Discussion Based on 160 articles, available evidence on 10 psychometric properties of 117 ECD tools for children 0–6 years old in LMICs is fragmented, limited and heterogeneous. The most frequently provided evidence was on internal consistency reliability, test–retest reliability and/or concurrent, convergent and structural validity. Psychometric evidence on measurement invariance was the least commonly available. Although evidence came from 55 LMICs, four countries were most represented.