For each of the following hypotheses, identify the independent and dependent variables, give an operational definition for each, and decide what research strategy (cross-sectional, longitudinal or sequential), type of design (experimental or non-experimental) and method of data collection (observational, individual testing, survey or questionnaire) you would use to test each hypothesis.

1. infants cared for in a home setting are more content.

independent variable: definition:
dependent variable: definition:
research strategy:
type of design: collection:

2. adolescents raised in rural settings are less likely to get involved with drugs and violence.

independent variable: definition:
dependent variable: definition:
research strategy:
type of design: collection:

3. the importance of friendships diminishes as one ages.

independent variable: definition:
dependent variable: definition:
research strategy:
type of design: collection:

4. only children are more self-centered than children with siblings.

independent variable: definition:
dependent variable: definition:
research strategy:
type of design: collection:

5. children who learn to use a computer will be better students in school.

independent variable: definition:
dependent variable: definition:
research strategy:
type of design: collection:

6. adults who enjoy their work will live longer.
independent variable: definition:
dependent variable: definition:
research strategy:
type of design: collection:

7. older people with close family relationships will remain healthier.
independent variable: definition:
dependent variable: definition:
research strategy:
type of design: collection: