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. 2020 Oct 5;8(10):e18160. doi: 10.2196/18160

Table 3.

Test-retest reliability scores ICC(A,1), Cronbach α, and Cohen d of the sSDMT for the healthy control normative group. The numbers in the parentheses after the ICCs(A,1) indicate the lower and upper boundaries of the 95% CI, respectively.

Test-retest ICCa(A,1) Cronbach α Cohen d
sSDMTb test-retest 1 0.877 (0.772-0.931) .943 0.201
sSDMT test-retest 2 0.857 (0.769-0.913) .925 0.116
mean 0.867 (0.771-0.922) .934 0.159

aICC: intraclass correlation coefficient.

bsSDMT: smartphone variant of Symbol Digit Modalities Test.