Construction, Reliability, & Validity Of Testing Methods

Dr. Crawford believes she has invented a pill to help with student memorization. For a trial experiment, she gathered two groups of twenty students. She gave the twenty students in Group A the “smart pill”, and the twenty students in Group B a sugar pill. After waiting five minutes, both groups of students were given a list of forty words, and were instructed to memorize the entire list in any order. The students were given five minutes to memorize the list. The students were then asked to verbally recite all of the words they could remember in any order within three minutes. Group A recited an average of fifteen words, while Group B recited an average of ten words. In this experiment, what is the independent variable?

Dr. Crawford believes she has invented a pill to help with student memorization. For a trial experiment, she gathered two groups of twenty students. She gave the twenty students in Group A the “smart pill”, and the twenty students in Group B a sugar pill. After waiting five minutes, both groups of students were given a list of forty words, and were instructed to memorize the entire list in any order. The students were given five minutes to memorize the list. The students were then asked to verbally recite all of the words they could remember in any order within three minutes. Group A recited an average of fifteen words, while Group B recited an average of ten words. What sort of experimental design is this?

Dr. Crawford believes she has invented a pill to help with student memorization. For a trial experiment, she gathered two groups of twenty students. She gave the twenty students in Group A the “smart pill”, and the twenty students in Group B a sugar pill. After waiting five minutes, both groups of students were given a list of forty words, and were instructed to memorize the entire list in any order. The students were given five minutes to memorize the list. The students were then asked to verbally recite all of the words they could remember in any order within three minutes. Group A recited an average of fifteen words, while Group B recited an average of ten words. What is Dr. Smart’s null hypothesis?

Which of the following is not a common difficulty associated with the double-blind study protocol?

Melanie is a regular customer at a gun range, where she shoots paper targets with three different types of guns: a rifle, a pistol, and a shotgun. When firing the rifle, Melanie notices that her shots nearly always hit the target, but are evenly spread out throughout the paper"s surface. When firing the pistol, Melanie"s shots are all grouped within a few inches of each other, with the group overlaying the bull’s-eye on the target. When firing the shotgun, Melanie"s shots are also tightly grouped, but the groups of shots are all slightly above the bull’s-eye. Which of the following terms is best describes Melanie"s performance with the shotgun compared to her performance with the pistol?

A sample of players on a baseball team are chosen to be drug tested. Which of the following methods could league officials use to ensure that the players are randomly selected?

Dana is participating in a study that asks her to press a red button every time the computer screen in front of her shows a letter X. The computer screen shows a letter "T." Dana presses the red button. Dana"s response is considered to be which of the following?

Dr. Crawford believes she has invented a pill to help with student memorization. For a trial experiment, she gathered two groups of twenty students. She gave the twenty students in Group A the “smart pill”, and the twenty students in Group B a sugar pill. After waiting five minutes, both groups of students were given a list of forty words, and were instructed to memorize the entire list in any order. The students were given five minutes to memorize the list. The students were then asked to verbally recite all of the words they could remember in any order within three minutes. Group A recited an average of fifteen words, while Group B recited an average of ten words. In this experiment, what is the dependent variable?

Dr. Crawford believes she has invented a pill to help with student memorization. For a trial experiment, she gathered two groups of twenty students. She gave the twenty students in Group A the “smart pill”, and the twenty students in Group B a sugar pill. After waiting five minutes, both groups of students were given a list of forty words, and were instructed to memorize the entire list in any order. The students were given five minutes to memorize the list. The students were then asked to verbally recite all of the words they could remember in any order within three minutes.
Group A recited an average of fifteen words, while Group B recited an average of ten words.

Group B is the _________.

Dr. Crawford believes she has invented a pill to help with student memorization. For a trial experiment, she gathered two groups of twenty students. She gave the twenty students in Group A the “smart pill”, and the twenty students in Group B a sugar pill. After waiting five minutes, both groups of students were given a list of forty words, and were instructed to memorize the entire list in any order. The students were given five minutes to memorize the list. The students were then asked to verbally recite all of the words they could remember in any order within three minutes.
Group A recited an average of fifteen words, while Group B recited an average of ten words.

Group A is the __________.