Optimal emotional functioning is key to psychological well-being, allowing people to respond appropriately to their changing environment (
Kuppens & Verduyn, 2015). Therefore, it is perhaps unsurprising that several types of psychopathology are characterized by emotion dysregulation (
Carpenter & Trull, 2013;
Hofmann et al., 2012). This is the case for borderline personality disorder (BPD)—characterized by strong instability in several domains, including affect—and major depressive disorder (MDD)—often comorbid with BPD but specifically characterized by prolonged and persistent experiences of depressed mood (
American Psychiatric Association, 2013). To understand the nature of emotion dysregulation in psychopathology, including BPD and depression, it is crucial to study emotion regulation (ER) in response to personally relevant daily contexts (
Liu & Thompson, 2017). However, research investigating links between psychopathological features and emotion-regulatory processes in everyday life is scarce.
“Emotion regulation” refers to the processes through which people aim to influence their emotional states (
Gross, 2015). Effective regulation processes are central to psychological well-being because they allow people to address unwanted emotional experiences. In line with this idea, traditional research that used global self-report questionnaires or lab tasks has linked BPD to greater use of putatively maladaptive strategies, such as rumination (e.g.,
Baer et al., 2012) and thought suppression (e.g.,
Cheavens et al., 2005), that are generally ineffective in improving one’s mood (
Webb et al., 2012). Moreover, BPD is linked to less use of putatively adaptive strategies (e.g., reappraisal and distraction) that are generally effective at improving short-term mood (
Sauer et al., 2016). Likewise, meta-analyses have shown that depression is linked to more frequent use of ineffective strategies, such as rumination and suppression (
Aldao et al., 2010), and with the less frequent use of more effective strategies, such as reappraisal and acceptance (e.g.,
Liu & Thompson, 2017).
Although such studies provide insight into ER processes at play in people with psychopathology, they have two important shortcomings. First, global self-reports tend to assess people’s beliefs about how they typically regulate emotions, which may be distinct from their actual ER efforts in response to personally relevant everyday stressors (
Koval et al., 2023;
McMahon & Naragon-Gainey, 2020). Likewise, instructed ER use in the lab does not necessarily capture how people naturally regulate emotions (
Liu & Thompson, 2017). It is important to complement lab and global-questionnaire studies with daily life research that repeatedly assesses ER in the moment in personally relevant contexts (Koval & Kalokerinos, in press).
Second, research tends to focus on difficulties in ER strategy employment in general. However, ER involves several stages (
Gross, 2015), and research on psychopathology has focused primarily on the selection stage. To understand emotion dysregulation in psychopathology, we argue that it is necessary to examine not only differential strategy selection but also how effectively strategies are implemented.
Disentangling Selection and Effectiveness of ER Strategies
Studies that adopt a daily life approach to examine the selection or effectiveness of ER processes in BPD are rare. Two studies by
Chapman and colleagues (2009,
2017) used a daily life approach and revealed that people with BPD (features) reported lower levels of negative emotion (NE; but unchanged levels of positive emotion [PE]) on days they were instructed to avoid NE (
Chapman et al., 2017) and higher levels of PE on days they were instructed to suppress NEs as opposed to just observe their emotions (
Chapman et al., 2009).
Very few studies have examined both the selection and effectiveness of ER in BPD. First,
Southward and Cheavens (2020) used trait questionnaires and a written assignment to show that people with BPD reported both greater maladaptive-strategy use in the past month and lower quality of ER implementation than people with depression or control subjects. Second,
Howard and Cheavens (2023) investigated interpersonal ER using a global self-report measure and showed that BPD features were unrelated to the frequency of interpersonal ER but related to lower perceived efficacy of interpersonal ER. However, neither of these studies used a daily life approach. To our knowledge, there is only one daily life study in this area, a small pilot study (
N = 8;
Southward et al., 2020) that revealed that people with BPD most frequently reported attempts at focusing on the emotion they were currently experiencing, problem-solving, experiential avoidance, and acceptance. The participants experienced an increase in NEs after acceptance and an increase in positive affect after experiential avoidance. This was surprising because it suggested that acceptance—a putatively adaptive strategy—was ineffective and that a putatively maladaptive strategy—experiential avoidance—might be effective for this group. However, these findings should be interpreted with caution because of the small sample and lack of control group.
