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. Author manuscript; available in PMC: 2016 Aug 1.
Published in final edited form as: Clin Neurophysiol. 2014 Nov 10;126(8):1548–1556. doi: 10.1016/j.clinph.2014.10.158

Table 2.

Mean κ reliability (sample-by-sample and epoch-by-epoch).

Sample Epoch
L M H H+M H+M+L H+M+L p-value2
Intra-expert 0.17±0.10 0.38±0.08 0.60±0.07 0.63±0.07 0.66±0.07 0.72±0.11 n.s.
Inter-expert 0.06±0.07 0.09±0.08 0.43±0.09 0.50±0.06 0.52±0.07 0.51±0.09 n.s.
p-value1 0.02 0.02

The intra-expert and inter-expert reliability is averaged (mean ± SD) over 4 and 24 pairwise reliabilities, respectively. Spindles are divided in groups based on their assigned confidence scores: H (high = ‘definitely’), M (medium = ‘probably’) and L (low = ‘guessing’). Intra-expert versus inter-expert reliability is tested with student t-tests (p-value1) while sample-by-sample versus epoch-by-epoch reliability is tested with paired t-tests for the H+M+L (p-value2). All pairwise reliabilities are listed in Supplementary Tables S3 and S4.