Physiological synchrony in supportive discussions: An examination of co-rumination, relationship type, and heterogeneity.

During times of stress, we look to close others for support. Social support conversations are critical for relationship maintenance and well-being. Yet, certain ways of talking about problems-such as co-ruminating-can exacerbate stress. Since social support and co-rumination are both dyadic processes, it is important to examine physiological responses during these conversations in a dyadic manner. Little research has examined physiological synchrony of the sympathetic nervous system (SNS) during social support conversations or co-ruminative conversations. The current research capitalizes on an experimental manipulation of co-rumination using a sample of close friends (147 dyads) and romantic partners (113 dyads) to examine physiological covariation in the context of support. Across both samples, dyads exhibited significant physiological covariation in pre-ejection period reactivity (PEP). Contrary to our hypothesis, dyads in the co-rumination condition did not show more covariation. Close friend dyads did, however, exhibit more covariation as compared to romantic dyads. We also found significant variability in physiological covariation across dyads, with a minority of dyads exhibiting negative covariation of PEP reactivity. The homogeneity of the samples limits the generalizability of the findings and highlights the need for more diverse samples in future work. These findings underline the need for further exploration into the mechanisms that contribute to distinct patterns of physiological synchrony, the conditions in which negative synchrony occurs, and what predicts especially strong positive synchrony. This work extends our understanding of physiological synchrony of the sympathetic nervous system during support conversations and emphasizes the importance of considering heterogeneity in physiological processes.

Conflicting patterns of cardiovascular reactivity, self-report, and behavior associated with social anxiety during a conversation with a close friend.

Social anxiety (SA) is characterized by anxious symptomology and fear during social situations, but recent work suggests that SA may not necessarily be associated with negative interpersonal and intrapersonal outcomes in support contexts. The current research investigates the discrepancies between self-perceptions, behavior, and physiological responses associated with SA in social support conversations with close friends. Specifically, we examined the associations between SA and positive and negative affect, perceptions of demands and resources, and responsiveness. Additionally, we used the biopsychosocial model of challenge and threat to understand the physiological responses associated with SA. Participants (79.9% White, 9.8% Black or African American, 10.3% Multiple races or other; 78.7% Female), totaling 172 undergraduate friend dyads, completed self-report measures and had physiological responses recorded while they discussed a problem unrelated to the friendship. Trained coders rated responsive behaviors exhibited during the conversation. Results revealed that greater SA was associated with greater negative perceptions of social interactions (greater negative affect, fewer perceived resources, and greater perceived demands). However, cardiovascular reactivity and behavioral responses within the conversation, as well as perceptions of partners' behavior after the conversation, contrasted with these negative perceptions. Indeed, greater SA was associated with greater sympathetic arousal (indicative of greater task engagement), but not with greater challenge or threat, and SA was not associated with perceived partner responsiveness or responsive behaviors. These results add to the growing body of research that suggests people with greater SA show inconsistencies between their conscious appraisals of social situations and their physiological responses.

Suspended Materials Affect Particle Size Distribution and Removal of Environmental DNA in Flowing Waters.

Environmental DNA (eDNA) in aquatic systems is a complex mixture that includes dissolved DNA, intracellular DNA, and particle-adsorbed DNA. Information about the various components of eDNA and their relative proportions could be used to discern target organism abundance and location. However, a limited knowledge of eDNA adsorption dynamics and interactions with other materials hinders these applications. To address this gap, we used recirculating stream mesocosms to investigate the impact of suspended materials (fine particulate organic matter, plankton, clay, and titanium dioxide) on the eDNA concentration and particle size distribution (PSD) from two fish species in flowing water. Our findings revealed that eDNA rapidly adsorbs to other materials in the water column, affecting its concentration and PSD. Nonetheless, only particulate organic matter affected eDNA removal rate after 30 h. Moreover, we observed that the removal of larger eDNA components (≥10 µm) was more strongly influenced by physical processes, whereas the removal of smaller eDNA components was driven by biological degradation. This disparity in removal mechanisms between larger and smaller eDNA components could explain changes in eDNA composition over time and space, which have implications for modeling the spatial distribution and abundance of target species and optimizing eDNA detection in high turbidity systems.

Microbes and mental health: Can the microbiome help explain clinical heterogeneity in psychiatry?

