For each of the testing situations listed, identify the dependent and independen
ID: 3351100 • Letter: F
Question
For each of the testing situations listed, identify the dependent and independent variables
Example: Attempting to test the effect of caffeine on reaction time, one group of subjects takes caffeine and another group does not. Neither group knows which one is getting caffeine (blind study). Then, all subjects have their reaction times tested.
Answer: The dependent variable is time and the independent variable is related to whether the subject gets caffeine or not.
1. You want to look at the effect of using computer-based instruction on student achievement. You give one group of students the computer course and another group the traditional, teacher-oriented course. Then you test both groups with a final exam.
2. A researcher is interested in exercise routines and moods. One group of subjects is put into a bad mood by reading negative comments. Another group is put into a good mood by reading positive comments. A third group is put into a neutral mood by reading neutral comments. All subjects then go through an exercise test that measures the VO2 max.
3. A track coach wants to know if there is a positive effect on his field athletes when they know the physics behind projectile motion. He takes half the discus throwers and teaches them the biomechanics of projectiles and their motion. The other half of the discus throwers do not receive the biomechanics teaching. He then has them throw the discus.
4. A physician and researcher wants to know if a new drug can thin the blood better than aspirin. She uses one group of 20 people and gives them aspirin. She takes another group of 20 people and gives them the new drug. She does not tell either group which one is receiving the new drug. She then measures the thickness of the blood.
5. A bowling instructor wants to know if bowling by pin location or bowling by spot location is the better method for teaching beginners. She has one class learn by aiming at the pins and she has another class learn by aiming at spots on the floor. Then she has both classes bowl three games.
Explanation / Answer
Answer
Here for the given statement we are identifying the dependent and independent variables
1. You want to look at the effect of using computer-based instruction on student achievement. You give one group of students the computer course and another group the traditional, teacher-oriented course. Then you test both groups with a final exam.
Here the independent variable is related to whether the student gets computer based instruction or not and the dependet variable is the score of final exam (a representative of student achievement)
2. A researcher is interested in exercise routines and moods. One group of subjects is put into a bad mood by reading negative comments. Another group is put into a good mood by reading positive comments. A third group is put into a neutral mood by reading neutral comments. All subjects then go through an exercise test that measures the VO2 max.
Here the independent variable is related to whether the subject is put into bad mood or good mood or neutral mood and the dependent variable is measurement of VO2 max.
3. A track coach wants to know if there is a positive effect on his field athletes when they know the physics behind projectile motion. He takes half the discus throwers and teaches them the biomechanics of projectiles and their motion. The other half of the discus throwers do not receive the biomechanics teaching. He then has them throw the discus.
Here the independent variable is related to whether the athlete knows the biomechanics or not and the dependent variable is the distance covered by throwing discus.
4. A physician and researcher wants to know if a new drug can thin the blood better than aspirin. She uses one group of 20 people and gives them aspirin. She takes another group of 20 people and gives them the new drug. She does not tell either group which one is receiving the new drug. She then measures the thickness of the blood.
Here the independent variable is related to whether the patient/subject has new drug or aspirin and the dependent variable is the measurement of thickness of the blood.
5. A bowling instructor wants to know if bowling by pin location or bowling by spot location is the better method for teaching beginners. She has one class learn by aiming at the pins and she has another class learn by aiming at spots on the floor. Then she has both classes bowl three games.
Here the independent variable is related to whether the class learn by aiming at the pins or by aiming at spots on the floor and the dependent variable is result of three games of each class.
Hence the answer.............
Thank you.............
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