Finding the Control Group
This group is compared to the other groups as the one that does not get the change or independent variable.
What is control group?
The variable that is manipulated and changed in the experiment.
What is the independent variable.
The variable that you intend to measure.
What is the dependent variable?
A study was done to find if different tire treads affect the braking distance of a car. What is the independent variable?
What are different tire treads?
You decide you want to compare which music makes you fall asleep faster. Week 1 you listen to rock music. Week 2 you listen to country music. Week 3 you listen to classical music. Week 4 you listen to no music.
What is week 4
Is the size of fish affected by the depth of the ocean they live? What would be the IV?
What is depth of ocean.
A group of scientists test the behavior that women find men without earrings more attractive than men with earrings. What is the IV?
Men wearing earrings.
The height of bean plants depends on the amount of water they receive. What is the dependent variable?
What is the height of the plant?
Bart believes that mice exposed to radio waves will become extra strong. He has two groups of ten mice. He places group A near a radio for 5 hours and group B in an area not exposed to radio waves. To test the hypothesis he placed a wood block to block the door to the mice food.
What is group B?
Is photosynthesis production of starch faster when plants are exposed to different amounts of light? What would be the DV?
What is amount of starch produced.
Children who entered kindergarten at age 5 were compared with children who entered kindergarten at age 6 on measures of academic achievement taken at grade 5. Results indicate that children who entered kindergarten at age 6 scored higher on standardized tests than those kids that entered at age 5. What is the DV?
What is score on standardized test.
The higher the temperature of the air in the oven, the faster a cake will bake. What is the dependent variable?
What is how fast the cake will bake?
Pea plant clones are giving different amounts of water for three-week period. The first pea plant receives 400 milliliters a day. The second pea plant receives 200 milliliters a day. The third pea plant receives 100 milliliters a day. The fourth pea plant does not receive any extra water: the plant only receives natural ways of receiving water. The heights of the pea plants are recorded daily.
What is the pea plant with no water.
Spending time with a pet animal decreases the amount of stress right before taking a test. What is the dependent variable??
What is the amount of stress.
A researcher wants to investigate the types of social behavior that develops in children in day care depending on the amount of time the child spend in day care. What is the DV?
What is social behavior in children?
An investigation found that more bushels of potatoes were produced when the soil was fertilized more. What is the control group?
What is no fertilizer?
One tank of goldfish is fed the normal amount which is once a day; a second tank is fed twice a day; and a third tank is fed four times a day during a six-week study. The fishes’ body fat is recorded daily.
What is tank 1?
Students at a University were split into two groups and each received a different text for a philosophy course. Once group received a traditional text book, while the other received an interactive textbook on a tablet computer. After the course, the final exam marks between the two groups of students was compared. What is the independent variable?
What is media type of textbook?
Three redwood trees are kept at different humidity levels inside a greenhouse for 12 weeks. One tree is left outside in normal conditions. The heights of the trees are measured once a week. IV?
What are different humidity levels?
A student wanted to test how the mass of a paper airplane affected the distance it would fly. Paper clips were added before each test flight. As each paper clip was added, the plane was tested to determine how far it would fly. What is the control group?
What is no paper clips?