Direct observational assessments of child emotion regulation capacities and maternal sensitivity were completed in early infancy, at 12 and 18 months, and at 5 years. (cambridge.org)
It is a dimensional disorder with assessment and diagnosis dependent on careful history taking, and observational assessment in more than one setting. (adc.bmj.com)
Why is observational assessment so valuable, especially for young children? (pearsonclinical.com)