For depression, research that has looked at ER strategy use in daily life is also sparse. Studies have shown that people with MDD were more likely to use rumination in daily life (
Kircanski et al., 2015) and that for boys only, depressive symptoms were related to less frequent use of acceptance (
Lennarz et al., 2019). To our knowledge, only two daily life studies looked at both ER strategy selection and effectiveness in relation to depression.
Ruscio et al. (2015) found that people with depression reported higher levels of rumination after the occurrence of an event in daily life, which was related to a stronger subsequent increase in NE.
Pasyugina et al. (2015) showed that average level of rumination but not the impact of rumination use on subsequent emotions predicted increases in depressive features in students. These daily life studies again confirm the well-established association between depression and rumination (
Kovács et al., 2020) but also illustrate the lack of studies on other ER strategy use and its effectiveness in daily life.
Our Study
The goal of the current study was to better understand ER in people with BPD and depressive features by addressing two research questions. We investigated whether higher levels of psychopathological features (related to BPD and depression) were associated with differences in ER strategy (a) selection and (b) effectiveness. Although selection of ER strategies can be measured in different ways, we focused on average degree to which a strategy was used, in line with
Koval et al. (2023). Furthermore, given that ER is almost always employed to reduce aversive emotional states in daily life (
Kalokerinos et al., 2017;
Riediger et al., 2009), we operationalized effectiveness of ER strategies in terms of their potential to decrease NEs and increase PEs. In addition, because depression often occurs comorbidly with BPD (
Zimmerman & Mattia, 1999) but has a different emotion-dynamic signature (
American Psychiatric Association, 2013;
Houben et al., 2015), we examined whether the findings reflect transdiagnostic processes or are specific to either BPD or depressive features.
On the basis of previous research, we hypothesized that higher levels of psychopathological features would be associated with (a) increased selection of putatively maladaptive ER strategies (rumination, suppression) and decreased selection of putatively adaptive ER strategies (distraction, reappraisal), (b) less effective implementation of adaptive strategies (i.e., weaker subsequent improvements in emotions), and (c) more detrimental implementation of maladaptive strategies (i.e., stronger subsequent worsening of emotional states). For all hypotheses, when accounting for overlap between BPD and depressive features, we expected more pronounced effects for BPD features than for depressive features because BPD is more strongly associated with emotional dysregulation (
Carpenter & Trull, 2013;
Linehan et al., 2007).
Transparency and Openness
Preregistration
Neither the study design nor the analysis plan was preregistered.
Data, materials, code, and online resources
Data and code for all analyses are available at
https://osf.io/ydt98. The
Supplemental Material available online includes all variables collected in this study, additional details regarding our sample and analytic approach, descriptive statistics and correlations, supplemental analyses, more detailed results regarding our main analyses, and a systematic overview of all results.
Reporting
We report how we determined our sample size a priori and report all manipulations and all measures in the study. No data were excluded for any of the analyses.
Ethical approval
The study was approved by the Ethical Board of KU Leuven (S54567) in accordance with the Declaration of Helsinki.
Method
Participants
Participants were 202 students commencing their first year at a Belgian university or higher education institute, which typically involves many challenges. Participants were prescreened on depressive symptoms and included via a stratified-sampling approach (
Ingram & Siegle, 2009). This resulted in a sample with varying levels of depressive and BPD features allowing us to adopt a dimensional approach to psychopathology (
Kotov et al., 2017). The sample scored higher than the average Dutch-speaking Belgian population on both BPD- and depressive-features measures (
Schotte & De Doncker, 1996;
Schotte et al., 1998;
Wu et al., 2016); around 30% of the sample scored high and 6% scored very high on both BPD and depressive features (
Gotlib et al., 1995;
Radloff, 1977;
Schotte & De Doncker, 1996;
Schotte et al., 1998).
