When conducting a research study using a convenience sample of all first grade students from two classrooms in a nearby school,the nurse researcher may increase the sample control by:
A) assigning one classroom to the experimental group and the other classroom to the control group.
B) exposing all subjects to the treatment variable and then comparing the outcome data to pretreatment data.
C) randomly assigning students from both classrooms to either the experimental group or the control group.
D) using all of these subjects as treatment subjects and comparing outcomes to a group of subjects from a similar study.

Question

Quizplus · Accepted Answer

Randomly assigning students from both classrooms to either the experimental group or the control group would increase the sample control. This method would help ensure that both groups are similar in terms of potential confounding variables, such as age and gender, which would increase the internal validity of the study. Assigning one classroom to the experimental group and the other to the control group could potentially introduce bias if there are differences between the two classrooms that could affect the study outcomes. Exposing all subjects to the treatment variable and comparing outcomes to pretreatment data would not increase sample control as there is no comparison group. Using all of these subjects as treatment subjects and comparing outcomes to a group of subjects from a similar study would also not increase sample control, as the control group would not be randomly assigned and could introduce bias.

When Conducting a Research Study Using a Convenience Sample of All