Further unpacking individual differences in mind wandering: The role of emotional valence and awareness.

Previous work has established a link between executive attention ability and mind wandering propensity, these studies typically collapse thought reports into a single category of task-unrelated thoughts (TUTs). We have shown that these TUTs can be differentiated by the emotional valence of their content. Awareness of TUTs might also be an important to consider, yet little work has been done on this front. The current study conceptually replicated and extended previous work by investigating the relationship between individual differences in executive attention, emotional valence and awareness of TUTs. Latent variable models indicated that Executive Attention was differentially correlated with emotional valence TUTs. However, only Attention Control was related to frequency of mind wandering with awareness. Intra-individual analyses indicated that negatively valenced TUTs and TUTs that occurred without awareness were associated with worse performance. Considering different dimensions of TUTs can provide a more complete picture of individual differences in mind wandering.

The role of affective interference and mnemonic load in the dynamic adjustment in working memory.

The amount of cognitive control required during a task may fluctuate over the course of performing a task. The dynamic upregulation of cognitive control has been proposed to occur in response to conflict or in response to the need for additional control during demanding cognitive tasks. Specifically, upregulation in cognitive control results in improved performance on trials that follow more demanding trials. Recent work has demonstrated that upregulation occurs during following trials with high (vs. low) mnemonic load and negative (vs. neutral) affective interference during working memory tasks. Although dynamic upregulation appears to be a robust phenomenon, less is known about individual difference factors that may alter the likelihood to engage in upregulation as a result of a signal to increase cognitive control. The current study attempted to replicate prior findings that suggest upregulation may occur following higher load trials or affective interference during a working memory task. Further, the study examined anxiety, depressive symptomatology, working memory capacity, mood, and dispositional mindfulness and possible moderators for upregulation of cognitive control. Participants (N = 150) completed a delayed recognition working memory task with mnemonic load (High vs. Low) and affective interference (Negative vs. Neutral) parametrically manipulated. Participants completed measures of the individual difference factors. The current findings replicate prior work demonstrating an upregulation of cognitive control following high load trials and negative affective interference. Individual difference factors did not moderate the upregulation findings, suggesting that upregulation is a robust phenomenon that can be triggered by both affective interference and mnemonic load.

Individual differences in dimensions of mind wandering: the mediating role of emotional valence and intentionality.

Individual differences in executive control ability reliably show that those with greater executive control report fewer instances of mind wandering during moderately demanding tasks. However, these findings have been limited in that they often treated mind wandering as a variable that collapsed across a variety of thought categories or dimensions. We suggest that two dimensions of mind wandering, intentionality and emotional valence, may be differential related to individual difference in executive control ability. The present study examined this using multiple measures of working memory capacity and attentional control while measuring emotional valence and intentionality of mind wandering during a single sustained attention task. Non-cognitive predictors of mind wandering were also measured. Overall, the results suggest that both working memory capacity and attention control are significant predictors of mind wandering propensity, replicating previous findings. However, the dimensions of emotional valence and intentionality suggested that this finding was not consistent across all types of thought reports. The current findings provide support for the view that it is critical to consider these two dimensions, among other important dimensions, of mind wandering to have a more complete understanding of individual differences in mind wandering.

A Functional Adenosine Deaminase Polymorphism Associates with Evening Melatonin Levels and Sleep Quality.

Increased adenosine levels throughout the day promote sleepiness. A single nucleotide polymorphism (SNP) in the adenosine deaminase ADA gene (rs73598374) has been shown to affect sleep regulation. The extent to which lower ADA enzymatic activity is associated with the homeostatic sleep factor, melatonin, is uncertain. To test this possibility, we assessed the relationship between the ADA polymorphism and evening melatonin levels, as well as self-reported sleep behavior. Given the close relationship between mood and sleep behavior, we further tested the impact of ADA genotype on self-reported mood. We show that relative to the GG homozygotes, the A allele carriers (higher adenosine levels) had significantly higher evening melatonin levels as well as significantly better sleep quality. We further show the correlations between sleep and mood measures were altered by ADA genotype, with a stronger relationship observed in the GG (lower adenosine) group. Combined, these findings advance our understanding of the biochemistry of melatonin production by showing that there is a relationship between ADA genotype and melatonin levels. The differential relationships between sleep and psychological health between the genotype groups may reveal novel insights about the development of genotype-specific progression of various psychological disorders such as chronic anxiety and stress.