The average age of the total sample was 18.32 years (
SD = 0.96), and sex assigned at birth was female for 55% of the sample. Participants all completed at least upper secondary education. Most reported a European background (96%) and Belgian nationality (93%). For more detailed information about the sample, see the
Supplemental Material.
Procedure
This was a three-wave longitudinal study. Waves 2 (
N = 191) and 3 (
N = 178) were 4 and 12 months after Wave 1, respectively.
1 In each wave, participants completed cross-sectional self-report questionnaires alongside other tasks not relevant for the current report (see the
Supplemental Material). Participants also completed an experience-sampling-method (ESM) protocol, during which they carried a smartphone throughout their everyday lives. The ESM protocol was conducted using the custom-built ESM software MobileQ (
Meers et al., 2020;
https://mobileq.org), installed on research-dedicated Motorola Defy Plus smartphones. The smartphones were programmed to signal participants with a survey 10 times daily for 7 days between 10 a.m. and 10 p.m. according to a stratified random-interval scheme. On average, participants had an average compliance rate of 86.78% (
SD = 10.30%) in Wave 1, 87.66% (
SD = 9.38%) in Wave 2, and 88.14% (
SD = 9.13%) in Wave 3.
Measures
Center for Epidemiologic Studies–Depression Scale
The Center for Epidemiologic Studies–Depression (CES-D) Scale (
Radloff, 1977) is a valid 20-item self-report questionnaire that assesses the frequency of depressive symptoms during the past week (e.g., “In the past week, I felt depressed”) on a scale from 0 (
rarely or none of the time) to 3 (
most or all of the time). The average of all CES-D items was used as a measure of depressive features. Internal consistency was good at Wave 1 (α = .88), Wave 2 (α = .92), and Wave 3 (α = .88).
Assessment of DSM-IV Personality Disorders BPD scale
The BPD scale of the Assessment of DSM-IV Personality Disorders (
Schotte et al., 1998) comprises 10 self-report trait items that assess the nine diagnostic criteria for BPD of the fifth edition of the
Diagnostic and Statistical Manual of Mental Disorders (
American Psychiatric Association, 2013). Suicidality and self-harm are assessed using separate items. Each item is rated on a scale from 1 (
totally disagree) to 7 (
totally agree). A dimensional BPD score is obtained by taking the average across all trait items. Internal consistency was acceptable in Wave 1 (α = .69), Wave 2 (α = .74), and Wave 3 (α = .75).
NEs and PEs (ESM)
Participants rated the degree to which they were currently experiencing five NEs (sad, angry, anxious, depressed, stressed) and three PEs (happy, relaxed, and cheerful) on a continuous slider scale from 0 (
not at all) to 100 (
very much). Scores were averaged to form composite NE and PE; there were good to excellent reliability estimates for NE in Wave 1 (within participants: ω = .73; between participants: ω = .93), Wave 2 (within participants: ω = .73; between participants: ω = .94), and Wave 3 (within participants: ω = .71; between participants: ω = .95) and for PE in Wave 1 (within participants: ω = .74; between participants: ω = .91), Wave 2 (within participants: ω = .68; between participants: ω = .88), and Wave 3 (within participants: ω = .69; between participants: ω = .85), following the approach by
Geldhof et al. (2014).
Emotion regulation (ESM)
Participants rated the degree to which they used each of the six following ER strategies (adapted from
Brans et al., 2013) on continuous slider scales from 0 (
not at all) to 100 (
very much): “Since the last beep, have you ruminated about something in the past?” and “Have you ruminated about something in the future?” (averaged to form a single rumination score); “Have you distracted yourself from your feelings?” (distraction); “Have you looked at the cause of your feelings from another perspective?” (reappraisal); “Have you suppressed the expression of your emotions?” (expressive suppression); “Have you talked to others about your emotions?” (social sharing).
Data analytic strategy
We fit linear mixed-effects models with ESM surveys (N = 34,660) nested within waves (N = 3) nested within people (N = 202). The momentary predictors were centered within persons and within waves. BPD and depressive features were aggregated to the person level and grand-mean centered. Next, all variables were also standardized to aid in model convergence.
