In the 1995 cult classic “Clueless” (dir. Amy Heckerling), the audience hears the inner monologue of goodhearted but ditzy Cher (Alicia Silverstone) as she’s struck with the sudden realization that ...

That little voice in your head – or sometimes the one that escapes your lips – is a constant companion. Self-talk, the act of internally or externally verbalizing thoughts, has often been stigmatized ...

When I first realized my now-husband had an inner monologue, I thought something was wrong with him. My head is quiet all the time, which puts me in the minority since most people have a monologue.

Emily Kwong is pretty sure she lacks an inner monologue, while the inner monologue of producer Rachel Carlson won't stop chatting. But how well can a person know their inner self? And what does ...