The Baby and Infant Screen for Children with Autism Traits, Part 3 (BISCUIT-Part 3) Is a short scale of 15 items , focused on infants with Autism aged 17 to 37 months of age, to assess challenging behaviours. It presents clinical cut-off scores for no or minimal impairment, moderate impairment, and severe impairment. It was used in one observational study in the review [ 40 ].