We used a randomized controlled trial to test the effectiveness of a gratitude 3-blessings treatment for enhancing subjective well-being. Although several experimental studies have investigated gratitude interventions, many of these have used inadequate control conditions, and currently we know little about how gratitude treatments work. In this study, subjects were randomly assigned to one of three daily 1-week treatments: memory placebo, pride 3-blessings, or gratitude 3-blessings. The gratitude 3-blessings treatment significantly outperformed the comparison treatments in enhancing well-being. Moreover, the well-being of those in the gratitude treatment continued to climb after the treatment phase, similar to the findings of Seligman, Steen, Park, and Peterson (2005). We also found that the gratitude treatment enhanced the accessibility of positive memories compared to the comparison treatments. Our results suggest that exercises like the gratitude 3-blessings treatment may train cognitive biases that are salubrious to subjective well-being.

Although gratitude is important to the good life, little is known about factors that enhance gratitude. Some have suggested that traumatic events such as near-death experiences and life-threatening illnesses might enhance gratitude. If reflecting on death causes one to appreciate life as a limited resource, this might enhance gratitude. This study investigated this theory. Participants were randomly assigned to a death reflection condition, a traditional mortality salience condition, or to a control condition. Participants in the death reflection and the mortality salience conditions showed enhanced gratitude compared to individuals in the control condition, supporting the theory that becoming aware of one's mortal limitations enhances gratitude for the life that what one has.

In three studies we investigated joy and its relationship to subjective well-being (SWB). We developed measures of joy based on recent conceptualizations of joy in the humanities and social sciences. In Studies 1 and 2 we developed reliable measures of state and trait joy. In Study 3 we used a two-month prospective design to investigate the relationship of joy to gratitude and SWB. We found that dispositional gratitude predicted increases in state joy over time. We also found that trait joy predicted increases in state gratitude, providing evidence for an intriguing upward spiral between joy and gratitude. Finally, we found that trait joy was associated with increases in SWB over time. Factor analyses indicated that joy loaded separately from other positive emotions. We conclude that joy is a discrete positive emotion, it can be measured reliably with self-report instruments, and that it may be an important component of well-being.

If gratitude is important to well-being, it is important to understand the factors that might inhibit gratitude. The purpose of this study was to investigate four putative inhibitors of gratitude: narcissism, cynicism, materialism/envy, and indebtedness. We used a prospective design where participants were administered measures related to the putative inhibitors along with trait and state gratitude, 2 months apart. After controlling for initial levels of gratitude, Time 1 narcissism, cynicism, and materialism/envy were negatively associated with Time 2 state gratitude. Evidence also supported the theory that narcissism and cynicism may interact in a vicious cycle over time. We conclude that narcissism, cynicism, and materialism inhibit state gratitude, and narcissism and cynicism may be the foundational ‘thieves of thankfulness.’

The purpose of this study was to investigate an unconscious or implicit mood-congruent memory (MCM) bias in clinical depression. Many studies have shown an explicit memory bias, but no study has yet found an implicit MCM bias in clinical depression. The authors compared depressed and control group participants on a conceptually driven implicit memory test. After studying words of positive, neutral, and negative affective valences, participants produced free associations to various cues. Implicit memory or priming was demonstrated by the production of more studied than unstudied words to the association cues. Depressed participants showed more priming of negative words, whereas controls showed more priming of positive words, thus supporting the MCM pattern. Also, no implicit memory deficit was found in depressed participants. These findings are discussed in the context of several prominent theories of cognition and depression.

We investigated whether mood-congruent memory (MCM) bias in depression is a function of implicit or explicit memory. Implicit memory is taken as a measure of ease of activation, whereas explicit memory also taps elaboration. As expected, MCM bias was found in the explicit memory task but not in the implicit memory task. We believe this finding supports the involvement of elaborative mechanisms in MCM. In addition, memory bias was found with words related to depression but not with words denoting physical threat. Thus, the MCM bias in explicit memory was found to be specific to information that was congruent with depression rather than to all negative information.