Exam 15: Natural and Quasi Experiments

An evaluator was hired after a homeless shelter started offering assistance with applying for food stamps .She compared the daily caloric intake of the homeless at that shelter and a nearby shelter not offering application assistance .This study uses

The effect of adding fluoride to a community's water supply was tested by comparing annual records of cavities per patient in local dentists' offices for six years before and four years after the fluoride was addeD .This is an example of which type of research?

A study using the General Social Survey tested whether individuals who are members of a club report greater life satisfaction .What type of research design is this?

______ tend to have stronger generalizability, whereas _____ tend to provide stronger evidence of causation.

A criminal justice professor compared crime rates in cities where police departments adopted performance measurement systems to those that did not, both before and after the systems were implementeD .This type of research is called

A school compared the grades of students with disabilities while they were in separate classrooms and a year later when the state required integrating these students into mainstream classrooms .What type of research is this?

Researchers studied the labor market in Miami before and after the Mariel Boatlift in 1980, during which a large influx of Cubans arrived in Miami looking for jobs .The shock of the Mariel Boatlift on the local labor supply was exogenous to wages in Miami .This is an example of a(n)

A state set a minimum grade point average requirement for students receiving financial aid starting in 2005 .A researcher compared college graduation rates before and after 2005 in both that state and other states in the region .This type of research is

Researchers used a flip of the coin to assign participants to view either a one-minute public information video about the environment or a control video of the same duration that showed only highlights of entertainment news .The researchers then observed how many participants in each group deposited small water bottles (which they had been given at the outset) into the recycle bin as opposed to an adjacent trash bin .This research involves a(n)

Students in a school system with scores below 70 on a diagnostic test are required to attend an early morning math program .At the end of the year, researchers compared the math grades for these students with those of students who scored 70 or above on the initial diagnostic test, controlling statistically for diagnostic test score .This type of research uses