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.This is a threat to
A) construct validity.
B) external validity.
C) internal validity.
D) statistical conclusion validity.

Question

Quizplus · Accepted Answer

External validity is concerned with the extent to which findings can be generalized beyond the study sample.Construct validity is concerned with the fit between conceptual and operational variables and requires adequate conceptual and operational definitions.Internal validity looks at the influence of extraneous variables on study outcomes.Statistical conclusion validity is concerned with whether the conclusions based on statistical analyses are an accurate reflection of the real world.

A Researcher Conducts a Quasi-Experimental Study to Determine Whether There