The parents filled out an extensive questionnaire describing the child's birth and previous health, educational and social experiences, interests, and conduct. The children's teachers filled out a similar questionnaire. Socioeconomic status was also obtained by collecting the highest level of education for both parents and the father's occupation.

The children took a battery of intelligence, achievement, and personality tests and answered questionnaires about their interests in and knowledge of many matters. General mental ability was computed based on participants' scores on the Stanford-Binet Intelligence Test. The 8 tests completed covered many topics including reading, arithmetic, language usage, spelling and science.

The parents filled out an extensive questionnaire describing the child's birth and previous health, educational and social experiences, interests, and conduct. The children's teachers filled out a similar questionnaire.

The children took a battery of intelligence, achievement, and personality tests and answered questionnaires about their interests in and knowledge of many matters.

The participant's conscientiousness, extraversion and neuroticism were evaluated by the participant, a parent and a teacher.

The primary source of data was questionnaires filled out by the participants and their spouses.

The follow-up questionnaires were concerned with the evolution of the respondents' careers, activity patterns, and personal adjustment.

Retrospective family history given by the participants identified those who had experienced a parental divorce. The level of attachement to each parent as a child was reported by the participants. Ambition was also assessed.

The follow-up questionnaires were concerned with the evolution of the respondents' careers, activity patterns, and personal adjustment.

The information collected covered development of personality and temperament, and included an elaborate study of marital relationships.

Ambition was reported by the participant and a parent. Information was also collected about educational attainment, educational prestige, occupation prestige and income. Information on personality was collected again and covered the participants' conscientiousness, extraversion and neuroticism. Finally, self-reported alcohol problem was assessed.

The follow-up questionnaires were concerned with the evolution of the respondents' careers, activity patterns, and personal adjustment.

The 1945 follow-up focused on the effects of the WWII military effort on the participants.

Information was also collected about occupation prestige and income.

The follow-up questionnaires were concerned with the evolution of the respondents' careers, activity patterns, and personal adjustment.

The information collected covered development of personality and temperament, and included an elaborate study of marital relationships. Also, a lengthy biographical data questionnaire was added.

Information was also collected about educational attainment, educational prestige, occupation prestige and income. Self-reported alcohol problem was also assessed.

The follow-up questionnaires were concerned with the evolution of the respondents' careers, activity patterns, and personal adjustment.

The 1955 follow-up was more modest. It included information on occupation prestige and income.

The follow-up questionnaires were concerned with the evolution of the respondents' careers, activity patterns, and personal adjustment.

The 1960 follow-up was more modest. In included information on occupation prestige and income. Self-reported alcohol problem was also assessed.

The information collected was oriented to problems of aging, such as life satisfactions, retirement, living arrangements, and health and vitality.

Participants were asked to report their satisfaction with 5 domains of life: occupation, family life, leisure activities, health and joy in living. Vitality was assessed by self-rated energy and happiness. Occupational success, retirement status, income level, self-reported physical health, self-reported emotional health and marital status were also collected.

The information collected was oriented to problems of aging, such as life satisfactions, retirement, living arrangements, and health and vitality.

Family engagement was calculated with communication with offspring, communication with siblings and time with relatives. Civic involvement was assessed by the sum of 9 items: participation in service, community, professional, religious, political, social, educational, recreational, and miscellaneous organizations.

The information collected was oriented to problems of aging, such as life satisfactions, retirement, living arrangements, and health and vitality.

Longevity was assessed by contacting the participants and recording wether the participant was still living.

The information collected was oriented to problems of aging, such as life satisfactions, retirement, living arrangements, and health and vitality.

The data collected in 1986 included questions about changes in well-being, time use, importance of religion, perspectives on life accomplishments, changes in family relationships, concerns and goals.

The information collected was oriented to problems of aging, such as life satisfactions, retirement, living arrangements, and health and vitality.

The parents filled out an extensive questionnaire describing the child's birth and previous health, educational and social experiences, interests, and conduct. The children's teachers filled out a similar questionnaire.

The children took a battery of intelligence, achievement, and personality tests and answered questionnaires about their interests in and knowledge of many matters.

The participant's conscientiousness, extraversion and neuroticism were evaluated by the participant, a parent and a teacher.

The primary source of data was questionnaires filled out by the participants and their spouses.

The follow-up questionnaires were concerned with the evolution of the respondents' careers, activity patterns, and personal adjustment.

Retrospective family history given by the participants identified those who had experienced a parental divorce. The level of attachement to each parent as a child was reported by the participants. Ambition was also assessed.

The follow-up questionnaires were concerned with the evolution of the respondents' careers, activity patterns, and personal adjustment.

The information collected covered development of personality and temperament, and included an elaborate study of marital relationships.

Ambition was reported by the participant and a parent. Information was also collected about educational attainment, educational prestige, occupation prestige and income. Information on personality was collected again and covered the participants' conscientiousness, extraversion and neuroticism. Finally, self-reported alcohol problem was assessed.

The follow-up questionnaires were concerned with the evolution of the respondents' careers, activity patterns, and personal adjustment.

The 1945 follow-up focused on the effects of the WWII military effort on the participants.

Information was also collected about occupation prestige and income.

The follow-up questionnaires were concerned with the evolution of the respondents' careers, activity patterns, and personal adjustment.

The information collected covered development of personality and temperament, and included an elaborate study of marital relationships. Also, a lengthy biographical data questionnaire was added.

Information was also collected about educational attainment, educational prestige, occupation prestige and income. Self-reported alcohol problem was also assessed.

The follow-up questionnaires were concerned with the evolution of the respondents' careers, activity patterns, and personal adjustment.

The 1955 follow-up was more modest. It included information on occupation prestige and income.

The follow-up questionnaires were concerned with the evolution of the respondents' careers, activity patterns, and personal adjustment.

The 1960 follow-up was more modest. In included information on occupation prestige and income. Self-reported alcohol problem was also assessed.

The information collected was oriented to problems of aging, such as life satisfactions, retirement, living arrangements, and health and vitality.

Participants were asked to report their satisfaction with 5 domains of life: occupation, family life, leisure activities, health and joy in living. Vitality was assessed by self-rated energy and happiness. Occupational success, retirement status, income level, self-reported physical health, self-reported emotional health and marital status were also collected.

The information collected was oriented to problems of aging, such as life satisfactions, retirement, living arrangements, and health and vitality.

Family engagement was calculated with communication with offspring, communication with siblings and time with relatives. Civic involvement was assessed by the sum of 9 items: participation in service, community, professional, religious, political, social, educational, recreational, and miscellaneous organizations.

The information collected was oriented to problems of aging, such as life satisfactions, retirement, living arrangements, and health and vitality.

Longevity was assessed by contacting the participants and recording wether the participant was still living.

The information collected was oriented to problems of aging, such as life satisfactions, retirement, living arrangements, and health and vitality.

The data collected in 1986 included questions about changes in well-being, time use, importance of religion, perspectives on life accomplishments, changes in family relationships, concerns and goals.

The information collected was oriented to problems of aging, such as life satisfactions, retirement, living arrangements, and health and vitality.