The perceptual system integrates synchronized auditory-visual signals in part to promote individuation of objects in cluttered environments. The processing of auditory-visual synchrony may more generally contribute to cognition by synchronizing internally generated multimodal signals. Reading is a prime example because the ability to synchronize internal phonological and/or lexical processing with visual orthographic processing may facilitate encoding of words and meanings. Consistent with this possibility, developmental and clinical research has suggested a link between reading performance and the ability to compare visual spatial/temporal patterns with auditory temporal patterns. Here, we provide converging behavioral and electrophysiological evidence suggesting that greater behavioral ability to judge auditory-visual synchrony (Experiment 1) and greater sensitivity of an electrophysiological marker of auditory-visual synchrony processing (Experiment 2) both predict superior reading comprehension performance, accounting for 16% and 25% of the variance, respectively. These results support the idea that the mechanisms that detect auditory-visual synchrony contribute to reading comprehension.
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| http://dx.doi.org/10.1162/jocn_a_01052 | DOI Listing |
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Article Synopsis
- Age-related declines in sensory abilities (vision, hearing, and touch) are linked to changes in brain activity as measured by sensory-evoked potentials in older adults compared to younger adults.
- In the study, older adults demonstrated greater amplitude in early sensory responses and increased neural synchrony between prefrontal and sensory cortices, suggesting a common neurobiological mechanism underlying sensory processing changes with aging.
- The findings support the "common cause hypothesis," showing that enhanced neural activity in one sensory domain in older adults correlates with increased activity across other modalities, highlighting the influence of the prefrontal cortex in managing sensory processing.
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