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Pearson Correlation Coefficient Analysis: (Research Scenario: For all problems, interpret results based on an alpha level of a = .05.)
A neuropsychologist is examining the relationship between two measures of cognitive functioning in a sample of 14 patients being assessed for dementia. One is the Trail Making Test- Part A (TMT) (Reitan, 1958), which measures the time (in seconds) it takes for patients completing connect-the-dots-style task. A longer time to complete the task indicates more cognitive impairment. The other is the Mini-Mental State Exam (MMSE) (Folstein et al., 1975), which assess a patient's ability to perform common mental tasks. Higher scores indicate better cognitive functioning. The scores are listed in the table below.
Using this table, enter the data into a new SPSS data file and run a Pearson correlation coefficient analysis to test whether there is a relationship between scores on the TMT and the MMSE in patients being assessed for dementia. Use a scatterplot to display the relationship between the variables. Follow the directions below the table to complete the homework.
TMT Score (in seconds) MMSE Score
56 25
98 18
89 18
104 7
87 15
145 12
64 28
70 24
89 16
73 20
76 14
137 9
98 15
52 23
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