Leonord Mlodinow stated that people tend to unconsciously judge others based on looks and how they present themselves. He used the example of the psychology professor at Princeton who tested this theory on college students. Using election speeches, he changed the speed and tone and asked the students to vote for whom they would pick. The professor then claimed he could predict who would win based on the speech and presentation of the candidate. Mlodinow later describes how these judgments are all made unconsciously.
I can use this information later in life when I give speeches or if I just want to interest or persuade someone. I have my senior presentation coming up so I should change the tone, pitch and speed of my voice in order for my classmates to like the speech better. I should speak louder in order to make my speech seem genuine and unique. Mlodinow also said due to the unconscious mind people tend to like people who smile, act nice, and make slight contact with them. In my speech I will be sure to smile and make the audience laugh sometimes. Even in regular conversations I should do these things because the other person unconsciously will feel better.