Ethan Kross

Facebook Use Predicts Declines in Subjective Well-Being in Young Adults

Over 500 million people interact daily with Facebook. Yet, whether Facebook use influences subjective well-being over time is unknown. We addressed this issue using experience-sampling, the most reliable method for measuring in-vivo behavior and psychological experience. We text-messaged people five times per day for two-weeks to examine how Facebook use influences the two components of subjective well-being: how people feel moment-to-moment and how satisfied they are with their lives. Our results indicate that Facebook use predicts negative shifts on both of these variables over time. The more people used Facebook at one time point, the worse they felt the next time we text-messaged them; the more they used Facebook over two-weeks, the more their life satisfaction levels declined over time. Interacting with other people “directly” did not predict these negative outcomes. They were also not moderated by the size of peoples Facebook networks, their perceived supportiveness, motivation for using Facebook, gender, loneliness, self-esteem, or depression. On the surface, Facebook provides an invaluable resource for fulfilling the basic human need for social connection. Rather than enhancing well-being, however, these findings suggest that Facebook may undermine it.

An fMRI-Based Neurologic Signature of Physical Pain

BACKGROUND Persistent pain is measured by means of self-report, the sole reliance on which hampers diagnosis and treatment. Functional magnetic resonance imaging (fMRI) holds promise for identifying objective measures of pain, but brain measures that are sensitive and specific to physical pain have not yet been identified. METHODS In four studies involving a total of 114 participants, we developed an fMRI-based measure that predicts pain intensity at the level of the individual person. In study 1, we used machine-learning analyses to identify a pattern of fMRI activity across brain regions--a neurologic signature--that was associated with heat-induced pain. The pattern included the thalamus, the posterior and anterior insulae, the secondary somatosensory cortex, the anterior cingulate cortex, the periaqueductal gray matter, and other regions. In study 2, we tested the sensitivity and specificity of the signature to pain versus warmth in a new sample. In study 3, we assessed specificity relative to social pain, which activates many of the same brain regions as physical pain. In study 4, we assessed the responsiveness of the measure to the analgesic agent remifentanil. RESULTS In study 1, the neurologic signature showed sensitivity and specificity of 94% or more (95% confidence interval [CI], 89 to 98) in discriminating painful heat from nonpainful warmth, pain anticipation, and pain recall. In study 2, the signature discriminated between painful heat and nonpainful warmth with 93% sensitivity and specificity (95% CI, 84 to 100). In study 3, it discriminated between physical pain and social pain with 85% sensitivity (95% CI, 76 to 94) and 73% specificity (95% CI, 61 to 84) and with 95% sensitivity and specificity in a forced-choice test of which of two conditions was more painful. In study 4, the strength of the signature response was substantially reduced when remifentanil was administered. CONCLUSIONS It is possible to use fMRI to assess pain elicited by noxious heat in healthy persons. Future studies are needed to assess whether the signature predicts clinical pain. (Funded by the National Institute on Drug Abuse and others.).

Prefrontal–striatal pathway underlies cognitive regulation of craving

The ability to control craving for substances that offer immediate rewards but whose long-term consumption may pose serious risks lies at the root of substance use disorders and is critical for mental and physical health. Despite its importance, the neural systems supporting this ability remain unclear. Here, we investigated this issue using functional imaging to examine neural activity in cigarette smokers, the most prevalent substance-dependent population in the United States, as they used cognitive strategies to regulate craving for cigarettes and food. We found that the cognitive down-regulation of craving was associated with (i) activity in regions previously associated with regulating emotion in particular and cognitive control in general, including dorsomedial, dorsolateral, and ventrolateral prefrontal cortices, and (ii) decreased activity in regions previously associated with craving, including the ventral striatum, subgenual cingulate, amygdala, and ventral tegmental area. Decreases in craving correlated with decreases in ventral striatum activity and increases in dorsolateral prefrontal cortex activity, with ventral striatal activity fully mediating the relationship between lateral prefrontal cortex and reported craving. These results provide insight into the mechanisms that enable cognitive strategies to effectively regulate craving, suggesting that it involves neural dynamics parallel to those involved in regulating other emotions. In so doing, this study provides a methodological tool and conceptual foundation for studying this ability across substance using populations and developing more effective treatments for substance use disorders.

When Asking “Why” Does Not Hurt Distinguishing Rumination From Reflective Processing of Negative Emotions

Two experiments examined the psychological operations that enable individuals to process negative emotions and experiences without increasing negative affect. In Study 1, type of self-perspective (self-immersed vs. self-distanced) and type of emotional focus (what vs. why) were experimentally manipulated following the recall of an anger-eliciting interpersonal experience. A why focus on emotions from a self-distanced perspective (distanced-why strategy) was expected to enable “cool,” reflective processing of emotions, in which individuals can focus on their experience without reactivating excessive “hot” negative affect. Findings were consistent with this hypothesis. Study 2 replicated these findings and furthermore demonstrated that (a) the degree to which individuals construe their recalled experience in abstract versus concrete terms mediates the effect of the distanced-why strategy and (b) the status of the recalled experience (resolved vs. unresolved) does not moderate the effectiveness of the distanced-why strategy. These findings help disentangle the mechanisms that may allow adaptive working through from those that lead to rumination.

