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a question like this just throws me off. I just don't know what to do. can anyone help me out?
A study of 20 adults with attention-deficit/hyperactivity disorder (ADHD) and 20 age-matched adults without ADHD showed an increase in dopamine transporter protein density by single-photon emission computed tomography (SPECT) in the brain. Medication was withheld from the affected group for 1 month to eliminate the potential of induced upregulation of the gene. Analysis of the dopamine transporter gene identified a 10–base pair (bp) repeat in the 3’ untranslated region (UTR). The presence of a 9-bp allele and single nucleotide mutations in the 10-bp repeat is associated with differences in dopamine transporter gene expression. What larger population study design will provide the strongest association between the dopamine transporter and ADHD?
A study of 20 adults with attention-deficit/hyperactivity disorder (ADHD) and 20 age-matched adults without ADHD showed an increase in dopamine transporter protein density by single-photon emission computed tomography (SPECT) in the brain. Medication was withheld from the affected group for 1 month to eliminate the potential of induced upregulation of the gene. Analysis of the dopamine transporter gene identified a 10–base pair (bp) repeat in the 3’ untranslated region (UTR). The presence of a 9-bp allele and single nucleotide mutations in the 10-bp repeat is associated with differences in dopamine transporter gene expression. What larger population study design will provide the strongest association between the dopamine transporter and ADHD?