The main aim of the study is to investigate whether APP-based emotional recognition training improve social function in autistic children.

50 ASD children age ranged from 4-10 years old will be randomly allocated to either app-based emotional recognition training or memory training groups for 2 months. Before and after training, some assessements were measured including Autism Diagnostic Observation Schedule-2, Childhood Autism Rating Scale, Wechsler Intelligence Scale and Psychoeducational Profile-3. Some other questionnaires are also collected including Social Responsibility Scale-2,Repetitive behavior scale-Revised,Caregiver Strains Questionnaire，Social Communication Questionnaire，Social Anxiety Scale for Children，Adaptive behavior assessment Schedule. Four eye-tracking tasks as follows: (1) Dynamic geometrical paired with dynamic child dancing; (2) Static neutral and emotional faces; (3) A dynamic gaze-following task; (4) social interaction behaviors paired with the toys alone; (5) spinning actions conducted via children paired with objects.

Inclusion criteria: Clinical diagnosis of Autism Spectrum Disorder and follow these criteria: (1) Age range: 4-10 years old, gender not limited;(2) Ethnicity: Han nationality;(3) Autism Diagnostic Observation Schedule-Second Edition (ADOS-2) Comparison Score greater than or equal to 5 points (Le et al., 2022);(4) Considering that only high-functioning autism individuals can successfully complete the eye-tracking tasks, children with a Wechsler score greater than or equal to 60 points are selected; Exclusion criteria: (1) No neurological complications, such as epilepsy, cerebral palsy, fragile X syndrome, etc.;(2) No prior medical interventions, such as taking antipsychotic drugs, receiving transcranial magnetic stimulation, acupuncture, etc.;(3) No abnormal imaging diagnosis or any brain injury.