Final answer:
Masking may be required in speech testing when there is a possibility of sound crossover to the non-test ear.
Step-by-step explanation:
The statement masking may be required in speech testing as well when there is a possibility that the speech stimulus has crossed over and is actually being heard by the non-test ear is True.
When conducting speech testing, it's important to ensure that the speech stimuli are only heard by the test ear, and not the non-test ear. This is achieved by using masking, which involves introducing another sound, called a masker, to the non-test ear. The masker ensures that any sound that may have crossed over to the non-test ear is masked or blocked, allowing the experimenter to accurately assess the hearing ability of the test ear.