Nature walks improve cognition in people with depression

June, 2012

A small study provides more support for the idea that viewing nature can refresh your attention and improve short-term memory, and extends it to those with clinical depression.

I’ve talked before about Dr Berman’s research into Attention Restoration Theory, which proposes that people concentrate better after nature walks or even just looking at nature scenes. In his latest study, the findings have been extended to those with clinical depression.

The study involved 20 young adults (average age 26), all of whom had a diagnosis of major depressive disorder. Short-term memory and mood were assessed (using the backwards digit span task and the PANAS), and then participants were asked to think about an unresolved, painful autobiographical experience. They were then randomly assigned to go for a 50-minute walk along a prescribed route in either the Ann Arbor Arboretum (woodland park) or traffic heavy portions of downtown Ann Arbor. After the walk, mood and cognition were again assessed. A week later the participants repeated the entire procedure in the other location.

Participants exhibited a significant (16%) increase in attention and working memory after the nature walk compared to the urban walk. While participants felt more positive after both walks, there was no correlation with memory effects.

The finding is particularly interesting because depression is characterized by high levels of rumination and negative thinking. It seemed quite likely, then, that a solitary walk in the park might make depressed people feel worse, and worsen working memory. It’s intriguing that it didn’t.

It’s also worth emphasizing that, as in earlier studies, this effect of nature on cognition appears to be independent of mood (which is, of course, the basic tenet of Attention Restoration Theory).

Of course, this study is, like the others, small, and involves the same demographic. Hopefully future research will extend the sample groups, to middle-aged and older adults.

Reference: 

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