For what it's worth, I have perhaps the opposite[1], unless imagining a conversation or reading/writing I think almost entirely in mental pictures and the manipulation thereof. It's part of the reason my memory is so effective, and verbal reasoning confounds me to some degree. Cognitive behavioral therapy is definitely not set up for someone with no internal monologue, only an an internal "visiologue."
PS "The vividness of mental imagery has a key role in the development and continuation of intrusive memories," ouch, does it ever. Every embarrassing moment I've ever had is right there at hand.
[1] https://en.wikipedia.org/wiki/Hyperphantasia
PS "The vividness of mental imagery has a key role in the development and continuation of intrusive memories," ouch, does it ever. Every embarrassing moment I've ever had is right there at hand.