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Need a Favor? Talk To My Right Ear
Hugh Pickens writes "The Telegraph reports that scientists have found that if you want to get someone to do something, ask them in their right ear. Known as the 'right ear advantage,' scientists believe it is because information received through the right ear is processed by the left hand side of the brain which is more logical and better at deciphering verbal information than the right side of the brain. 'Talk into the right ear you send your words into a slightly more amenable part of the brain,' say researchers. The team, led by Dr. Luca Tommasi and Daniele Marzoli from the University of Chieti in central Italy, observed the behavior of hundreds of people in three nightclubs across the city where they intentionally addressed 176 people in either their right or their left ear when asking for a cigarette. They obtained significantly more cigarettes when they made their request in a person's right ear compared with their left. 'These results seem to be consistent with the hypothesized specialization of right and left hemispheres,' say researchers. 'We can also see this tendency when people use the phone, most will naturally hold it to their right ear.'"
...and I thought it was because I was right-handed!
This article suggests that the experiments were conducted by the very people who were proposing the hypothesis. That's not very scientific - this should have been double blind. Any number of factors can effect the success rate of getting the cigarettes - including if the researchers believed they were likely to be more successful.
-- Sorry, I can't think of anything funny to say here.
Generally 176 is a sufficiently large sample for statistical purposes. There are methods to calculate how likely it is that the observed differences weren't just random luck. In other words, you can calculate the chance of getting the observed results when there is no real difference. When this chance (called a p-value) is low (one common significance level is 5%), you can conclude that it wasn't just luck and another factor was at work.
More stuff: http://en.wikipedia.org/wiki/Hypothesis_test
Ugg, how is it that the parent is modded down but the GP is modded insightful? The GP is basically just saying "well, that doesn't feel like enough to me", while the parent points out accurately that it very easy to determine what the probability is that the results are due to chance. Since the article states that the researchers obtained "significantly" more cigarettes, I'm assuming that this is at least based on the common level of 5%. You can have a small sample size that is highly statistically significant if the skew is large enough. Unfortunately, even on slashdot, most people don't understand statistics.
That said, hypothesis testing just determines the probability that the results are NOT due to chance. Thus, it's totally possible that the results are due to something different that what the researchers propose - maybe they were just friendlier when asking from the right side.
"Talk to the hand"
Right or left hand?
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Actually, if you're a female, it doesn't matter which ear you talk into as long as you press your breasts into my arm when you make the request.
I laughed at the weak who considered themselves good because they lacked claws.