Question

Dr. Galton has developed a new drug called Smartex, which should make people smarter. In order...

Dr. Galton has developed a new drug called Smartex, which should make people smarter. In order to test Smartex, Dr. Galton took 100 individuals and divided them into two groups. Prior to the manipulation, all participants took an IQ test. Half of the participants were then given Smartex every day for 12 months, while the other participants were given a placebo. After 12 months, both groups were then given another IQ test to evaluate their intelligence.

1. What is (are) the DV(s)?

2. What is (are) the IV(s) and the levels?

3. How is (are) the IV(s) manipulated?

4. What is the overall design of the experiment?

Math   Statistics-And-Probability   
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Answer #1

1.

The DV is participants IQ level.

2.

The IV is drug taken by participants. The levels of IV are Smartex drug and placebo.

3.

The IV(s) are manipulated by giving Smartex drug to half of the participants and placebo to remaining half of the participants.

4.

This is a single factor (IV) study. In the study the treatment was deliberately imposed randomly on the participants in order to observe a possible change in the IQ level. Thus, this is a single factor experimental design or a randomized design.

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