Trillions of microbes cover the surfaces of our bodies and inhabit our gastrointestinal tract. In the past decade, research efforts examining the role of the microbiome in mental health have moved to the forefront of neuroscience and psychiatry. Based on a foundation of animal studies demonstrating the vital role for microbiota-brain communication in brain development, behavior, and brain function over the life span, clinical studies have started to consider the microbiome in psychiatric disorders. The composition, diversity and function of commensal microbes is influenced by genetic, lifestyle, and environmental factors. This review provides an overview of the factors contributing to individual differences in the microbiome, reviews recent work in psychiatric disorders, and considers what is needed to advance a better understanding of how the microbiome impacts mental health which may help us understand the heterogeneity observed in clinical psychiatric populations.

"Let's go over it again": Examining the intra- and interpersonal processes that perpetuate co-rumination in close relationships.

Co-rumination is an interpersonal emotion regulation strategy characterized by extensive, cyclical conversations regarding the causes and consequences of problems and associated negative emotions. Theory posits that over time, interpersonal benefits of co-rumination such as emotional intimacy reinforce the behavior, outweighing the resulting negative impacts on mental health. However, our understanding of how co-rumination is perpetuated within conversations is limited. This study (conducted in 2019-2020) aims to assess perceptions of partner co-rumination and responsiveness as factors that perpetuate co-rumination to better understand the intra- and interpersonal processes that influence how co-rumination unfolds within conversations. To do this, we utilized an observational paradigm with primarily White, female, young adult friendship dyads wherein one individual (the discloser) disclosed and discussed an extradyadic problem with a close friend (the responder). Using an empathic accuracy paradigm, participants reported their own and their partner's co-rumination and responsiveness for every 30-s epoch. Results revealed biased estimations of partner co-rumination that may facilitate reciprocity of co-ruminative conversation within the dyad. Additionally, while greater perceptions of partner co-rumination were perceived as responsive by disclosers and elicited responsive behavior from responders, perceived partner responsiveness did not perpetuate co-rumination within the conversation. Together, these findings enhance our understanding of the intra- and interpersonal processes that influence how co-rumination unfolds within conversations between close friends, but they also draw attention to unanswered questions in the field regarding partner contributions to co-rumination, the nature of problems discussed, and generalizability of these findings as well as those of other extant co-rumination research. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Sense of power and markers of challenge and threat during extra-dyadic problem discussions with romantic partners.

Power, the capacity to influence others while resisting their attempts at influence, has implications for a wide variety of individual- and relationship-level outcomes. One potential mechanism through which power may be associated with various outcomes is motivation orientation. High power has been linked to greater approach-oriented motivation, whereas low power has been linked to greater avoidance-oriented motivation. However, current research has mostly relied on artificially created relationships (and the power dynamics therein) in the lab to assess the associations between power and motivation orientations. Utilizing the Biopsychosocial Model of Challenge and Threat framework, the current study examined how power is related to physiological responses indicative of psychological challenge (i.e., approach) and threat (i.e., avoidance) during discussions of problems outside of the relationship between romantic partners. The primary hypothesis that higher power would be associated with more approach-oriented challenge and less avoidance-oriented threat was supported via self-reports, but not via physiological assessments. Instead, physiological assessments revealed that for those disclosing problems to high-power partners, greater power was associated with reactivity consistent with more avoidance-oriented threat and less approach-oriented challenge. This is the first research to examine associations between power and in vivo indices of challenge and threat during interactions between romantic partners. It advances our understanding of how power elicits motivation orientations and influences the stress response system by highlighting the importance of situational attributes (e.g., role during a conversation) that may undermine power during disclosures with a high-power partner.

The intrapersonal and interpersonal consequences of a new experimental manipulation of co-rumination.

