Significant Results

Using research findings to tell a more positive story.

What's So Positive About Positive Psychology?

The question is "how" not "whether" happiness interventions work.

Chances are, if you are reading this then you are at least passingly familiar with the emerging field of positive psychology. Although every religious and philosophical tradition through antiquity has offered insight into the “good life” it is only in the last couple decades that we have truly been able to turn scientific attention to this important topic in a sophisticated way. Modern scientists have used careful research designs, validated assessments and rich theory to produce new and sometimes counter-intuitive ideas about age-old topics such as happiness, resilience, and hope. Among the set-pieces of this modern movement are so-called “positive psychology interventions.” These are, more or less, simple behaviors in which a person can engage to improve her own well-being. The most famous of these is the “gratitude exercise.” In this exercise people are instructed to jot down “three things” for which they are grateful. The list might include a reliable automobile, a sunny afternoon, or a healthy child. The list will change from person to person and from time to time. The results are in, however: the gratitude exercise appears to boost individual happiness and buffer people from the deleterious effects of depression. This finding has been replicated and most famously so with a randomized controlled study conducted by positive psychology founder Martin Seligman and his colleagues.  

Since that initial study appeared in 2005 there have been other positive psychology interventions that have been tested and have shown—at least in a preliminary way—evidence for small boosts in happiness. One of these is the “counting kindnesses” intervention conducted by Keiko Otake and her colleagues. As the name implies people who kept a tally of their daily kindnesses felt a little spring in their step as a result. The publication of the counting kindnesses intervention set me to wondering what the causal mechanisms were that might form the foundation of positive psychology interventions. Could it be, for instance, that the gratitude exercise actually boosts appreciation and this improved mindfulness translates to a better mood? Or might it be that gratitude works primarily by reminding people to appreciate things they overlook, and in this ways functions primarily by acting as an antidote to the natural human tendency to adapt.

Privately, I have been worried by what I see as the uncritical acceptance of these intervention techniques by some coaches and other human service professionals. It’s nice to know that these techniques work—for the most part—but isn’t it even nicer to understand how they work? For months I harbored a sneaking suspicion that positive psychology interventions such as counting kindnesses and the gratitude exercise were simply “listing interventions.” That is, I was curious to know if we might find the same rise in happiness if we had people simply list anything positive. Imagine having people keep a daily “courage diary” in which they listed three ways they didn’t let discomfort hold them back. Or picture a scenario in which people tally hopes, such as “three things that are likely to happen in the next two weeks that you are eagerly looking forward to.” Could it be that any instance of pen, paper and positivity constitutes an effective positive psychology intervention?

Interestingly, this exact premise was tested in a study that appeared in the Journal of Clinical Psychology. The researchers replicated the classic Seligman study using a sample of nearly 1,500 adults ranging in age from 18 to 72. They included the gratitude exercise, a “positive placebo” in which they had participants write for 10 minutes each evening about a positive memory, and a control placebo in which they had participants wrote for 10 minutes each evening about an early life memory (not necessarily a positive one). Using the same happiness assessment employed by Seligman in the original study, the researchers discovered that the positive memory exercise performed roughly in the same way that the gratitude exercise did: both boosted happiness and did so over three and six month follow-ups. Now, on the one hand, it would seem that the researchers have created yet another positive psychology intervention. Hooray! We can now add the “positive memory exercise” to the stable of happiness boosting activities.

In the end, however, the researchers draw much the same conclusion I do: there is some common factor that acts as the therapeutic mechanism for many of these “listing interventions.” According to the researchers, engaging in any activity that makes positive self-information more accessible is likely to have a tonic effect on people. This does not mean that we should dismiss positive psychology exercises as somehow “fake.” It does mean that we should not rush to mental closure on their effectiveness or the ways in which we use them. This is an important study because it opens the door to exciting new research questions: are there different types of positive psychology interventions? Will some types work better with certain people than with others? Are there people for whom these activities are contra-indicated? Is salient positive self-information as powerful as positive information about loved ones? How might these interventions be modified to be more effective across cultural boundaries? We are just scratching the surface of these tools.


Mongrain, M. & Anselmo-Matthews, T. (2012). Do positive psychology exercises work? A replication of Seligman et al. (2005). Journal of Clinical Psychology, 68, 382-389


Robert Biswas-Diener is a happiness researcher, coach, and adventurer.


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