| Research Design: |
Project on Human Development in Chicago
Neighborhoods
The city of Chicago was selected as the research site for the PHDCN
because of its extensive racial, ethnic, and social-class diversity.
The project collapsed 847 census tracts in the city of Chicago into
343 neighborhood clusters (NCs) based upon seven groupings of
racial/ethnic composition and three levels of socioeconomic status.
The NCs were designed to be ecologically meaningful. They were
composed of geographically contiguous census tracts, and geographic
boundaries and knowledge of Chicago's neighborhoods were considered in
the definition of the NCs. Each NC was comprised of approximately
8,000 people.
Longitudinal Cohort Study
For the Longitudinal Cohort Study, a stratified probability sample
of 80 neighborhoods was selected. The 80 NCs were sampled from the 21
strata (seven racial/ethnic groups by three socioeconomic levels) with
the goal of representing the 21 cells as equally as possible to
eliminate the confounding between racial/ethnic mix and socioeconomic
status. Once the 80 NCs were chosen, then block groups were selected
at random within each of the sample neighborhoods. A complete listing
of dwelling units was collected for all sampled block groups.
Pregnant women, children, and young adults in seven age cohorts
(birth, 3, 6, 9, 12, 15, and 18 years) were identified through
in-person screening of approximately 40,000 dwelling units within the
80 NCs. The screening response rate was 80 percent. Children within
six months of the birthday that qualified them for the sample were
selected for inclusion in the Longitudinal Cohort Study. A total of
8,347 participants were identified through the screening. Of the
eligible study participants, 6,228 were interviewed.
For all cohorts except 0 and 18, primary caregivers as well as the
child were interviewed. The primary caregiver was the person found to
spend the most time taking care of the child. Separate research
assistants administered the primary caregiver interviews and the child
interviews. The primary method of data collection was face-to-face
interviewing, although participants who refused to complete the
personal interview were administered a phone interview. Interviews
were conducted in Spanish, English, and Polish. In Wave 1 the complete
protocol was translated into Spanish and Polish. An interpreter was
hired for participants who spoke a language other than English,
Spanish, or Polish. Depending on the age and wave of data collection,
participants were paid between $5 and $20 per interview. Other
incentives, such as free passes to museums, the aquarium, and monthly
drawing prizes were also included.
Interview protocols included a wide range of questions. For
example, some questions assessed impulse control and sensation-seeking
traits, cognitive and language development, leisure activities,
delinquency and substance abuse, friends' activities, and
self-perception, attitudes, and values. Caregivers were also
interviewed about family structure, parent characteristics,
parent-child relationships, parent discipline styles, family mental
health, and family history of criminal behavior and drug use.
Family Structure and Health History
Administered between 1994 and 1997, the Family Structure and Health
History instrument was completed by either the primary caregivers
(PCs) of subjects belonging to Cohorts 0 to 15, or by the subjects
belonging to Cohort 18 of the PHDCN Longitudinal Cohort Study. The
instrument obtained information regarding the subject's family
structure, such as the female and/or male PC's relationship to the
subject (e.g., biological, foster, or step), whether the subject's
biological parents were living or deceased, the amount of time the
subject's biological mother and father spent with the subject since
being born, number of siblings the subject had, their ages, whether
they were living or deceased, and cause of death. Information could be
repeated for up to seven mentions of a brother and seven mentions of a
sister. PCs were also asked to provide gender and marital status
information for any of their past relationships (up to seven
mentions). Information was collected on household composition by
asking the respondent to provide the relation (e.g., biological,
nonbiological, maternal, paternal, or parent, sibling, aunt, uncle,
grandparent, or other) for all individuals living in his or her
home. Information for 12 possible individuals could have been listed
for this part. Finally, the instrument was used to obtain information
on family health history. Respondents were asked to list all family
members (up to approximately 16 mentions) who had a history of
diabetes, high blood pressure, heart problems, stroke, cancer, asthma,
chronic bronchitis or emphysema, and other unmentioned chronic health
problems. |
