A researcher investigates that fast food spending habits of teenagers at a local

Question

A researcher investigates that fast food spending habits of teenagers at a local ruaral high school with 150 students. The researcher develops a survey, collects the necessary dat analyzes the data and quickly realizes the findings can only be compared to other similarly sized rural high schools with demographics similiar to the one studie. The researcher, however decides to generalize finding to larger schools and regions. Which type of threat to the research design has occured? 1) internal validity, 2) Internal reliability 3) external validity 4) External reliability.

Explanation / Answer

External validity is the validity of generalized (causal) inferences in scientific research, usually based on experiments as experimental validity. In other words, it is the extent to which the results of a study can be generalized to other situations and to other people

so ans wer is option 3

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