Social rejection shares somatosensory representations with physical pain

How similar are the experiences of social rejection and physical pain? Extant research suggests that a network of brain regions that support the affective but not the sensory components of physical pain underlie both experiences. Here we demonstrate that when rejection is powerfully elicited—by having people who recently experienced an unwanted break-up view a photograph of their ex-partner as they think about being rejected—areas that support the sensory components of physical pain (secondary somatosensory cortex; dorsal posterior insula) become active. We demonstrate the overlap between social rejection and physical pain in these areas by comparing both conditions in the same individuals using functional MRI. We further demonstrate the specificity of the secondary somatosensory cortex and dorsal posterior insula activity to physical pain by comparing activated locations in our study with a database of over 500 published studies. Activation in these regions was highly diagnostic of physical pain, with positive predictive values up to 88%. These results give new meaning to the idea that rejection “hurts.” They demonstrate that rejection and physical pain are similar not only in that they are both distressing—they share a common somatosensory representation as well.

Depression, rumination and the default network

Major depressive disorder (MDD) has been characterized by excessive default-network activation and connectivity with the subgenual cingulate. These hyper-connectivities are often interpreted as reflecting rumination, where MDDs perseverate on negative, self-referential thoughts. However, the relationship between connectivity and rumination has not been established. Furthermore, previous research has not examined how connectivity with the subgenual cingulate differs when individuals are engaged in a task or not. The purpose of the present study was to examine connectivity of the default network specifically in the subgenual cingulate both on- and off-task, and to examine the relationship between connectivity and rumination. Analyses using a seed-based connectivity approach revealed that MDDs show more neural functional connectivity between the posterior-cingulate cortex and the subgenual-cingulate cortex than healthy individuals during rest periods, but not during task engagement. Importantly, these rest-period connectivities correlated with behavioral measures of rumination and brooding, but not reflection.

Facilitating Adaptive Emotional Analysis: Distinguishing Distanced-Analysis of Depressive Experiences From Immersed-Analysis and Distraction

Two studies examined the psychological processes that facilitate adaptive emotional analysis. In Study 1, participants recalled a depression experience and then analyzed their feelings from either a self-immersed (immersed-analysis) or self-distanced (distanced-analysis) perspective. Participants in the distanced-analysis group focused less on recounting their experience and more on reconstruing it, which in turn led to lower levels of depressed affect. Furthermore, comparisons to a distraction group indicated that distanced-analysis was as effective as distraction in reducing depressed affect relative to the immersed-analysis group. Study 2 replicated these findings and showed that both 1 day and 7 days after the experimental manipulations, participants in the distanced-analysis group remained buffered against depressed affect and reported experiencing fewer recurring thoughts about their depression experience over time compared to both the immersed-analysis and distraction groups.

From a distance: implications of spontaneous self-distancing for adaptive self-reflection.

Although recent experimental work indicates that self-distancing facilitates adaptive self-reflection, it remains unclear (a) whether spontaneous self-distancing leads to similar adaptive outcomes, (b) how spontaneous self-distancing relates to avoidance, and (c) how this strategy impacts interpersonal behavior. Three studies examined these issues demonstrating that the more participants spontaneously self-distanced while reflecting on negative memories, the less emotional (Studies 1-3) and cardiovascular (Study 2) reactivity they displayed in the short term. Spontaneous self-distancing was also associated with lower emotional reactivity and intrusive ideation over time (Study 1). The negative association between spontaneous self-distancing and emotional reactivity was mediated by how participants construed their experience (i.e., less recounting relative to reconstruing) rather than avoidance (Studies 1-2). In addition, spontaneous self-distancing was associated with more problem-solving behavior and less reciprocation of negativity during conflicts among couples in ongoing relationships (Study 3). Although spontaneous self-distancing was empirically related to trait rumination, it explained unique variance in predicting key outcomes.

Making Meaning out of Negative Experiences by Self-Distancing

Both common wisdom and findings from multiple areas of research suggest that it is helpful to understand and make meaning out of negative experiences. However, people’s attempts to do so often backfire, leading them to ruminate and feel worse. Here we attempt to shed light on these seemingly contradictory sets of findings by examining the role that self-distancing plays in facilitating adaptive self-reflection. We begin by briefly describing the “self-reflection paradox.” We then define self-distancing, present evidence from multiple levels of analysis that illustrate how this process facilitates adaptive self-reflection, and discuss the basic science and practical implications of this research.

Enhancing the Pace of Recovery Self-Distanced Analysis of Negative Experiences Reduces Blood Pressure Reactivity

Recent work suggests that rumination plays a key role in mediating the relationship between stress and cardiovascular disease (Brosschot, Gerin, & Thayer, 2006). People engage in rumination because they believe that understanding their feelings will improve their mood. However, these attempts often backfire, instead maintaining negative affect (Nolen-Hoeksema, 1991) and delaying physiological recovery from negative events (Glynn, Christenfeld, & Gerin, 2002)—a key risk factor for cardiovascular disease (McEwen, 1998). At first glance, these findings suggest that people should avoid focusing on their negative feelings. However, this prescription contradicts an alternative literature indicating that emotional processing facilitates coping (e.g., Pennebaker & Chung, 2007). Thus, a key question emerges: How can people analyze negative experiences without enhancing their vulnerability to cardiovascular disease? According to a recent proposal (Kross, Ayduk, & Mischel, 2005), whether people’s attempts to understand their negative feelings are adaptive depends on the type of self-perspective they adopt. Research results supported the prediction that analyzing feelings surrounding a negative experience from a selfdistanced perspective (from an observer’s vantage point) leads people to display lower levels of negative affect and rumination than does analyzing such feelings from a self-immersed perspective (from one’s own vantage point; Kross et al., 2005; also see Kross & Ayduk, in press). The current study extends these findings to cardiovascular reactivity. We predicted that participants who adopted a selfdistanced perspective, compared with those who adopted a selfimmersed perspective, would demonstrate smaller increases in blood pressure reactivity both when analyzing their feelings during the experiment and during a recovery period after the experiment was over. METHOD