Science and Society
The Latest Developments in Science and Technology

Ned Potter is the science correspondent for ABC's "World News with Charles Gibson." He has reported on such topics as space exploration, the human genome and climate change.

November 2009
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30          

« Previous | Main | Next »

Clean Body, Clean Mind?

December 05, 2008 10:39 AM

Columnist Lee Dye reports:

Maybe what the world really needs is a hot, sudsy bath.

Researchers in Great Britain have found that even just washing your hands may make you less harsh in your judgment of others. Their study, published in the journal Psychological Science, asserts that feeling clean can "reduce the perceived seriousness of moral transgressions."

The study, authored by psychologist Simone Schnall and two colleagues at the University of Plymouth, revealed that after washing their hands with soap and water, participants in one experiment judged unethical behavior more acceptable than participants who did not wash their hands.

That's a good thing, in the sense that more tolerance could make it easier for all of us to live together on this crowded planet. But it could be a bad thing in that cleanliness might make us more prepared to accept injustices and wrongdoing.

One reviewer called it "terrifying" that simply washing your hands might make you blink in the face of evil. The researchers conclude that "cleanliness might indeed feel as if it were next to godliness" because it reflects a human desire to become "physically and morally pure." But the findings also suggest that our decisions on ethical conduct may be a bit shaky.

"Although we like to think that we arrive at decisions on right and wrong based on rational thinking, it's often incidental feelings that drive the judgment," Schnall said in an e-mail.

The findings build on earlier research by Schnall, as well as a number of other psychologists, into the role of disgust in shaping our opinions on morality.

"In earlier work we showed that when feeling disgusted, as a consequence of being exposed to a foul smell, or sitting at a dirty desk, people find moral transgressions more wrong than when they are in a neutral mood," she said. "It's as if they conclude 'that's disgusting' when asked to consider how wrong it is to falsify information on one's resume, when in fact the foul smell, or dirty desk made them feel disgusted. Now, we showed the reverse. When feeling clean, or entertaining thoughts related to cleanliness, people conclude that a behavior (such as falsifying a resume) is 'clean.'

The two experiments on 84 students were designed to first make them really disgusted, and thus inclined to be more negative in their judgments. In both experiments the students watched a repulsive 3-minute film clip from the Scottish film about heroin addicts, "Trainspotting." Without going into details, the episode involves a filthy toilet, and it is really disgusting.

The participants were asked to rate six moral dilemmas on a scale of zero (perfectly OK) to nine (extremely wrong.) The hypothetical situations included eating one's dead dog, switching the tracks of a trolley to kill one workman instead of five, keeping money inside a found wallet, killing a terminally ill plane crash survivor to avoid starvation, putting false information on a resume, and using a kitten for sexual arousal.

In one of the two experiments, "only half of the participants were given the chance to wash their hands, as if to 'wash away' their feelings of disgust following the film," Schnall said. The participants were told they needed to wash their hands because the room was used by the faculty and needed to be kept extra clean.  "Participants who washed their hands found moral transgression to be less bad than participants who had not washed their hands."

The difference was called "substantial" in the study. 

Although it's not entirely clear exactly what happened to the kitten, it must have been pretty bad because it was judged the most repugnant of all six dilemmas. Even eating one's dead dog faired better, and only one of the scenarios posed little problem for the participants. Most saw little wrong with diverting a trolley to kill one man instead of five.

Similar results were obtained in another experiment which asked the participants to unscramble sentences consisting of 40 sets of four words each. Half of the participants received some words associated with cleanliness (pure, immaculate, pristine, etc.) and half received only neutral words.

Simply thinking about cleanliness had a significant effect. Students who had only neutral words judged the abuse of the kitten as extremely wrong (8.25 on a scale of zero to 9.) The students who had words suggesting cleanliness judged it at 6.70.

"In both experiments, the effect of the rather subtle manipulations was substantial, with medium to large effect sizes," the study concluded.

The study involved only college students -- the so-called convenience sample because they are handy and willing to cooperate.  And it was a fairly small study, as are most original studies on the difficult subject of human behavior.

Assuming the findings are correct, the study does not address the question of whether we are conditioned by culture to equate cleanliness to godliness, or whether it is innate -- just a fundamental part of what it means to be human.

