner speech is disrupted. This listing links straight to the original page, where the content is available in full.