A Semantic Priming Event-related Potential (ERP) Task to Study Lexico-semantic and Visuo-semantic Processing in Autism Spectrum Disorder

The overall goal of this semantic priming ERP methodology is to compare semantic processing of linguistic and non-linguistic stimuli in the form of words and pictures, in individuals with autism spectrum disorders, compared to typically-developing individuals. This method can help answer key questions in the autism field, such as whether individuals with autism spectrum disorders have a global deficit in semantic processing that extends beyond language. The main advantage of this technique is that it uses electroencephalography, a technique of measuring brain activity that can pick up on very subtle differences in cognitive processing between groups.

Demonstrating the procedure will be Emme O'Rourke, a research assistant in my lab. Measure the circumference of the participant's head, passing through the inion and nasion in order to select the appropriate sized EEG net. Begin by immersing the electroencephalography, or EEG electrodes, in electrolyte solution for five minutes.