Jillian is participating in an experiment in which she was asked to shadow a message presented to the left ear while simultaneously ignoring a message presented to the right ear. Jillian is LEAST likely to detect which of the following changes in the signals? a. The right ear's message is initially presented in a high-pitched voice but is then spoken by a low-pitched voice.
b. The participant's name is mentioned three times at various points within the right ear's message.
c. Initially, the right ear's message contains a male voice reading a coherent passage, but this is then replaced by the same voice reading a sequence of random words.
d. The right ear's message is initially presented in a soft voice but is then spoken by a loud voice.