1. Introduction
Autism is the fastest-growing developmental disorder in the U.S., and it affects over 3 million individuals in the U.S. and tens of millions worldwide. Unfortunately, there are no medical detection or cure for autism till now. Some individuals with Autism Spectrum Disorder (ASD) may have to deal with their symptoms lifelong even after treatment and interventions, and autism can cost a family $60,000 a year on average [1]. In addition to social impairment and communication issues, the autism individuals may face significant challenges from the following three aspects. First, they need considerably more time to acquire a skill to fluency and often have difficulties maintaining the skill [2], [3]. Second, individuals with ASD often lack of executive functioning skills such as time management [4], [5]. Third, they also have sensory-based challenges that can cause significant distraction, pain or negative sensory experiences that can result in debilitation or panic. Therefore, individuals with ASD normally need constant prompts and continuous support during their skill development, acquisition, as well as skill maintenance and generalization, even for basic living skills such as eating and cleaning [2], [6]. And they also need continuous interventions to help them stay focused, even when completing familiar tasks. Because of the intensive level of prompts and personal attention needed by individuals with ASD, many of them cannot have an independent and self-conducted life. In order to take care of them, many autism individuals' caregivers have to work from home or do part time job. It increases stress and personal fatigue to the caregivers, and brings growing social and financial burdens to them.