In a quasi-experimental study using a convenience sample of subjects from a local high school,the researcher asks potential subjects to volunteer for placement in either a "low sugar" diet program or a "regular sugar" diet program.This technique for assigning participation may compromise
A) construct validity.
B) external validity.
C) internal validity.
D) statistical conclusion validity.

Question

Quizplus · Accepted Answer

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

In a Quasi-Experimental Study Using a Convenience Sample of Subjects