According to the article Old Folks at Home, concerning the ability of older people to perform household tasks, the familiar tasks were most similar to:

Effective research on personality requires two kinds of efforts or approaches. They are

a. classifying people into certain groups, and distinguishing the features of the groups. b. identifying personality characteristics and determining the variables that produce and control them. c. relating information learned from animal models and distinguishing the differences between those models and different human populations. d. measuring the differences in personalities between people and relating those data to the development of specific types of personality traits. e. classifying people into certain groups and studying them longitudinally to determine how they are changed by subsequent experience.

John Bowlby's attachment theory emphasized

a. the social environment in forming attachments. b. the quality of parental care in forming attachments. c. the quality of early reinforcers and stimulation in forming attachments. d. the necessity of independence from parental figures in forming attachments.