The nurse researcher designed a study examining anxiety among elementary school children
If a widely publicized murder of a child occurred in the city during the time frame of the study, what type of threat to internal validity would the murder represent?
a. Maturation
b. Instrumentation
c. Selection bias
d. Historical
ANS: D
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A Maturation represents developmental, biological, or psychological processes within individuals occurring or changing as a function of time.
B Instrumentation threats refer to changes in the measurement of variables or observational techniques that may change obtained measurement.
C Selection bias occurs when precautions are not used to obtain a representative sample.
D The murder would represent a historical event threatening internal validity.
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