I was reading Rav Mendle Kaplan’s Torah thoughts, he wrote that when non Jewish men in the olden days would dress neat, wear a suit, a hat, they would dresss menchlitkiet they would behave better, but now as clothing became more casual, they would wear shorts, jeans ect, their behavior became worse, turning to the Jewish men he said, when they dress like a yeshiva boy should look (the Alter’s gadlus haodom’s Derech), they behave better.
In conclusion how you dress, can affect how you behave.