An individual differences investigation of the relations among life event stress, working memory capacity, and mind wandering: A preregistered replication-extension study.

Klein and Boals (2001a, Applied Cognitive Psychology, 15[5], 565-579, Experiments 1 and 2) found that working memory capacity correlated negatively with perceived negative life event stress and speculated the relation may be driven by thoughts produced from these experiences. Here, we sought to replicate the association between working memory capacity and perceived negative life experience and to assess potential mediators of this association such as mind wandering propensity, rumination propensity, and the sum of negatively valenced mind wandering reports. In this preregistered replication and extension study, with data collected from 356 subjects (ns differ among analyses), we found no evidence suggesting that perceived negative life stress is associated with working memory capacity. Additionally, we found evidence consistent with the claim that negatively valenced mind wandering is uniquely detrimental to cognitive task performance, but we highlight a potential confound that may account for this association that should be addressed in future work.

The influence of Val158Met COMT on physiological stress responsivity.

We tested the extent to which the catechol-O-methyltransferase (COMT) Val158Met polymorphism is associated with stress response and pain in both men and women. The participants were assessed on measures of perceived pain and state/trait anxiety in association with their COMT allele status. We also measured cortisol and salivary alpha-amylase (sAA) levels since previous research suggests an association between the COMT Val159Met polymorphism, cortisol secretion, and sAA activity. We found significant differences between methionine (Met) allele carriers and valine (Val) homozygotes following a stress manipulation in sAA levels. Met allele carriers had a stronger sAA response when compared to Val homozygotes. Furthermore, Val homozygotes showed a positive correlation between their sAA levels and trait anxiety at baseline and 20 min post-stress manipulation but displayed a negative correlation with the change in sAA levels from baseline to 20 min post-stress manipulation. Finally, state/trait anxiety was significantly correlated in Met allele carriers. These findings add support to the COMT warror/worrier model which states under stressful situations, increased dopamine levels in Val (warrior) homozygotes affords an emotional advantage relative to Met (worrier) allele carriers, who show an increased reactivity to aversive stimuli. Summary These findings offer new support for the warrior/worrier model of COMT genotype (rs4680) on human behavior. Twenty minutes following exposure to a cold stress, Val homozygotes (warrior) showed a lower biochemical stress response (salivary alpha-amylase, sAA) relative to methionine (Met) allele carriers (worrier). We further show that the COMT genotype differentially influences state and trait anxiety measures as they relate to stress responses and to each other.

Understanding the role of mind wandering in stress-related working memory impairments.

Mind wandering has been identified as a possible cause for stress-related working memory (WM) task impairments following laboratory stressors. The current study attempted to induce mind wandering regarding negative, positive, or neutral events using an expressive writing task and examined the impact on WM task performance. We examined the role of mind wandering in understanding the impact of life stress on WM. Additionally, we explored the role of thought suppression on the relationship between mind wandering and WM. One hundred and fifty participants completed WM measures before (Time 1) and after (Time 2) the writing manipulation. The writing manipulation did not alter mind wandering or WM task performance. Time 1 WM predicted mind wandering during the Time 2 WM task, which subsequently predicted poorer Time 2 WM task performance. The impact of daily life stress on WM was mediated by mind wandering. Trait levels of thought suppression moderated the impact of mind wandering on WM. Specifically, higher levels of suppression resulted in stronger negative impact of mind wandering on WM task performance. Findings are discussed in terms of the impact of mind wandering on WM task performance.

Examining the role of emotional valence of mind wandering: All mind wandering is not equal.

To evaluate the role of emotional valence on the impact of mind wandering on working memory (WM) and sustained attention, we reanalyzed data from three independently conducted studies that examined the impact of stress on WM (Banks & Boals, 2016; Banks, Welhaf, & Srour, 2015) and sustained attention (Banks, Tartar, & Welhaf, 2014). Across all studies, participants reported the content of their thoughts at random intervals during the WM or sustained attention task. Thought probes in all studies included a core set of response options for task-unrelated thoughts (TUTs) that were negatively, positively, or neutrally emotionally valenced. In line with theories of emotional valenced stimuli on capture of attention, results suggest negatively valenced TUTs, but not positively valenced TUTs, were related to poorer WM and sustained attention in two studies. Neutral TUTs were related to poorer WM but not sustained attention performance. Implications for models of mind wandering are discussed.