We ran three sets of analyses (selection, effectiveness for NE, and effectiveness for PE). For each set, a separate model was estimated for each ER strategy, resulting in a total of 15 models. To correct for five tests in each set, we used a Bonferroni-corrected α of .01.
In the selection models, we tested the association between mean ER endorsement and BPD features (Model A), depressive features (Model B), and both sets of features (Model C). The NE-effectiveness models tested whether the association between ER strategy endorsement and subsequent NE (correcting for lagged NE) was moderated by either BPD features (Model A), depressive features (Model B), and both sets of features simultaneously (Model C). Effectiveness Models D through F replicated effectiveness Models A through C but modeled change in PE. For supplemental selection models, a visual representation of the effectiveness models, and more detail about the data analytic approach, see the
Supplemental Material.
Results
For descriptive statistics for all variables, see
Tables S1 and S2 in the Supplemental Material. For within-persons, between-waves, and between-persons correlations, see
Tables S3 through S5 in the Supplemental Material.
Selection models
As shown in
Table 1, in Models A and B, when BPD and depressive features were entered as separate predictors, both were significantly positively associated with all ER strategies, except social sharing. When BPD and depressive features were entered simultaneously (Model C), effects of both remained positive but decreased in size, suggesting the absence of statistical suppression effects.
In the Model C for rumination and suppression, significant positive effects were still found for both BPD and depressive features. However, the decreased coefficients of both features suggested shared variance between the two types of features in predicting ER strategy use, indicative of a partial transdiagnostic association between psychopathological features and rumination/suppression use. However, in addition, both BPD and depressive features explained a unique significant portion of variance, suggesting specific effects of BPD and depressive features on rumination and suppression use.
For distraction and reappraisal selection in Model C, BPD features remained statistically significant and of a similar magnitude to Model A, whereas the effect of depressive features became nonsignificant.
Effectiveness models
Results from effectiveness Models A through C, which examined change in NE, are shown in
Table 2, and those from Models D through F, which examined change in PE, are in
Table 3. Of all interaction effects of interest, only four were significant (using our corrected α of
p < .01): For the models with the features entered separately, both BPD and depressive features interacted with distraction and reappraisal in predicting change in NE.
When decomposing these interactions using simple slopes (see
Fig. 1), we found the same pattern for all four interactions: Momentary distraction and reappraisal were associated with larger subsequent increases in NE among participants with lower levels of both types of features (see
Table 2). Visual inspection of
Figure 1 suggests that this interaction is driven by differences among participants with high versus low features at low levels of strategy use. Specifically, at low levels of distraction and reappraisal, participants with higher depressive and BPD features showed higher levels of NE than participants with lower levels of features. In contrast, at high levels of strategy use, all participants (regardless of their level of features) showed similarly high levels of NE.
However, these interaction effects were no longer statistically significant when both features were entered as simultaneous predictors (see Model C in
Table 2). For a summary of the findings across all models, see
Table S13 in the Supplemental Material.
Discussion
In a three-wave ESM study, we investigated the associations between BPD and depressive features, on the one hand, and the selection and effectiveness of several ER strategies, on the other hand. When considered separately, both BPD and depressive features predicted greater endorsement of all strategies except social sharing. When overlap between the two sets of features was corrected for, results remained the same for BPD features, but depressive features were associated only with greater selection of maladaptive strategies (i.e., rumination and suppression). Regarding effectiveness, there was no consistent evidence that either set of psychopathological features was associated with altered strategy effectiveness in terms of subsequent changes in PEs or NEs.
The selection of ER strategies in daily life
We hypothesized that both depressive and BPD features would be characterized by higher levels of maladaptive-strategy use and lower levels of adaptive-strategy use. These hypotheses were partially confirmed for BPD features. Participants with higher levels of BPD symptoms showed unique positive associations with both rumination and suppression—strategies that have been labeled maladaptive and linked to negative outcomes—but unexpectedly, also reappraisal and distraction—strategies that have been labeled adaptive because of their links with positive outcomes. This was not in line with previous research that has linked BPD mainly to increased endorsement of maladaptive ER strategies and reduced endorsement of adaptive ER strategies (see
Sauer et al., 2016). Moreover, as hypothesized, overall, more specific effects were found for BPD features compared with depressive features, although the results were not always in the expected direction.
