Recordings are often similar to radio plays, and include sound effects and sometimes internal thoughts.

Relatively no noise could be heard, nothing to mar her internal thoughts.

By it I mean whether monkeys have what researchers call "internal thoughts".

People have internal thoughts - we know that, because we think them.

In essence, internal thoughts are suppressed while other parts of the brain get on with doing something specific.

Which brings us back to whether monkeys have similar internal thoughts?

On a serious note, yes, apes do have the ability for internal thought, as do all animals.

Vaintè was still with internal thought for some time, before turning to Fafnepto and speaking again.

He wasn't sure if he'd whispered the words or if they were an internal thought.

A belief is an internal thought or memory which exists in one's mind.