Poor sleep quality is associated with a negative cognitive bias and decreased sustained attention.

Poor sleep quality has been demonstrated to diminish cognitive performance, impair psychosocial functioning and alter the perception of stress. At present, however, there is little understanding of how sleep quality affects emotion processing. The aim of the present study was to determine the extent to which sleep quality, measured through the Pittsburg Sleep Quality Index, influences affective symptoms as well as the interaction between stress and performance on an emotional memory test and sustained attention task. To that end, 154 undergraduate students (mean age: 21.27 years, standard deviation = 4.03) completed a series of measures, including the Pittsburg Sleep Quality Index, the Sustained Attention to Response Task, an emotion picture recognition task and affective symptom questionnaires following either a control or physical stress manipulation, the cold pressor test. As sleep quality and psychosocial functioning differ among chronotypes, we also included chronotype and time of day as variables of interest to ensure that the effects of sleep quality on the emotional and non-emotional tasks were not attributed to these related factors. We found that poor sleep quality is related to greater depressive symptoms, anxiety and mood disturbances. While an overall relationship between global Pittsburg Sleep Quality Index score and emotion and attention measures was not supported, poor sleep quality, as an independent component, was associated with better memory for negative stimuli and a deficit in sustained attention to non-emotional stimuli. Importantly, these effects were not sensitive to stress, chronotype or time of day. Combined, these results suggest that individuals with poor sleep quality show an increase in affective symptomatology as well as a negative cognitive bias with a concomitant decrease in sustained attention to non-emotional stimuli.

The protective effects of brief mindfulness meditation training.

Mindfulness meditation has gained a great deal of attention in recent years due to the variety of physical and psychological benefits, including improved working memory, decreased mind wandering and reduced impact of stress on working memory. The current study examined a 1-week at home mindfulness meditation intervention compared to an active control intervention. Results suggest that mindfulness meditation does not increase working memory or decrease mind wandering but does prevent stress related working memory impairments. Mindfulness meditation appears to alter the factors that impair working memory such that the negative impact of mind wandering on working memory was only evident at higher levels of negative affect. The use of cognitive mechanism words in narratives of stressful events did not differ by condition but predicted poorer working memory in the control condition. The results support the use of an at home mindfulness meditation intervention for reducing stress-related impairments.

Where's the impairment: an examination of factors that impact sustained attention following a stressor.

The impact of stress on cognitive functioning has been examined across multiple domains. However, few studies investigate both physical and psychological factors that impact cognitive performance. The current study examined the impact of a physical and psychosocial stressor on sustained attention and identified factors related to sustained attention, including cortisol, salivary alpha amylase (sAA) and mind wandering. A total of 53 participants completed either the socially evaluated cold pressor task or a control task followed by the sustained attention to response task with mind wandering measures. Participants also provided saliva samples following the attention task. Results indicate the stressor task did not impact mind wandering or sustained attention but increased cortisol and sAA. Mind wandering was negatively related to sustained attention and mediated the relationship between cortisol and sustained attention. The findings highlight the importance of examining multiple sources of stress-related cognitive impairments.

Effects of emotional valence of mind wandering on sustained attention performance.

The construct of mind wandering has notoriously been characterized as heterogenous which may mean that not all types of mind wandering produce the same pattern of results. One operationalization of mind wandering, task-unrelated thoughts (TUTs), can also itself vary in many dimensions, including the emotional valence of TUTs. The current study summarizes several years of work examining the impact that the emotional valence of TUTs has on different aspects of sustained attention. Participants in several studies reported whether their TUTs were negative, neutral, or positive in emotional valence during a sustained attention-to-response task (SART). The first major focus was a meta-analysis where we examined correlations between each TUT valence and SART performance measures. For the second major focus, we tested how different TUT valences changed over the course of the task. The results suggest that negative TUTs typically show stronger associations with SART performance measures, although all TUT valences have numerically similar correlations. Regarding time-on-task effects, across the studies, there was consistent evidence for a linear increase in negative TUTs across blocks. Evidence for this linear increase was not consistent for neutral and positive TUTs. The results of the current study suggest that the relationships between TUTs and performance, and their likelihood of occurring during a task, are not necessarily the same for every type of TUT. These results highlight the importance of continuing to investigate different types of TUTs and different forms of mind wandering, in general, to better understand how this phenomenon occurs. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Age-Related Differences in Mind Wandering: The Role of Emotional Valence.

