A researcher develops a new instrument to measure coping skills and conducts a pilot study to compare the new tool with an existing tool that measures this concept.	C. Convergent validity
A researcher conducts a quasi-experimental study to determine whether there is improved weight gain among premature infants who are fed according to cue-based protocols. The researcher trained neonatal intensive care nurses to apply cue-based feeding to orally fed infants and notes a statistical difference in weight gain between infants fed according to cue-based protocols and those fed according to standard protocols. The reviewer notes that parents who gave consent to participate in the study were from a higher socioeconomic class than the population as a whole. This is a threat to	B. Mono- operation bias
A researcher uses only one method of measurement to assess depression in older adults living in an assisted living facility.	D. Internal consistency reliability
A researcher evaluates scores of a paper and pencil instrument with variables at the interval level of data using the Cronbach's alpha coefficient statistical procedure.	A. External validity