We are studying sleep and memory in healthy volunteers and individuals with Autism Spectrum Disorder. This study involves three sessions of taking naps after lunch while we record brain activity using non-invasive EEG and magnetoencephalography (MEG), in addition to a finger-tapping task and a separate session for an MRI. We are looking for participants between the ages of 18 and 30 who are fluent in English and have been diagnosed with Autism Spectrum Disorder. Participants will be compensated up to $415 for completing all study procedures. Lunch will be provided during nap visits.