Variables Assignment (1)

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Florida State College at Jacksonville *

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2012

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Psychology

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Dec 6, 2023

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Uploaded by hochki13

Variables Assignment PSY2012 Identify the independent and dependent variables, as well as constants in the sentences below. 1. The time it takes to run a mile depends on the person’s running speed. I: Running Speed D: Time it takes C: Mile 2. The height of bean plants depends on the amount of water they receive. I: Amount of water D: Height of the bean plant C: Plant 3. The higher the temperature of the air in the oven, the faster a cake will bake. I: Temperature of the air D: Time it takes cake to bake C: Cake 4. The amount of pollution produced by cars was measured for cars using gasoline containing different amounts of lead. I: Different amounts of lead D: Population increases C: Type of car 5. Four groups of rats are first massed and then fed identical diets except for the amount of vitamin A they receive. Each group gets a different amount. After 3 weeks on the diet, the rats’ masses are measured again to see if there has been a decrease. I: Amount of vitamin A D: Mass C: Diet For each experiment below, specify the independent variable, dependent variable, control group and any constants. 1. Two groups of students were tested to compare their speed working math problems. Each group was given the same problems. One group used calculators and the other group computed without calculators. Independent variable: Use of calculators. Dependent variable: How fast students worked math problem. Control: Group not using calculators.

Constant: Same math problem 2. Students of different ages were given the same puzzle to assemble. The puzzle assembly time was measured. Independent variable: Age of student. Dependent variable: How fast puzzle is assembled. Constant: Same puzzle There can be several controlled variables. If an experiment is to be useful, only one variable at a time can be manipulated intentionally. All other variables must be controlled throughout all parts of the experiment. If more than one variable is altered (changed), the results of an experiment cannot be interpreted with any validity. 3. An experiment was performed to determine how the amount of coffee grounds could affect the taste of coffee. The same kind of coffee, the same percolator, the same amount and type of water, the same perking time, and the same electrical sources were used. Independent variable: Amount of coffee used. Dependent variable: Taste of coffee. Constants (3): Type of coffee, type of water, time of percolation, amount of water, percolator used, electrical source John thinks that a special juice will increase the productivity of workers. He creates two groups of 100 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, John counts how many stacks of papers each group has made. Group A made 1,247 stacks; Group B made 2,385 stacks. Identify the: 1. Control Group: Group B 2. Independent Variable: Amount of juice given to workers. 3. Dependent Variable: Productivity of workers. 4. What should John's conclusion be? The special drink seems to decrease productivity.

5. How could this experiment be improved? Reduce the amount of special juice that is given to workers.

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