UCLA developed three ranges for the five domains using typical population cutoffs, which helps to compare how children are doing developmentally both across and within communities and over time. The averages for all records valid for analysis are sorted from lowest to highest to determine the 10th and the 25th percentile population cutoff scores for each developmental domain.
For each domain, children’s performance is compared to their peers. The EDI can also show how children are performing within their communities and larger county.
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