Frequently Asked Questions
About the Infant-Toddler Developmental Assessment
Is the IDA-2 Reliable and Valid?
Yes. Reliability coefficients for the Provence Profile domain scores are generally quite high, ranging from .90 to .96 for ages 1 to 18 months and .78 to .96 for ages 19 to 36 months. Inter-rater reliabilities range from .91 to .95 for seven of the eight domains and .81 for the remaining domains. Learn more about the IDA-2's Technical Qualities