(15 pts) A cognitive psychologist would like to evaluate the claim that the omega-3 fatty acids can help improve memory in normal adult humans.One group of participants is given a large dose of fish extract containing the Omega-3 (500 mg), and a second group is given a placebo containing no Omega-3 (0 mg).The researcher asks each participant to read the front page of a local newspaper thoroughly every morning and to take their prescribed dosage (of either Omega-3 or placebo) immediately afterwards.The researcher gives each participant a memory test at the end of two weeks and records how many news items each participant remembers from the past three weeks of news. Answer the following:

A)What is the independent variable?

B)What is the dependent variable?

C)Is the dependent variable discrete or continuous?

D)What scale of measurement (nominal, ordinal, interval or ratio) is used to measure the dependent variable?

E)What research method is being used (experimental or observational), and why?

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