OBJECTIVES: Older adults consistently report fewer experiences of mind wandering compared to younger adults. Aging is also associated with a shift in the emotional focus of our thoughts, with older adults tending to experience an increase in attention toward positive information, or a "positivity bias," relative to younger adults. Here, we tested if the positivity bias associated with aging can also predict age-related changes in the content of older adults' mind wandering. METHOD: Older adults and younger adults completed a go/no-go task with periodic thought probes to assess rates of emotionally valenced mind wandering. RESULTS: Older adults reported significantly less negatively and neutrally valenced mind wandering compared to younger adults, but there was no age difference in reports of positively valenced mind wandering. Overall rates of mind wandering predicted poorer task performance for both age groups: Individuals who mind wandered more, performed worse, but this did not differ by the emotional valence. Both older adults and younger adults showed similar in-the-moment performance deficits, with mind wandering reports being associated with worse immediate no-go accuracy and faster reaction times, consistent with mindless responding. DISCUSSION: Focusing on different dimensions of thought content, such as emotional valence, can provide new insight into age-related differences in mind wandering. Older adults' mind wandering reports were less negative and neutral compared to younger adults' reports suggesting a positivity bias for older adults. However, this positivity bias does not seem to affect task performance. We discuss the implications of the findings for mind wandering theories and the positivity bias.

Bilingualism and the executive function trade-off: A latent variable examination of behavioral and event-related brain potentials.

The impact of bilingualism on the executive functioning constructs of inhibition, shifting, and updating remains unclear, with prior findings yielding inconsistent results. Several explanations for the lack of congruency have been suggested, including the dependence on observed variables, the impact of test modality on performance, and the need to examine the density of dual languages in the environment. To address these concerns, the current study examined differences between a large group of monolingual (n = 109) and bilingual (n = 152) college students on nonlinguistic behavioral and neural measures of inhibition, shifting, and updating using a latent variable approach. We investigated the impact of test modality by presenting each task in the auditory and visual modalities. Additionally, we examined the effects of language balance and language switching in daily life on the measures of executive functioning. Results revealed greater neural expenditure (i.e., higher ERP amplitude) and weaker performance on tasks assessing response inhibition and shifting abilities in bilinguals. Further, although a neural marker of memory updating did not reveal group differences, performance was stronger in monolinguals. These findings were consistent across test modality. Last, language balance was a stronger predictor of behavioral and neural measures than language switching frequency. Our findings highlight the importance of examining differences at the latent level and exploring the influence of linguistic balance. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

A self-administered, mild form of exposure therapy for older adults.

Despite the effectiveness of exposure therapy to alleviate trauma-related distress, many older adults are unable or unwilling to enter therapy. Mild forms of exposure therapy, such as completing memory questionnaires about a stressful event, have been shown to reduce distress in younger adults. This study attempted to examine the impact of a mild form of exposure therapy in an older adult population. A community-living sample of 263 older adults nominated a stressful event from their lives, and were randomly assigned to either complete questionnaires concerning their memory of the stressful event, or a control task. Results indicated that those who had completed the memory questionnaires about a nominated stressful event evidenced lower levels of distress two weeks later. This effect was stronger for events that were either more recent or had elevated initial levels of distress. These findings suggest an alternative treatment for older adults who have experienced a stressful or traumatic event.

Effects of traumatic stress and perceived stress on everyday cognitive functioning.

Stressful or traumatic events have been shown to impair cognitive functioning on laboratory-based tasks due to stress-related intrusive thoughts and avoidance. However, research on the effects of stress on everyday cognitive functioning has been lacking. A sample of 909 undergraduates completed measures of perceived stress, PTSD symptoms, and everyday cognitive failures. The results revealed that both perceived stress and PTSD symptoms uniquely predicted cognitive failures, even after controlling for a number of potentially confounding variables. Additionally, there was a significant interaction. Participants with low scores on both measures of stress reported the fewest occurrences of everyday cognitive failures. In contrast, participants with elevated scores on either measure of stress reported higher levels of cognitive failures. These results suggest that there are unique negative effects of perceived stress and PTSD symptoms on everyday cognitive functioning and sharpen our understanding of the relationship between stress and cognition.

