A headline at MSNBC.com stated “One way to ward off Alzheimer’s: Take a hike. Study: Walking at least one mile a day reduces risk of cognitive impairment by half.” The article reports on a study showing that elderly people who walked a lot tended to have more brain mass after nine years and were less likely to develop dementia that can lead to Alzheimer’s disease than subjects who walked less. At the start of the study the researchers measured the walking habits of the elderly subjects and then followed up with measures of brain volume nine years later. Assuming that active walkers really did have more brain mass and fewer dementia symptoms, is the headline justified? Answer this question thoroughly using some of the terminology and vocabulary that we learned while study Chapter 1 of our textbook. (You might think about terms such as random sampling, random assignment, observational study, experiment, cause and effect, and confounding variable. Some of those words will be useful to describe what is going on.)
A headline at MSNBC.com stated “One way to ward off Alzheimer’s: Take a hike. Study: Walking at least one mile a day reduces risk of cognitive impairment by half.”
The article reports on a study showing that elderly people who walked a lot tended to have more brain mass after nine years and were less likely to develop dementia that can lead to Alzheimer’s disease than subjects who walked less.
At the start of the study the researchers measured the walking habits of the elderly subjects and then followed up with measures of brain volume nine years later.
Assuming that active walkers really did have more brain mass and fewer dementia symptoms, is the headline justified? Answer this question thoroughly using some of the terminology and vocabulary that we learned while study Chapter 1 of our textbook. (You might think about terms such as random sampling, random assignment, observational study, experiment, cause and effect, and confounding variable. Some of those words will be useful to describe what is going on.)
Given a headline at MSNBC.com stated “One way to ward off Alzheimer’s: Take a hike. Study: Walking at least one mile a day reduces the risk of cognitive impairment by half.”
We have to assume that active walkers did have more brain mass and fewer dementia symptoms, is the headline justified
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