Co-rumination is a form of interpersonal emotion regulation wherein dyads engage in extensive, cyclical conversations regarding the causes and consequences of problems and associated negative emotions. In the present investigation, we leveraged the biopsychosocial model of challenge and threat to elucidate the intrapersonal costs and interpersonal benefits of co-rumination. To do so, we developed the first direct experimental manipulation of co-rumination using a multimethod, dyadic approach to test the effects of co-rumination on both dyad members. Friend dyads (N = 172) engaged in conversation during which one dyad member (i.e., the discloser) divulged and discussed their most stressful, extradyadic problem with their friend (i.e., the responder). Dyads either engaged in co-rumination or talked about the problem as they would naturally. Validating the experimental paradigm, results revealed a pattern of intrapersonal costs (stressed/upset feelings and rumination) and interpersonal benefits (perceived partner responsiveness) of co-rumination that replicated and extended past research. Regarding challenge and threat, results indicated that female disclosers in the co-rumination (vs. natural) condition exhibited physiological responses corresponding to greater psychological threat (i.e., greater total peripheral resistance). This research contributes to a growing body of literature identifying co-rumination as a vulnerability factor that exacerbates stress, potentially leading to poor downstream health outcomes. Furthermore, these results highlight the importance of examining co-rumination from a dyadic perspective, as inter- and intrapersonal effects varied as a function of whether individuals were disclosing or responding during the problem talk discussion. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Evil joy is hard to share: Negative affect attenuates interpersonal capitalizing on immoral deeds.

Capitalization is an interpersonal process in which individuals (capitalizers) communicate their accomplishments to others (responders). When these attempts to capitalize are met with enthusiastic responses, individuals reap greater personal and social benefits from the accomplishment. This research integrated the interpersonal model of capitalization with moral foundations theory to examine whether accomplishments achieved through immoral (vs. moral) means disrupt the interpersonal processes of capitalization. We hypothesized that an accomplishment achieved through immoral (vs. moral) means would suppress the positive affective response often reaped from capitalizing on good news. We conducted two, mixed-methods experiments in which individuals interacted with a stranger (Study 1) or with their romantic partner (Study 2). We found that responders exhibited greater self-reported negative emotions, avoidance motivation, and arousal when reacting to capitalizers' immoral (vs. moral) accomplishments. In turn, greater negative affect predicted less enthusiastic verbal responses to capitalization attempts. In Study 2 we found that immoral accomplishments increased avoidance motivation, which contrary to our expectations, increased expressions of happiness. These studies reveal that the moral means by which accomplishments are achieved can disrupt the interpersonal process of capitalization. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Environmental DNA (eDNA) removal rates in streams differ by particle size under varying substrate and light conditions.

The use of environmental DNA (eDNA) as a sampling tool offers insights into the detection of invasive and/or rare aquatic species and enables biodiversity assessment without traditional sampling approaches, which are often labor-intensive. However, our understanding of the environmental factors that impact eDNA removal (i.e., how rapidly eDNA is removed from the water column by the combination of decay and physical removal) in flowing waters is limited. This limitation constrains predictions about the location and density of target organisms after positive detection. To address this question, we spiked Common Carp (Cyprinus carpio) eDNA into recirculating mesocosms (n = 24) under varying light (shaded versus open) and benthic substrate conditions (no substrate, bare substrate, and biofilm-colonized substrate). We then collected water samples from each mesocosm at four time points (40 min, 6 h, 18 h, and 48 h), and sequentially filtered the samples through 10, 1.0, and 0.2 µm filters to quantify removal rates for different eDNA particle sizes under varying light and substrate conditions. Combining all size classes, total eDNA removal rates were higher for mesocosms with biofilm-colonized substrate compared to those with no substrate or bare (i.e., no biofilm) substrate, which is consistent with previous findings linking biofilm colonization with increased eDNA removal and degradation. Additionally, when biofilm was present, light availability increased eDNA removal; eDNA levels fell below detection after 6-18 h for open mesocosms versus 18-48 h for shaded mesocosms. Among size classes, larger particles (>10 µm) were removed faster than small particles (1.0-0.2 µm). These results suggest that changes in the distribution of eDNA size classes over time (e.g., with downstream transport) and with differing environmental conditions could be used to predict the location of target organisms in flowing waters, which will advance the use of eDNA as a tool for species monitoring and management.

Physiological correlates of support for self-expansion and links to goal pursuit in retirement.

Partner support for self-expansion has been associated with long-term health and retirement satisfaction, yet the underlying physiological correlates are unknown. We predicted that partner support for self-expansion would be associated with short-term physiology and behavior as well as long-term goal pursuit. And 100 couples with at least one retiree within 2 years of retirement visited the laboratory and had a discussion of the retirees' future goals for retirement. We recorded behaviors and physiological responses during the discussion, assessed immediate feelings of capability afterwards, and then assessed goal pursuit one year later. Laboratory results indicated that partner support for self-expansion was linked to increased stroke volume reactivity in the support-recipient (suggesting a greater challenge response), which in turn predicted greater feelings of capability of accomplishing the goal, particularly for males. In addition, decreases in the support-provider's pre-ejection period reactivity (greater sympathetic arousal) during the discussion were associated with greater partner support for self-expansion in the lab, suggesting that support providers offer greater levels of support when they exhibit greater physiological signs of task engagement. Longitudinal follow-up results indicated that immediate feelings of capability of accomplishing the goal following a discussion about that goal predicted goal pursuit 1 year later. This research leverages a dyadic design and a multi-method approach (involving physiology, observed behavior, and perceptions) to show that couple members' physiology during goal discussions has long-term implications for a support-recipient's ability to accomplish goals.

