A method of receiving signals in an audience response system on a plurality of channels comprises receiving a first number of signals on a first channel during a first period of reception for a first predetermined length of time. The method further comprises transmitting at least one acknowledgment signal. The method further comprises receiving a second number of signals on a second channel during a second period of reception for a second predetermined length of time. The method further comprises transmitting at least one additional acknowledgment signal. The method further comprises comparing the first number of signals to the second number of signals. The method further comprises adjusting a future predetermined length of time for a period of reception on one of the first and second channels based on the comparison.