A threat to internal validity occurs only if a potential design confound varies __________ with the independent variable.

Following a farming accident, a patient was heavily exposed to organophosphates. He is wheezing and diaphoretic. Which treatment should be administered first? 

Which of the following is associated with hemolytic uremic syndrome?

The PLASMIC score is an inpatient scoring scale used to determine the probability that a patient has what disease?

An NP’s scope of practice is the full range of practice privileges allowed by certification and licensures. Which of the following statements is most accurate regarding the NP’s scope of practice? 

The AGACNP is considering a specialty in geriatrics. There are distinct differences between gerontology and geriatrics. Which of the following statements appropriately describes this specialty? 

Refer to the research study below to answer questions 26-29. Dr. Math wondered if children learn multiplication better if they are taught by a teacher wearing a shirt depicting a nice cartoon character rather than a shirt depicting a scary cartoon character. He randomly assigned students to one of two classes. In class A, Mr. Jackson wore a SpongeBob (nice character) shirt while teaching multiplication. In class B, Mrs. Samalez wore a Joker (scary character) shirt while teaching multiplication. All students then took a multiplication test. A suspicion probe indicated that students were unaware of the purpose of the study.   What kind of design is this?

Which of the following is a threat to internal validity found in a within-groups design but NOT an independent-groups design?

Refer to the research study below to answer questions 7-12. Dr. Rem studies sleep and sleep disorders. She is curious as to whether falling asleep in front of a television set causes people to fall asleep more slowly than falling asleep without watching TV. She recruits a sample of 60 women and creates three conditions. All participants come to the sleep lab for three nights in a row and experience all three conditions. In the first condition (A), participants fall asleep in front of a television that is off. In the second condition (B), participants fall asleep in front of a television that is turned on to a 24-hour news channel. In the third condition (C), participants fall asleep in front of a television that is turned on to the same 24-hour news channel but is muted. Participants sleep in the same bed each night. With the use of an electroencephalograph (EEG; a physiological measure that measures electrical activity in the brain), the researcher measures how long it takes participants to fall asleep each night.   What kind of research design is this?

Which type of research design can be used to make causal inferences with the highest level of certainty?