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Table 1 Inter-rater reliability with multiple observers witnessing identical SLAG sessions

From: Slow angled-descent forepaw grasping (SLAG): an innate behavioral task for identification of individual experimental mice possessing functional vision

  Rater         
Mouse A B C D E F G H I
1 + + + + + + + + +
2 - - - - - - - - -
3 + + + + + + + + +
4 + + + + + + + + +
5 - - - - - - - - -
6 + + + + + + + + +
7 + + + + + + + + +
8 - - - - - - - - -
9 - - - - - - - - -
10 - - - - - - - - -
11 + + + + + + + + +
12 + + + + + + + + +
13 - - - - - - - - +
14 + + + + + + + + +
15 + + + + + + + + +
16 - - - - - - - - -
17 + + + + + + + + +
18 + + + + + + + + +
19 - - - - - - - - -
20 - - - - - - - - -
21 + + + + + + + + +
22 + + + + + + + + +
  1. Nine people (raters A-I, columns) were familiarized with SLAG performance and scoring techniques. Each participant independently viewed a collection of videos of SLAG being performed on 22 mice (rows), and scored each mouse as (+) or (−). All scores except for one coincided between raters. Light’s modified Cohen κ-statistic for inter-rater reliability [19] was calculated to be 0.98, indicating a high level of scoring agreement between raters.