Answer :
Final answer:
Leaving out the last word in a line when singing a song is a method used to assess for 'mands', which are requests within the context of verbal behavior analysis.
Explanation:
Singing a song while leaving out the last word in a line is a good way to assess for a type of verbal operant known as a mand.
In behavioral psychology, particularly within the framework of B.F. Skinner's analysis, a mand is a type of verbal behavior that is reinforced through the realization of a specific need or want; it's essentially a command or a request.
By omitting the last word, the listener is prompted to supply the missing word, which is an indication of their understanding and ability to request or command a specific item or information verbally.