"It seems that across different cultures, people equate physical cleanliness and purity with moral and spiritual purity," Schnall said. "Although it's too early to say based on the present evidence, it appears that people have an innate intuition that purity cuts across the physical and moral domains."

So, a hot bath may be a spiritual journey, leaving us more tolerant of those who would mess up our lives.

December 5, 2008 | Permalink | Share | User Comments (20)

User Comments

Feed You can follow this conversation by subscribing to the comment feed for this post.

Social Science research at its worst. This kind of study draws dubious causal links based on hand-crafted statistics. With the right survey (which the researchers build themselves), you can show a statistically significant relationship between just about any two things.
Take any survey done only with college students--usually students at the researcher's university, often participating in the study for extra credit--with a grain of salt.

Posted by: Enough | Dec 5, 2008 11:18:11 AM

Ned
You might have noticed my absence as of late. It's not your column's (which I enjoy reading) but this sites Active X scripts which lock up my browser. So I come here less often (I need to run high security). How about putting in a word to the sponsers to clean up their act?

Posted by: Quietman | Dec 5, 2008 6:39:23 PM

Note from Ned--

Hmmm, Quietman. Sorry to hear about that. I'll tell our production folks.

Posted by: Ned Potter | Dec 5, 2008 9:34:46 PM

Thanks Ned

Posted by: Quietman | Dec 6, 2008 12:35:38 AM

Quietman -

Certain ads on this site (one unfailingly) either make my browser crash or make the cursor flicker. Refreshing replaces the ad with a new one, so you might try that.

Posted by: Jill Nikolaides | Dec 8, 2008 12:52:40 AM

Ned, thank you for this piece. I find social psych fascinating.

It occurs to me that it might not be the feeling or thought of cleanliness per se that made the difference, but its context.

The students were told to wash their hands "because the room was used by the faculty and needed to be kept extra clean." It would seem likely that this request would cast the person(s) conducting the experiment, who are perceived authority figures, as thoughtful, careful, and respectful. That, in turn, would make the students feel as if it's a safe environment, which could alter their perception of how wrong anything shown to them in that setting might be.

The words associated with cleanliness might have a similar subliminal effect. The scrambled sentences would probably become associated at least subconsciously with the setting and the researcher(s). Again, that would make the environment feel safer and more wholesome.

It would be interesting to see what would happen if the people administering the questions about moral dilemmas came into the room only for that purpose, without the students' having seen them before, so they are not associated with handwashing or words connoting cleanliness -- and to change nothing else. My guess would be that the difference between the "clean" group and the control group might be far less significant.

Posted by: Jill Nikolaides | Dec 8, 2008 1:09:29 AM

I should know better than to hope to express myself clearly so late at night. I think my last paragraph above is ambiguous.

What I meant was for there to be one person or persons requesting that subjects wash their hands or giving the scrambled sentences -- and then a changing of the guard, and a new person coming in to present the moral dilemmas.

Posted by: Jill Nikolaides | Dec 8, 2008 8:25:53 AM

Of course, one shouldn't forget the age-old line about "washing one's hands of the whole matter."

Posted by: andyr | Dec 8, 2008 12:21:43 PM

Ned & Jill
Well whatever it was, it's better now.
Jill, interesting comment BTW.

Posted by: Quietman | Dec 8, 2008 4:35:30 PM

Well I spoke too soon. Just got the active X controls message when I posted that comment. It was not doing that last night.

Posted by: Quietman | Dec 8, 2008 4:37:10 PM

Andyr, while I was fiddling around with controlling for other factors, I think you cut straight through to the heart of it. :-) Age-old lines only become age-old lines if they speak to something primal in us.

Come to think of it, the whole Lady Macbeth sleepwalking scene revolves around this very concept.

