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Author Question: Grace randomly assigns college-bound African-American students to the intervention or to a control ... (Read 53 times)

sabina

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Grace randomly assigns college-bound African-American students to the intervention or to a control condition.  Grace gives a mathematics achievement test in September to both groups.  Through the academic year the treatment condition receives the intervention.  She uses end of year achievement tests to see whether there are differences between conditions. Grace found that students studied together for the end of year achievement tests.  She believes that some of the students in the treatment condition shared intervention information with the control group.  Which of the following threats does Grace now have to be most concerned about?
◦ Selection by treatment
◦ Maturation by treatment
◦ Statistical regression
◦ Treatment diffusion


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Marked as best answer by sabina on Mar 8, 2019

macmac

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Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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macmac

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