To determine the type of verbal operant we must analyze four key components what evokes the verbal operant what reinforces it and whether there is formal similarity and pointtopoint correspondence In this scenario 1 Evoking Stimulus The friends signed Hey is evoked by the first persons verbal statement Hey which serves as a verbal discriminative stimulus SD 2 PointtoPoint Correspondence There is pointtopoint correspondence because the spoken Hey and the signed Hey share the same temporal sequence and form of the stimulus product the message conveyed is identical This eliminates Intraverbal as intraverbals by definition lack pointtopoint correspondence 3 Formal Similarity There is no formal similarity The form of the evoking stimulus auditory spoken word is different from the form of the response visual signed word Formal similarity requires the evoking stimulus and the response product to be in the same sense mode eg both auditory both visual Based on these characteristics Echoic An echoic requires both pointtopoint correspondence and formal similarity While there is pointtopoint correspondence the lack of formal similarity spoken vs signed means it cannot be an echoic Transcription Transcription involves writing or typing a verbal stimulus The friends response is signed not written Intraverbal As established intraverbals lack pointtopoint correspondence Since pointtopoint correspondence is present in this scenario it is not an intraverbal Since none of the provided options precisely fit the definition based on the strict criteria of formal similarity and pointtopoint correspondence for the basic verbal operants the correct answer is None of these This highlights the importance of understanding the precise definitions of these critical properties