Basic facts about attraction: physical proximity plays a large role in attraction and relationship formation, we like those who are physically attractive, we like other who are similar to us. Physical characteristics, psychological characteristics (attitudes, education, age, cultural background) (1) classical conditioning. Ucs ucr: no conditioning involved; this happens automatically. (food and salivating) Cs nothing (ringing bell nothing happens) Cs + ucs ucr: dog starts salivating for food when ringing the bell and showing food, this continues to happen. Cs cr (conditioned stimulus to conditioned response) Ronaldo nothing (ronaldo not associated with anything; but every time you have food and ronaldo is present you will associate it with the pleasant feeling) Ronaldo + nice meal pleasant feeling. Study by griffit: attraction to strangers and difference of room temperature. Had participants sit in lab, two conditions: one condition is room temperature; other condition the room is hot and humid (makes you uncomfortable).