The discovery could pave the way for earlier diagnosis and intervention of the condition.
Researchers from the Hebrew University of Jerusalem and the Edmond & Lily Safra Center for Brain Sciences, decided to carry out a number of experiments with dyslexics and non-dyslexics to shine new light on the mechanisms behind this condition.
“While dyslexics are mainly diagnosed according to their reading difficulty, they also differ from non-dyslexics in performing simple perceptual tasks, such as tone-frequency discrimination,” said first author Sagi Jaffe-Dax.
“Our lab previously found that this is due to ‘poor anchoring’, where dyslexics have an inefficient integration of information from recent stimuli, collected as implicit memory. This memory typically forms ‘anchors’ that provide specific predictions that clarify noisy stimuli, and we wanted to see why this is not the case in dyslexics,” said lead researcher Dr. Merav Ahissar.
In the current study, the team gave 60 native Hebrew speakers, including 30 dyslexics and 30 non-dyslexics, frequency discrimination and oral reading tasks.