In a dichotic listening experiment, refers to the procedure that is used to force participants to pay attention to a specific message among competing messages.
a. rehearsingb. shadowingc. echoingd. delayed repeating

B. shadowing                                  

Explanation:

Shadowing: The term shadowing refers to the phenomenon of phonetic imitation, in which participants are asked to listen and repeat the different isolated words. The shadowing techniques are widely used in the study of attention or cognitive testing in which participants or students repeat the word loudly whatever they hear formerly even in the presence of other stimuli in the surrounding.

In the question above, the process of shadowing is being illustrated.

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