9. Following the above problem, another way to obtain the reliability of the test is simply using the test-retest technique, although we have more than two test administrations. Since we have 5 administrations, there will be 10 correlations, as follows. 3 Adl Ad2 Ad3 Ad4 Ad5 Adl 1.00 .90 .93 .92 95 Ad2 1.00 .85 .92 .89 Ad3 1.00 .97 .87 Ad4 1.00 .87 Ad5 1.00 9.1. The correlation between the test scores of Adl and Add is 1) .85 2) .92 3) .95 4) .97