Bob believes that women are lousy drivers. Whenever Bob sees…

Bob believes that women are lousy drivers. Whenever Bob sees a woman driving badly he notices it and remembers it very clearly but any time he sees a man drive badly he is less likely to notice and does not remember it the next day. What is this error in human thinking called? 

When the teacher TELLS the students that she is going to cre…

When the teacher TELLS the students that she is going to create an in-group/out-group within the classroom [without using those words], then proceeds to explain that people with blue eyes are better than those with brown eyes and will therefore get extra priviliges, how do the kids immediately react?