Worksheet TOTAL Start writing here: 100 100 A common complaint among toddlers is headache. Pediatricians categorize headaches as being of two kinds: migraine and non-migraine. Correct diagnosis is important because the treatments are different for the two types of headache. Diagnosis of headaches is difficult with toddlers because a child is often unable to verbally express the symptoms. As a result, an intervention is proposed in which children's drawing are used to analyze subjective feeling. Does this intervention work? In a recent study, children at a pediatric clinic who complained of headaches were given a piece of blank paper and pencil, and asked: Please draw a picture of yourself having a headache. Where is your pain? What does your pain feel like? Are there any other changes that come before or during your headache that you can show me in a picture? One group of physicians categorized the children's drawings as indicating symptoms of migraine, and a different group of pediatricians provided the usual clinical diagnosis of the children's headaches as a gold standard. Their hope is that they can use these drawings as a diagnostic tool when working with toddlers. The results of the observations are in the table below: Pediatric Migraine Headache: Pictures for Diagnosis Migraine Nonmigraine Diagnosed Diagnosed Clinically Clinically Total Positive Test: Migraine Features in Drawing 121 18 139 Negative Test: No Migraine Features in Drawing 9 87 96 Total 130 105 235 a. Compute the sensitivity of the test and interpret this value. (40 points) b. Compute the specificity of the test and interpret this value. (40 points) c. What is the strength of this test? That is, would you use it for sensitivity or specificity? Alternatively, both? State your reasoning. (20 points)