Saying “response” as the result of hearing “response” has already been classified as an echoic. It is not intraverbal because there is point-to-point correspondence between the stimulus and the response, which violates the third part of the definition of the intraverbal.
A form of verbal behavior with the following features:
A verbal response
The prior controlling variable is a verbal stimulus
There is NO point-to-point correspondence between the stimulus and the response