A Researcher in the Area of Cognitive Functioning Has Designed

Short Answer

A researcher in the area of cognitive functioning has designed a new test of creativity, called the CIA test (Cognitive Information Assessment). A random sample of ten, five-year-old children is selected and given the test. A week later the same test was administered for a second time. Estimate the reliability of this test. $$\begin{array} { l c c c } \text { Subject \# } & &\text { Test } & \text { Retest } \\& & \mathrm { X } & \mathrm { Y } \\1 & \cdot & 30 & 33 \\2 & \cdot & 10 & 15 \\3 & \cdot & 20 & 18 \\4 & \cdot & 18 & 20 \\5 & . & 22 & 16 \\6 & . & 23 & 21 \\7 & . & 17 & 15 \\8 & \cdot & 20 & 22 \\9 & . & 25 & 28 \\10 & . & 15 & 15\end{array}$$