What is it called when you talk to yourself and don't respond to others at all?

Talking to yourself without responding to others is often referred to as "self-talk." This can manifest as an internal dialogue or vocalizing thoughts aloud, and it serves various purposes, such as problem-solving, self-reflection, or emotional processing. While it can be a normal behavior, excessive self-talk, especially when it leads to social withdrawal, might indicate underlying issues that could benefit from attention.