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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