(chapter 5) Perfectionism: perfectionism is the need to be flawless and setting unrealistically high expectations/goals that can't be attained ,followed by over critical self-evaluation .
(Chapter 5)Homosexuality: homosexuality is the attraction between members of the same sex/gender
(Chapter 5)Birth order: Birth order is the ranking of siblings by age in which certain personalities and attributes are given due to the order in which they are born
(chapter 4) Marriage: Is a cultural and social ritual that takes place between two people , and by law are given certain duties and responsibilities .
(Chapter 5) facial expressions: facial expressions reflects a person's thoughts/feelings . Through the FACS coding system we can categorize facial expressions by its characteristics