The text provides a direct example similar to this scenario if our response is pancakes is it evoked by a verbal SD It is What do you want to eat Is this an intraverbal Absolutely Evoked by a verbal SD Okay No pointtopoint correspondence Conversational answering a question Its going to be an intraverbal In this dinner scenario the sons response We discussed the causes of the American Civil War is evoked by the mothers verbal discriminative stimulus verbal SD What did you learn in history class today The response does not have pointtopoint correspondence the words in the response are not the same as the words in the SD in sequence nor formal similarity the response doesnt sound exactly like the question This fits the definition of an intraverbal Detailed Explanation of Verbal Operants BF Skinners analysis of verbal behavior classifies verbal responses into different operants based on their evoking antecedent and the type of reinforcement they receive Key characteristics for differentiation include Evoking Stimulus What antecedent causes the behavior Reinforcement What consequence strengthens the behavior Pointtopoint Correspondence Is there a match between the beginning middle and end of the verbal SD and the verbal response Formal Similarity Do the verbal SD and the verbal response share the same sense mode eg both spoken both signed and physical properties eg sound topography Lets analyze the options A Mand A mand from demand or command is a verbal operant evoked by a Motivating Operation MO and reinforced by a specific reinforcer For example if the son was thirsty and said Water that would be a mand reinforced by getting water In the given scenario the son is not expressing a want or need but rather answering a question so its not a mand The text clarifies Can this be a man No Because a man is evoked by what A man is evoked by an M o B Tact A tact from contact is a verbal operant evoked by a nonverbal discriminative stimulus eg seeing an object hearing a sound smelling an odor and reinforced by generalized conditioned reinforcement eg social praise Thats right For example if the son saw a picture of the Civil War and said American Civil War that would be a tact In this scenario the response is evoked by a verbal question not a nonverbal stimulus C Intraverbal An intraverbal is a verbal operant evoked by a verbal discriminative stimulus another persons verbal behavior where there is no pointtopoint correspondence between the SD and the response It is reinforced by generalized conditioned reinforcement Answering questions filling in the blanks and engaging in conversation are common examples of intraverbals The sons response perfectly fits this description the mothers question verbal SD evokes the sons answer and theres no direct repetition or matching of words D Echoic An echoic is a verbal operant evoked by a verbal discriminative stimulus where there is pointtopoint correspondence and formal similarity between the SD and the response It is reinforced by generalized conditioned reinforcement For example if the mother said Say American Civil War and the son said American Civil War that would be an echoic In the given scenario the sons response is not a repetition of the mothers question