Developmental stuttering (the one that appears in early childhood) is indeed the most common form. It usually arises from a mix of genetic predisposition, brain development, and environmental influences. Covert or situational stuttering, is when a person appears fluent in safe or low-pressure situations but experiences blocks or disruptions when anxiety, social pressure, or fear of judgment is present. The “safe people” factor • This is absolutely valid. When you feel emotionally safe, your anxiety and self-monitoring drop — the brain’s speech-motor coordination system works more fluidly. • But in high-pressure settings (public speaking, interviews, etc.), the anticipation of stuttering activates stress circuits (especially the amygdala and prefrontal cortex), which can interfere with the smooth timing of speech. The “thinking about the block” effect • Also true. The more you consciously anticipate a block (“what if I get stuck on this word?”), the more likely it becomes — a kind of self-fulfilling feedback loop. • When you “don’t give your brain time to think about it,” you bypass that loop, and speech flows naturally.