A Combination of Caffeine, TeaCrine® (Theacrine), and Dynamine® (Methylliberine) Increases Cognitive Performance and Reaction Time Without Interfering With Mood in Adult Male Egamers.

Background Involvement in video game activities and competitive video gaming (esports) is a rapidly growing field. Moreover, there is a marked interest in identifying nutritional supplements to safely improve egamer performance. Methodology We conducted a repeated-measure, randomized crossover study to compare the effects of caffeine (125 mg), caffeine (125 mg) + Dynamine® (75 mg) + TeaCrine® (50 mg) (CDT), and matched placebo across three testing sessions (one week apart) among 50 young male egamers. We tested the effect of each product on multiple measures of cognition, self-reported mood (anxiety, alertness, and headache), and biomarkers of arousal (cortisol and salivary alpha-amylase). We also measured electroencephalogram power during the cognitive tasks. Finally, we tested whether individual differences in xenobiotic metabolism would affect the study outcome measures by genotyping each participant for cytochrome P450 1A2*1F (CYP1A2*1F) allele status. Results Compared to pre-dose, CDT improved performance on the Flanker Test of Inhibitory Control and improved reaction time on the Psychomotor Vigilance Task post-dose. Compared to the placebo, caffeine increased self-reported anxiety whereas the CDT combination increased self-reported alertness. Compared to the CDT combination, caffeine increased self-reported headaches. Physiological measures suggested that increases in delta EEG power and cortisol production are associated with the effects observed in the CDT condition to optimize certain aspects of egamer performance. CYP1A2*1F allele status did not moderate outcome variables between conditions in this study. Conclusions CDT is a safe and effective product for improving cognitive performance among egamers without increasing self-reported anxiety or headaches. EEG changes demonstrate that CDT increased attention to internal processing (i.e., increased cortical delta power) and potentially increased cognitive control (i.e., increased cortical theta frequency), while the increases in cortisol suggest increased energy mobilization. Future work should aim to clarify the physiological underpinnings of CDT-induced changes in performance and examine the effects of CDT under naturalistic egamer conditions.

Stress and cognitive functioning during a pandemic: Thoughts from stress researchers.

In this commentary we discuss a downstream consequence of increases in stress and anxiety during the COVID-19 pandemic. Stress and anxiety can lead to mind wandering, which in turn competes for limited cognitive resources. We encourage researchers to be understanding and patient concerning the inevitable cognitive impact of the pandemic and subsequent reduced productivity levels from our students, colleagues, and ourselves. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Sex Matters: Anxiety and Aggression Predict Cortisol Responsivity in Men but Not Women.

BACKGROUND: Sexual dimorphism in the hypothalamic pituitary adrenal (HPA) axis can influence sex-specific patterns of response to stressors. While a host of findings exist on sex differences in stress-induced activity of the HPA axis and associated mechanisms in rodents, less is known about the intricacies of sex differences in stress responsivity in humans. Accordingly, the overall aim of the present study was to investigate psychological variables that may account for differences in the cortisol stress response between men and women. METHODS: Eighty-six participants filled out self-report measures of anxiety (STA-Y), aggression (BPAQ), and happiness (SHS). We then exposed all participants to a one-minute Cold Pressor Test (CPT) that was maintained between 3-5° C. Cortisol and pain ratings were assessed. We focused on the 20-minute time point for cortisol since that is when cortisol is near its peak post-stress. RESULTS: Women reported higher pain ratings compared to men. Women also showed a positive relationship between pain ratings and cortisol. Aggression was significantly related to cortisol levels in men, but not in women. Similarly, trait anxiety was positively related to cortisol levels in men, but not in women. Happiness was unrelated to cortisol levels in women and men. Follow-up regressions were conducted separately for men and women. A significant model was found for cortisol in men only with trait anxiety, aggression, and the interaction between trait anxiety and aggression. CONCLUSIONS: The current study builds on previous reports by showing that aggression and anxiety differentially influence the cortisol response to an acute stress in men and women.