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A researcher introduces a new phonics program in one preschool and uses a neighboring preschool as a no-treatment control group. After the program is in place for one academic year, the researcher intends to evaluate the reading skills of the students in both preschools and then compare their scores. This research cannot be classified as a true experiment because ____.

A newspaper article discussing someone’s research is an example of a ____ source.

Milgram’s obedience study is ethically questionable because the ____.

The purpose of the descriptive research strategy is to describe the relationship between two variables.

A researcher would like to examine the political attitudes for students at a local university. The researcher will evaluate a sample of 200 students but would like to be sure that the ages and genders of individuals in the sample accurately represent the ages and genders for the entire student body at the university. What would be the best sampling method for the researcher to use?

The Tuskegee study involved ____.

A large sample is generally more representative than a small sample.

A researcher decides not to report the data from three participants whose results contradicted the researcher’s hypothesis. This is an example of fraud.

A refutable hypothesis must ____.

Based on observations of his own children, Jean Piaget formed a theory about the cognitive development of all children. This is an example of ____ reasoning.