I believe that your mindset can influence your stutter but I don’t believe it’s all in the mind. I do stutter more when I’m anxious or thinking too much about my speech. But I have stuttered since I began speaking. I still stutter regardless of what emotion I feel or how intense the emotion is. I’ve stopped trying to crack the code on how I can stutter less. I let it happen now. I work with it rather than fight against it