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Table 1 Latin Square Showing the Four Alarm Signal Sequences

From: Optimizing smoke alarm signals: Testing the effectiveness of children’s smoke alarms for sleeping adults

Alarm sequences Night 1 Night 2
Sleep cycle 1 Sleep cycle 2 Sleep cycle 1 Sleep cycle 2
1 A B C D
2 C A D B
3 D C B A
4 B D A C
  1. A, B, C, and D represent the four alarm signals used in the study