Here are a couple of ambiguous causal arrows:
http://www.msnbc.msn.com/id/32188496/ns/health-aging (not retiring yields 
better health)
http://www.msnbc.msn.com/id/30806621/ns/health-aging/ (postponing retirement 
delays dementia - 6 weeks/year)
and the odd one that refutes one ambiguous arrow to replace it with another:
http://www.msnbc.msn.com/id/29260646/ns/health-aging/
"These marketed products don't confer any additional benefit over and above 
being socially and intellectually active in one's normal daily life," Dr. Peter 
J. Snyder of Lifespan Affiliated Hospitals in Providence, Rhode Island, told 
Reuters Health. "There are some things that we could be doing that have much 
more rigorous data to support their application."
Sigh.
Tim
_______________________________
Timothy O. Shearon, PhD
Professor and Chair Department of Psychology
The College of Idaho
Caldwell, ID 83605
email: [email protected]

teaching: intro to neuropsychology; psychopharmacology; general; history and 
systems

"You can't teach an old dogma new tricks." Dorothy Parker


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