# Concurrent Validity for ASQ-3 Questionnaire Intervals The following tables summarize the concurrent validity calculated by ASQ-3 interval (with data for 9 and 10 months combined), compared with results from early intervention/early childhood special education (EI/ECSE) eligibility evaluations. In 90% of cases, the Battelle Developmental Inventory–II was used as one norm-referenced test in the eligibility determination. “Typical” indicates the child’s developmental status was evaluated as age appropriate; “Eligible” indicates the child was identified as needing further assessment (by the ASQ-3) or eligible for EI or ECSE services (by the Battelle). Note that for several intervals, n is less than 25 and results should be regarded as preliminary. ## 2 month ### Eligibility status Status determined by ASQ-3 | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 0 | 0 | 0 | | Typical | 0 | 9 | 9 | | Total | 0 | 9 | 9 | | Sensitivity | Specificity | False positive | False negative | Percent agreement | Under-identified | Over-identified | | --- | --- | --- | --- | --- | --- | --- | | N/A | 100.0% | 0.0% | N/A | 100.0% | 0.0% | 0.0% | ## 4 month ### Eligibility status Status determined by ASQ-3 | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 2 | 1 | 3 | | Typical | 0 | 3 | 3 | | Total | 2 | 4 | 6 | | Sensitivity | Specificity | False positive | False negative | Percent agreement | Under-identified | Over-identified | | --- | --- | --- | --- | --- | --- | --- | | 100.0% | 75.0% | 25.0% | 0.0% | 83.3% | 0.0% | 16.7% | | Sensitivity | Specificity | False positive | False negative | Percent agreement | Under-identified | Over-identified | | --- | --- | --- | --- | --- | --- | --- | | 75.0% | 92.3% | 7.7% | 25.0% | 85.7% | 9.5% | 4.8% | | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 6 | 1 | 7 | | Typical | 2 | 12 | 14 | | Total | 8 | 13 | 21 | ## 6 month ### Eligibility status (continued) --- ## 8 month ### Eligibility status | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 9 | 1 | 10 | | Typical | 1 | 13 | 14 | | Total | 10 | 14 | 24 | Status determined by ASQ-3 | Sensitivity | Specificity | False positive | False negative | Percent agreement | Under-identified | Over-identified | | --- | --- | --- | --- | --- | --- | --- | | 90.0% | 92.9% | 7.1% | 10.0% | 91.7% | 4.2% | 4.2% | ## 10 month ### Eligibility status Status determined by ASQ-3 | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 7 | 1 | 8 | | Typical | 2 | 12 | 14 | | Total | 9 | 13 | 22 | | Sensitivity | Specificity | False positive | False negative | Percent agreement | Under-identified | Over-identified | | --- | --- | --- | --- | --- | --- | --- | | 77.8% | 92.3% | 7.7% | 22.2% | 86.4% | 9.1% | 4.5% | ## 12 month ### Eligibility status Status determined by ASQ-3 | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 9 | 2 | 11 | | Typical | 1 | 14 | 15 | | Total | 10 | 16 | 26 | | Sensitivity | Specificity | False positive | False negative | Percent agreement | Under-identified | Over-identified | | --- | --- | --- | --- | --- | --- | --- | | 100.0% | 70.0% | 30.0% | 0.0% | 78.6% | 0.0% | 21.4% | | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 4 | 3 | 7 | | Typical | 0 | 7 | 7 | | Total | 4 | 10 | 14 | ## 14 month ### Eligibility status (continued) ## 16 month ### Eligibility status | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 6 | 0 | 6 | | Typical | 1 | 12 | 13 | | Total | 7 | 12 | 19 | Status determined by ASQ-3 | Sensitivity | Specificity | False positive | False negative | Percent agreement | Under-identified | Over-identified | | --- | --- | --- | --- | --- | --- | --- | | 85.7% | 100.0% | 0.0% | 14.3% | 94.7% | 5.3% | 0.0% | ## 18 month ### Eligibility status Status determined by ASQ-3 | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 7 | 4 | 11 | | Typical | 1 | 10 | 11 | | Total | 8 | 14 | 22 | | Sensitivity | Specificity | False positive | False negative | Percent agreement | Under-identified | Over-identified | | --- | --- | --- | --- | --- | --- | --- | | 87.5% | 71.4% | 28.6% | 12.5% | 77.3% | 4.5% | 18.2% | ## 20 month ### Eligibility status Status determined by ASQ-3 | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 14 | 5 | 19 | | Typical | 2 | 13 | 15 | | Total | 16 | 18 | 34 | Status determined by ASQ-3 | Sensitivity | Specificity | False positive | False negative | Percent agreement | Under-identified | Over-identified | | --- | --- | --- | --- | --- | --- | --- | | 87.5% | 72.2% | 27.8% | 12.5% | 79.4% | 5.9% | 14.7% | | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 4 | 2 | 6 | | Typical | 1 | 16 | 17 | | Total | 5 | 18 | 23 | ## 22 month ### Eligibility status (continued) ## 24 month ### Eligibility status | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 31 | 9 | 40 | | Typical | 3 | 23 | 26 | | Total | 34 | 32 | 66 | Status determined by ASQ-3 | Sensitivity | Specificity | False positive | False negative | Percent agreement | Under-identified | Over-identified | | --- | --- | --- | --- | --- | --- | --- | | 91.2% | 71.9% | 28.1% | 8.8% | 81.8% | 4.5% | 13.6% | ## 27 month ### Eligibility status Status determined by ASQ-3 | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 14 | 3 | 17 | | Typical | 4 | 19 | 23 | | Total | 18 | 22 | 40 | | Sensitivity | Specificity | False positive | False negative | Percent agreement | Under-identified | Over-identified | | --- | --- | --- | --- | --- | --- | --- | | 77.8% | 86.4% | 13.6% | 22.2% | 82.5% | 10.0% | 7.5% | ## 30 month ### Eligibility status Status determined by ASQ-3 | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 26 | 2 | 28 | | Typical | 4 | 28 | 32 | | Total | 30 | 30 | 60 | Status determined by ASQ-3 | Sensitivity | Specificity | False positive | False negative | Percent agreement | Under-identified | Over-identified | | --- | --- | --- | --- | --- | --- | --- | | 77.8% | 75.0% | 25.0% | 22.2% | 75.9% | 6.9% | 17.2% | | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 7 | 5 | 12 | | Typical | 2 | 15 | 17 | | Total | 9 | 20 | 29 | ## 33 month ### Eligibility status (continued) ## 36 month ### Eligibility status | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 38 | 4 | 42 | | Typical | 4 | 15 | 19 | | Total | 42 | 19 | 61 | Status determined by ASQ-3 | Sensitivity | Specificity | False positive | False negative | Percent agreement | Under-identified | Over-identified | | --- | --- | --- | --- | --- | --- | --- | | 90.5% | 78.9% | 21.1% | 9.5% | 86.9% | 6.6% | 6.6% | ## 42 month ### Eligibility status Status determined by ASQ-3 | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 10 | 2 | 12 | | Typical | 3 | 4 | 7 | | Total | 13 | 6 | 19 | | Sensitivity | Specificity | False positive | False negative | Percent agreement | Under-identified | Over-identified | | --- | --- | --- | --- | --- | --- | --- | | 76.9% | 66.7% | 33.3% | 23.1% | 73.7% | 15.8% | 10.5% | ## 48 month ### Eligibility status Status determined by ASQ-3 | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 19 | 2 | 21 | | Typical | 4 | 20 | 24 | | Total | 23 | 22 | 45 | | Sensitivity | Specificity | False positive | False negative | Percent agreement | Under-identified | Over-identified | | --- | --- | --- | --- | --- | --- | --- | | 100.0% | 100.0% | 0.0% | 0.0% | 100.0% | 0.0% | 0.0% | | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 3 | 0 | 3 | | Typical | 0 | 20 | 20 | | Total | 3 | 20 | 23 | ## 54 month ### Eligibility status (continued) ## 60 month ### Eligibility status | | Eligible | Typical | Total | | --- | --- | --- | --- | | Eligible | 1 | 1 | 2 | | Typical | 0 | 14 | 14 | | Total | 1 | 15 | 16 | Status determined by ASQ-3 | Sensitivity | Specificity | False positive | False negative | Percent agreement | Under-identified | Over-identified | | --- | --- | --- | --- | --- | --- | --- | | 100.0% | 93.3% | 6.7% | 0.0% | 93.8% | 0.0% | 6.3% |