How Lack of Visual Experience Shapes Language Production

Published on January 6, 2023

Imagine a landscaper who has never seen a beautiful garden, but only hears about it from others. Their description of the garden would likely focus more on the paths and landmarks rather than the visual details. Similarly, a new study explores how lack of visual experience affects the way we use language. Researchers compared descriptions of motion events by congenitally blind individuals, blindfolded individuals, and sighted individuals. The study found that blind individuals paid more attention to the path of motion rather than the manner of motion compared to sighted individuals. They also used more landmarks and path verbs to convey their descriptions. Moreover, blind individuals gestured more towards landmarks and depicted less manner in their gestures compared to sighted individuals. These findings suggest that visual experience plays a crucial role in shaping how we express spatial events through language. Furthermore, they imply that blindness could enhance sensitivity to paths of motion due to changes in event perception. This research may inform our understanding of how our sensory experiences influence language processes. To learn more, dive into the full article!

Abstract
The human experience is shaped by information from different perceptual channels, but it is still debated whether and how differential experience influences language use. To address this, we compared congenitally blind, blindfolded, and sighted people’s descriptions of the same motion events experienced auditorily by all participants (i.e., via sound alone) and conveyed in speech and gesture. Comparison of blind and sighted participants to blindfolded participants helped us disentangle the effects of a lifetime experience of being blind versus the task-specific effects of experiencing a motion event by sound alone. Compared to sighted people, blind people’s speech focused more on path and less on manner of motion, and encoded paths in a more segmented fashion using more landmarks and path verbs. Gestures followed the speech, such that blind people pointed to landmarks more and depicted manner less than sighted people. This suggests that visual experience affects how people express spatial events in the multimodal language and that blindness may enhance sensitivity to paths of motion due to changes in event construal. These findings have implications for the claims that language processes are deeply rooted in our sensory experiences.

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