When enhanced awareness threatens: Interactive effects of domain-specific awareness and acceptance manipulations on cardiovascular indices of challenge and threat.

Mindfulness includes acceptance and awareness subcomponents, and emerging theories imply that cultivating both acceptance and awareness may benefit health by diminishing stress reactivity. Yet, no prior work has examined the effects of mindful acceptance and awareness on cardiovascular markers of threat and challenge-cardiac output and total peripheral resistance-despite the unique insights these indices yield into stress-related evaluations and motivation. The current research integrates Monitor and Acceptance Theory with the Biopsychosocial Model of Challenge and Threat to elucidate how an awareness manipulation and a brief acceptance training are associated with cardiovascular stress responses underlying states of challenge and threat. Healthy young adults (N = 202) were enrolled in a 2 × 2 between-subjects experimental design manipulating both awareness (enhanced awareness vs. no enhanced awareness) and acceptance (acceptance training vs. no acceptance training) of physiological responses to a social-evaluative cold pressor test. Cardiovascular indices were recorded throughout. The combination of enhanced awareness and acceptance training led to higher cardiac output and lower total peripheral resistance (indexing greater challenge, less threat) to the cold pressor test than the combination of enhanced awareness and no acceptance training. However, the combination of no enhanced awareness and no acceptance training also led to higher cardiac output and lower total peripheral resistance than the combination of enhanced awareness and no acceptance training. These results add to a growing body of work suggesting that mindful awareness and acceptance subcomponents interact to influence stress reactivity and imply that enhanced stressor awareness without acceptance may lead to increased threat.

Attachment anxiety and the curvilinear effects of expressive suppression on individuals' and partners' outcomes.

Suppressing the expression of negative emotions tends to undermine individuals' and their partners' wellbeing. However, sometimes expressive suppression may be relatively innocuous given that individuals commonly withhold negative emotions in order to maintain close relationships, and this may be especially the case when expressive suppression is enacted by people who exhibit amplified expressions of negative emotions, such as those high in attachment anxiety. The current research examined when and for whom expressive suppression may be more or less costly by testing whether the curvilinear effect of individuals' expressive suppression on individuals' and partners' outcomes is moderated by individuals' attachment anxiety. Our results across 3 dyadic studies revealed a linear effect of expressive suppression when predicting individuals' outcomes: greater expressive suppression had costs for individuals (lower relationship satisfaction, reported responsiveness and discussion success, and greater discussion threat). Furthermore, in 4 of the 5 models, a moderated curvilinear effect of expressive suppression emerged when predicting partners' outcomes. For individuals low in attachment anxiety, low levels of expressive suppression did not incur costs for their partners' relationship satisfaction, perceptions of individuals' responsiveness, discussion success, and discussion threat. Once expressive suppression surpassed moderate levels, however, greater expressive suppression had a detrimental effect on partners' outcomes. In contrast, for individuals high in attachment anxiety, the negative effect of moderate-to-high levels of expressive suppression on partners' outcomes was attenuated. These novel results demonstrate how considering curvilinear methods can uncover when and for whom expressive suppression may be more or less costly in intimate relationships. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Perceptions of romantic partners' emotional suppression are more biased than accurate.

The interpersonal consequences associated with emotional suppression (ES) may indicate that perceivers accurately detect targets' use of ES. However, ES involves hiding emotional experiences and expressions and consequently provides few explicit cues for perceivers. Thus, perceivers may exhibit relatively poor accuracy in detecting targets' ES and instead base perceptions of targets' ES on their own use of ES-a bias called projection. In the current study, participants completed measures of trait ES, engaged in an emotionally relevant discussion with their intimate partner, and then reviewed the discussion to rate their own and their partners' (targets') state ES within each 30s of the discussion. Perceptions of targets' state ES were more strongly predicted by perceivers' own state ES (projection bias) than the targets' reported use of ES (tracking accuracy), particularly for perceivers' high in trait ES. This pattern of projection bias resulted in perceivers overestimating the level of targets' state ES. These results indicate that perceptions of ES are generated more from perceivers' rather than targets' use of ES, suggest informant-based ES assessments have important limitations, and advance understanding of the interpersonal effects of ES. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Growing into retirement: Longitudinal evidence for the importance of partner support for self-expansion.