Now I want to go in search of an anthropologist who can tell us whether the same idea is reflected in the written and spoken language of widely divergent cultures. That would probably tell us more about whether it's cultural or innate than further experiments would.

~~~~~~~

Quietman, sorry it happened again. When you get the active x message, is your browser frozen, or can you still refresh? I'm willing to bet that when you posted, the ad on the new page was different and was the culprit. :-(

Posted by: Jill Nikolaides | Dec 8, 2008 6:49:36 PM

Jill, The line goes back to Biblical times, if not before that. Isn't that what Herod said of the "Jesus problem?" Come to think of it, many politicians have used the concept, too, in their dealings with social and political problems. It must be innate.

Posted by: andyr | Dec 9, 2008 10:08:56 AM

"more prepared to accept injustices and wrongdoing"

Posted by: dragon | Dec 9, 2008 12:06:09 PM

Jill
browser frozen, OK button in message non-responsive but sometimes frees up after a minute or two otherwise I bring up Task Manager and force the browser closed.
I don't know about the Ads, I will try to pay attention next time.

Posted by: Quietman | Dec 9, 2008 12:59:54 PM

Yes - the banner ad changed.

Posted by: Quietman | Dec 9, 2008 1:00:32 PM

Hey, Andy :-)

You're absolutely right, of course, that the idea of purifying with water goes back to biblical times. Apart from Christian baptism, both Jewish and Islamic law call for ritual baths under prescribed circumstances to regain spiritual purity. (Among Jews, it's mostly only Orthodox Jews who adhere to the practice now.)

So I'd expect any culture heavily influenced by the three Abrahamic religions to contain this idea even in a secular context. I'd expect language about washing away guilt or sin to be part of the literature and part of the spoken language in the form of idioms like "wash your hands of it."

I was actually wondering, though, if we'd find the same kind of idiom and literary theme (either written or in oral storytelling) in more isolated cultures -- tribal cultures in the Americas, Pacific islanders, parts of Asia and Africa not touched by our traditions and modern global culture. I think that's how we'd be able to distinguish between cultural and innate through the use of language.

Someone, somewhere, must have documented this idea. If not, I want to go out and do it!

In terms of the experiment itself, it still strikes me that they weren't controlling for how the people giving the questions were perceived. I also find myself wondering what effect it would have had if the moral dilemmas were presented with "time to think about them" -before- the handwashing or scrambled sentences. The difference could have been even more dramatic, although you'd have to make sure the control group had the same delay before answering, and probably control for interaction with other people and ambient sights and sounds during that interval.

Posted by: Jill Nikolaides | Dec 9, 2008 7:36:59 PM

Quietman, you mentioned that you have to run high security. Would it compromise anything, though, if you installed a different browser (Mozilla or Safari or whatever is different from what you currenty use), make the settings on that lower, and use it -only- for this site? The ads are annoying, but I can't imagine that any of the scripts are malicious. Just a thought.

Posted by: Jill Nikolaides | Dec 9, 2008 7:42:24 PM

Jill, Since water has been around for so long, and since it's so necessary for human life, it must be an integrated part of all cultures, in one way or another. Since humans have been around so long, I'm sure that water has worked its way into almost all cultures as some sort of iconic substance. This is particularly true in many religions, for baptism, blessings, etc. Then, there's the mysticism of the sea...

Posted by: andyr | Dec 10, 2008 8:00:55 AM

Andy, without question water is revered in every culture, since without it there's no life. I think all life, human and otherwise, has an innate understanding of its importance.

Going back to the study done at Plymouth University, though, we see what to me, at least, is an unexpected finding: that the act of washing one's hands, or even the thought of physical cleanliness, can actually offset moral repugnance. I find it hard to imagine that washing my hands would make it seem any more acceptable to violate a kitten in some unspeakable way for sexual pleasure (or for any reason). And yet, the study showed significantly more tolerance for just that among the handwashing group than among the control group. So the question we return to is whether we're culturally/religiously/ritually conditioned to feel as if physical washing heals us morally, or whether we're born with that response.

I think we'd have to look very closely at other cultures to find the answer.

Posted by: Jill Nikolaides | Dec 10, 2008 6:42:39 PM

There's some sort of psychological disorder that causes sufferers to wash their hands continuously. I don't know if it has to do with guilt or a feeling of being "unclean" in some way, or both. I would assume that this is a pan-cultural problem, since it's an individual affliction. Or have I strayed from the path?

Posted by: andyr | Dec 11, 2008 8:11:10 AM

Post a comment





 

TECHNOLOGY VIDEOS