Peter, a psychology student, is working on identifying the ways in which adults interpret information and then use the information to solve problems and make decisions. in this scenario, peter's research most likely reflects the approach to psychology.

I believe the answer is: cognitive approach

Cognitive approach of psychology considers several factors such as personal attention, language use, perception, memory, problem solving, and  creativity as crucial parts to influence how people thinks. Due to the difference in these factors, how people interpret new information would also be different.

it´s related to his charming character.

beauty is not everything, although we can joke that girls only care about the physical or material aspect, the truth is that a real woman looks at more important things, besides intelligence and personality, there are other attitudes that make irresistible to men who are 'unattractive'.

for example develop your sense of humor.