The term "internal validity" refers to the degree to which the:
a. groups in the sample were equivalent before beginning the study.
b. independent variable can be interpreted as being responsible for the effects on the dependent variable.
c. researchers followed the design they selected for the study.
d. results of the study can be generalized to groups other than the one in the study.
ANS: B
In studies of causality, internal validity pertains to whether the effect found in the study may have been caused by a third, often unmeasured, extraneous variable rather than by the treatment.
Internal validity does not mean the groups were equivalent.
Following the design selected for the study represents the integrity of the study.
External validity concerns the ability of the results of the study can be generalized to groups other than the one in the study.
You might also like to view...
A primigravida in her first trimester is Rh negative. What will this woman receive to prevent anti-Rh antibodies from forming?
a. Rh immune globulin during labor b. Intrauterine transfusions with O-negative blood c. Rh immune globulin at 28 weeks and within 72 hours after the birth of an Rh-positive infant d. Rh immune globulin now and again in the last trimester
An older male adult who had a gastric resection states that he wants to ambulate but the osteoarthritis (OA) in his knees causes too much pain. Which intervention should the nurse implement to increase the amount of walking this man performs?
a. Encourage pain medication around-the-clock. b. Instruct him to rest until the pain disappears. c. Suggest taking pain medication before walking. d. Collaborate with health care provider to provide a walker.
The patient with a peptic ulcer has been placed on regular doses of bismuth salicylate (Pepto-Bismol) to combat H. pylori. What color will this drug turn the stool?
a. Gray-black b. Dark green c. Red-orange d. Yellow
A client is admitted on an emergent basis to a local mental health facility after being detained by the police when he was found walking naked down the middle of a four-lane highway
The nurse knows that the client can be held for what length of time? A) 72–84 hours B) 48–72 hours C) 36–48 hours D) 24–36 hours