Retirement can be a turbulent time of life in which people must navigate changes in their identity from ending a career and beginning a new phase of life. However, retirement can also provide opportunities for growth or self-expansion. We examined the benefits of partner support for self-expansion by using longitudinal evidence (at 3 time points) in a sample of 73 couples. We tested a theoretical model proposing that partner support for self-expansion at Time 1 would predict retirement satisfaction and overall health 1 year later and that these effects would be mediated by self-expansion at 6 months. Using structural equation modeling, we found significant indirect effects for both retirement satisfaction and health, supporting all hypotheses. These results suggest that during retirement, partners play an important role in encouraging opportunities for growth as an investment toward future retirement satisfaction and health. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

The effects of dispositional restrictiveness on physiological markers of challenge and threat during a hypothetical transitional period in romantic relationships.

Restrictiveness, a component of relationship dominance associated with monitoring and regulating partners' behavior, is a risk factor and accelerant of Intimate Partner Violence (IPV). Few studies, however, have examined in vivo physiological responses associated with restrictiveness. Toward this end, 105 romantic couples (N = 210) completed measures of restrictiveness and had their physiological responses recorded in anticipation of and during a dyadic interaction in which they discussed a hypothetical transitional period in which one person (the discloser) revealed to their partner (the responder) that they had just gotten into their dream school or was offered their dream job. Individuals high (vs. low) in restrictiveness exhibited physiological responses indicative of greater psychological challenge (e.g., elevated cardiac output and lower peripheral resistance) in anticipation of and during the conversation. In contrast, their partners exhibited greater physiological indicators of psychological threat in anticipation of (but not during) the conversation, particularly when assigned to the discloser role. Exploratory analyses of communication behaviors corroborated the physiological data. This research integrates the biopsychosocial model of challenge and threat with theories of relationship power and dominance to demonstrate the physiological manifestations of a well-known risk factor for IPV in romantic relationships and interpersonal restrictiveness.

Anionic nanoparticle and microplastic non-exponential distributions from source scale with grain size in environmental granular media.

Nanoparticle and microplastic (colloid) transport behaviors impact strategies for groundwater protection and remediation. Complex colloid transport behaviors of anionic nano- and micro-sized colloids have been previously elucidated via independent experiments in chemically-cleaned and amended granular media with grain sizes in the range of fine to coarse sand (e.g., 200-1000 µm). Such experiments show that under conditions where a repulsive barrier was present in colloid-collector interactions (unfavorable conditions), the distribution of retained colloids down-gradient from their source deviates from the exponential decrease expected from compounded loss across a series of collectors (grains). Previous experiments have not examined the impact of colloid size or granular media grain size on colloid distribution down-gradient from their source, particularly in streambed-equilibrated granular media. To address this gap, a field transport experiment in constructed wetland stream beds to distances up to 20 m were conducted for colloids ranging in size from micro to nano (60 nm-7 µm) in streambed-equilibrated pea gravel and sand (4200 and 420 µm mean grain sizes, respectively). All colloid sizes showed non-exponential (hyper-exponential) distributions from source, over meter scales in pea gravel versus cm scales reported for fine sand. Colloids in the ca. 1 µm size range were most mobile, as expected from mass transfer to surfaces and interaction with nanoscale heterogeneity. The distance over which non-exponential colloid distribution occurred increased with media grain size, which carries implications for the potential mechanism driving non-exponential colloid distribution from source, and for strategies to predict transport.

Does expressing emotions enhance perceptual accuracy of negative emotions during relationship interactions?