In contrast, as hypothesized, depressive features were uniquely linked to higher levels of rumination and expressive suppression, both putatively maladaptive strategies. This finding is in line with previous studies (
Aldao et al., 2010;
Kovács et al., 2020;
Olatunji et al., 2013;
Ruscio et al., 2015). The hypothesized association with weaker putatively adaptive ER use was not confirmed.
Effectiveness of ER strategies in daily life
We found only four interactions, which showed that people with more BPD and depressive features exhibited higher NE than people with lower levels of features at very low levels of distraction and reappraisal use but similar levels of NE at high levels of distraction and reappraisal use. This finding is in line with the idea that higher NE at high ER levels reflects the use of distraction in response to increased NE rather than the “harmful” effects of using distraction or reappraisal. Overall, these effectiveness models, as operationalized in this study, suggest that people with high levels of BPD or depressive features are not more or less effective in the use of any ER strategy than people low in these features.
Implications for understanding emotion dysregulation in psychopathology
BPD features were uniquely linked to a higher use of putatively maladaptive but also adaptive ER strategies. This suggests that people with BPD features might be attempting to regulate their emotions more often in general, using both putatively adaptive and maladaptive strategies, although they exhibit no altered effectiveness, in terms of changes in PE and NE, at implementing these strategies to improve affect. This could be explained in different ways.
First, the surprisingly high use of adaptive strategies may contradict previous studies that have assessed trait ER with global self-report scales because we studied ER use at a moment-to-moment level. Perhaps people with elevated BPD features may only briefly attempt to unsuccessfully employ these strategies and instead rely more heavily on maladaptive strategies. Global self-reported ER may not capture more fleeting momentary use of adaptive ER strategies. To explore this idea, further research should examine the duration of each ER strategy.
Second, the relatively high endorsement of not just one but most ER strategies could reflect erratic trial-and-error behavior in an attempt to regulate emotions, indicating problems with the selection of the appropriate ER strategy. In future research, it will be necessary to further investigate the triggering factors of strategy selection, the role of strategy switching, and how goals precipitate strategy use in BPD.
Depressive features were uniquely associated with the use of more putatively maladaptive ER strategies but not altered effectiveness. This suggests that the emotion dysregulation among people with high levels of depressive features is mostly characterized by the selection of ER strategies that do not help to improve mood rather than less effective implementation of ER strategies.
Limitations
There are some limitations of the current research, which we hope will be addressed in future studies. First, we used a dimensional approach to psychopathology (
Kotov et al., 2017), but generalizability to clinical populations should be investigated. Likewise, it is not clear whether these findings generalize to other ER strategies beyond those assessed in this study. Second, we operationalized ER selection by looking at the degree to which each ER strategy was used. Therefore, we potentially conflate different aspects of ER selection, such as the (relative) frequency and duration of strategy use and the degree of effort, and future research should disentangle different aspects of selection. Third, people with higher levels of psychopathology might have a different understanding of what the use of each ER strategy entails, although all participants were briefed in the same way. Fourth, to understand the effectiveness of ER strategies, researchers should look beyond associations with changing emotions to also directly assess self-reported emotion goal fulfilment (
Aldao et al., 2015). Last, despite our large sample size and many repeated measurements per person, it is unclear whether our sample has sufficient power to detect, especially, cross-level interaction effects. Future replication studies are needed to further establish our conclusions.
Conclusions
First, we showed that BPD features are uniquely linked to a higher self-reported tendency to select both putatively adaptive and maladaptive ER strategies but not altered effectiveness of these strategies. Second, we found that depressive features are uniquely associated with the selection of putatively maladaptive strategies in daily life. These findings suggest that deficits may be primarily located in strategy selection rather than the implementation of those strategies and highlight the importance of assessing ER outside the lab and across multiple stages.