Table 5.
Age-specific psychological assessments for participant selection
| Age | Screening test | Additional assessment | |
|---|---|---|---|
| ASD screening tests | Language and functional level assessment | ASD diagnostic assessment (If above screening cutoff) | |
| 18–23 months | K-DST, BeDevel, M-CHAT, Q-CHAT | SELSI, CBCL 1.5-5, K-VABS | ADOS-2 |
| 24–29 months | K-DST, BeDevel, M-CHAT, Q-CHAT, SCQ | SELSI or PRES, CBCL 1.5-5, K-VABS | ADOS-2, K-CARS-2 |
| 30 months | K-DST, BeDevel, M-CHAT, Q-CHAT, SCQ, SRS | SELSI or PRES, CBCL 1.5-5, VABS | ADOS-2, K-CARS-2 |
| 31–42 months | K-DST, BeDevel, SCQ, SRS | SELSI or PRES, CBCL 1.5-5, VABS | ADOS-2, K-CARS-2 |
| 43–48 months | K-DST, SCQ, SRS-2 | SELSI or PRES, CBCL 1.5-5, VABS | ADOS-2, K-CARS-2 |
ADOS-2 Autism Diagnostic Observation Schedule, K-CARS Korean version of the Childhood Autism Rating Scale, Second Edition, K-DST Korean Developmental Screening Test for Infants and Children, BeDevel-I/P Behavior; Development Screening for Toddlers-Interview/play, M-CHAT Modified Checklist for Autism in Toddlers, Q-CHAT Quantitative Checklist for Autism in Toddlers, SELSI Sequenced Language Scale for Infants, CBCL Korean version of the Child Behavior Checklist 1.5–5, K-VABS Korean Vineland Adaptive Behavior Scales, Second Edition, SCQ-L Social Communication Questionnaire Lifetime Version, SRS-2 Social Responsiveness Scale, Second Edition, Preschool version, PRES Preschool Receptive-Expressive Language Scale.