Partners' negative emotions communicate social information necessary for individuals to respond appropriately to important relational events. Yet, there is inconsistent evidence regarding whether partners' emotional expression enhances accurate perceptions of partners' emotions. The current studies make methodological and theoretical extensions to the extant literature by directly assessing whether partners' emotional expression during relationship interactions predicts 2 types of accuracy relevant to the theorized interpersonal functions of negative emotions: tracking accuracy and directional bias. In Studies 1 and 2, both members of recruited couples reported on their own negative emotions, disclosure of emotions, and perceptions of their partners' negative emotions during relationship interactions at the end of each day for 21 days. In Study 3, couples engaged in an emotionally relevant discussion in the laboratory. Participants immediately reviewed their discussions and rated their own negative emotions and perceptions of their partners' negative emotions within each 30-s segment of the discussion. Independent coders rated the degree to which each person expressed their emotions during the discussion. In all three studies, partners' greater emotional expression predicted perceivers more accurately tracking partners' negative emotions (greater tracking accuracy). High levels of partners' emotional expression also predicted perceivers overestimating partners' negative emotions (greater directional bias). This expression-perception pattern should support the interpersonal function of negative emotions by orienting perceivers to important emotional events that would be costly to overlook. The results, considered in the context of prior research, highlight the importance of matching methodological approaches with the theoretical processes under investigation. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Do habitual emotional suppression measures predict response-focused situational suppression during social interactions?

Greater habitual emotional suppression (ES)-assessed by the suppression subscale of the emotion regulation questionnaire (ERQ-ES; Gross & John, 2003) and the Courtauld emotion control scale (CECS; Watson & Greer, 1983)-is associated with a range of negative outcomes, which are assumed to arise because habitual ES measures capture the tendency to use ES in response to emotions. The current studies directly test whether habitual ES measures actually capture the response-focused use of ES when emotions arise within social interactions. We conduct these validation tests by integrating measures of habitual ES with naturalistic assessments of negative emotions and the situational use of ES during emotionally relevant interactions with romantic partners (Study 1, N = 200; Study 3, N = 170) and social interactions with close others in daily life (Study 2, N = 430). Greater ERQ-ES and CECS scores predicted greater average levels of situational ES, but only greater scores on the ERQ-ES consistently predicted greater situational ES in response to negative emotions, including greater situational ES for people who experienced more negative emotions than others and when people experienced greater negative emotions than their own average. These results support that the ERQ-ES captures a response-focused pattern of situational ES that is sensitive to varying negative emotions within specific interactions. The CECS may capture a more pervasive, consistent use of ES across situations. Our novel tests offer an important framework for how to validate emotion regulation assessments to advance both theory and methodology. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Habitat explains patterns of population decline for an invasive crayfish.

Invasive nonindigenous species are defined by their impacts: they substantially change native communities or ecosystems. Accordingly, invasive species might transform their habitats in ways that eventually become unfavorable to them, causing population declines or even extirpations. Here we use over 40 yr of systematically collected data on the abundance of the invasive rusty crayfish Faxonius rusticus from 17 lakes in northern Wisconsin, USA to explore whether population declines of this invader are related to the prevalence of rocky habitat, which shelters crayfish from predators and is unchanged by crayfish. We predicted that lakes with rock-dominated substrates would be resistant to F. rusticus population declines, whereas lakes lacking rock-dominated substrates would experience F. rusticus declines due to crayfish destruction of shelter-providing macrophytes. We found that in nearly one-half (47%) of the study lakes, F. rusticus experienced population declines over the study time period, and these lakes had significantly lower proportions of rock substrate than lakes that did not experience population declines. We recommend that more studies should investigate the potential for invasive species-mediated community or ecosystem feedbacks to eventually contribute to their own population declines.

Cardiovascular indexes of threat impair responsiveness in situations of conflicting interests.

This research examined how situations in which self- and relationship-interests are misaligned can "get under the skin" to negatively impact cardiovascular and relationship processes. Interdependence theory was integrated with the biopsychosocial model of challenge and threat to better understand the biological processes that underlie relationship behavior in stressful circumstances. Couples engaged in a discussion in which one person (the discloser) revealed s/he had just gotten into her/his dream job or school and the other person (the responder) reacted to the news. Couples were randomly assigned to discuss living apart (self and relationship interests do not align) or together (self and relationships do align). Both responders and disclosers who discussed long-distance relationships and exhibited greater cardiovascular indexes of threat were behaviorally less responsive to their partners. Analyses also revealed that responders (regardless of conversation topic) who exhibited greater cardiovascular indexes of threat were less responsive. In addition to direct consequences for relationship processes and affective dynamics, these data implicate indirect pathways between relationship wellbeing and cardiovascular functioning.