The purpose of a screening test is to identify children who are likely, upon further testing, to be diagnosed with an SSD. Which of the following is an accurate description of a good screening test?

The purpose of a screening test is to identify children who are likely, upon further testing, to be diagnosed with an SSD. Which of the following is an accurate description of a good screening test?

• A. Sensitivity: 90% of the children who fail the screen are confirmed to have SSD
• B. Specificity: 90% of the children who pass the screen are confirmed to have SSD
• C. Specificity: 90% of the children who fail the screen are confirmed to have SSD
• D. Sensitivity: 90% of the children who pass the screen are confirmed to have typically developing speech

Answer: (D)

A good screening test for SSD should give you a reliable indication that a child does not have SSD when they pass the screen. That reliability is about the negative result: how often a pass truly means typical speech. The option that says 90% of the children who pass the screen are confirmed to have typically developing speech describes a high negative predictive value—most of the kids who pass really are typical. That reliability is precisely what makes a screening efficient: you can confidently skip further SSD testing for those who pass, reducing unnecessary follow-ups and focusing resources on those who fail and may need more evaluation. The other statements mix up how screening accuracy is measured. They imply high positive predictive value for those who fail, or mislabel the balance between pass/fail and SSD status, which doesn’t align as directly with the practical goal of ruling out SSD for the majority who do not have it.

A good screening test for SSD should give you a reliable indication that a child does not have SSD when they pass the screen. That reliability is about the negative result: how often a pass truly means typical speech. The option that says 90% of the children who pass the screen are confirmed to have typically developing speech describes a high negative predictive value—most of the kids who pass really are typical. That reliability is precisely what makes a screening efficient: you can confidently skip further SSD testing for those who pass, reducing unnecessary follow-ups and focusing resources on those who fail and may need more evaluation.

The other statements mix up how screening accuracy is measured. They imply high positive predictive value for those who fail, or mislabel the balance between pass/fail and SSD status, which doesn’t align as directly with the practical goal of ruling out SSD for the majority who do not have it.