The READi Lab is pleased to add another research measure to our website. The Parent Interview for Autism–Clinical Version (PIA–CV; Stone et al., 2003) was developed to measure autism symptom severity across 11 behavioral domains in young children. Changes in scores on social and communication domains of the PIA-CV have been associated with clinically significant behavioral and diagnostic improvements from age 2 to age 4 in children with ASD (Stone et al., 2003). The PIA-CV can be used in interview or questionnaire format, and is now available in both English and Spanish. To view and download these materials, please visit the Tools and Materials section of our website.