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. 2008 Dec 10;3(12):e3912. doi: 10.1371/journal.pone.0003912

Table 1. Frequency of beeps.

Group Frequency of beeps Number of infants
CE1 CNE2
Experimental group 400 Hz 700 Hz n = 14
700 Hz 400 Hz n = 14
Control group 400 Hz 400 Hz n = 14
700 Hz 700 Hz n = 14
1

A cue was followed by an event with a delay.

2

A cue was not followed by any event.