Intraindividual Fluctuations Research Articles

Too depressed and anxious to speak up: The relationships between weekly fluctuations in mental health and silence at work.

While it is widely acknowledged that some employees are more prone to silence than others, emerging research suggests that silence is much more dynamic than previously indicated, as even the most vocal employee will withhold input in some situations. However, given scant empirical attention to intraindividual fluctuations in silence, several important questions remain regarding its etiological antecedents, the mechanisms underlying such effects, and potential factors mitigating them. We respond by integrating the silence and mental health literature to consider how fluctuations in employees' experiences of depression and anxiety relate to fluctuations in silence via distinct silence motives. Specifically, we propose that employees are likely to engage in silence while experiencing episodes of depression because depressive symptomology shifts perceptions toward voice being pointless (i.e., ineffectual silence motive). Likewise, we propose that employees are likely to engage in silence while experiencing flare-ups of anxiety because anxious symptomology shifts perceptions toward voice being dangerous (i.e., defensive silence motive). Finally, we argue that voice endorsement attenuates these relationships by interrupting the link between silence motives and behaviors, such that employees experiencing heightened ineffectual and defensive silence motives are less likely to remain silent during weeks in which they experience high voice endorsement. We find support for these predictions via an experience sampling methodology study conducted with 136 employees across 4 weeks. We discuss how these results enhance theoretical clarity on the dynamic links between mental health and silence and offer insights into how organizations can counteract intrapersonal variations in silence. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Resting respiratory sinus arrhythmia moderates the within-person relations of parental emotional expressivity and children's prosocial behaviors.

Parental supportive emotional expressivity could contribute to children's prosocial behaviors, and such an effect may differ for children with different levels of resting respiratory sinus arrhythmia (RSA). This study disentangled the stable differences across dyads (i.e., between-person effects) from the dynamic associations between parental expressivity and children's prosocial behaviors within dyads (i.e., within-person effects) and determined how resting RSA functioned as a susceptibility factor in such effects. The longitudinal design consisted of three measurements with a 1-year interval performed among 208 school-aged children (48.6% girls; Han nationality) and their parents (153 mothers and 55 fathers). The initial measurement was conducted when the children were 7 years old (Mage =7.13, SDage =.33). Resting RSA was calculated at the first measurement; parents reported children's prosocial behaviors and parental expressivity at each of the three measurements. The results demonstrated significant between- and within-person effects of parental expressivity on children's prosocial behaviors and found a moderating role of children's resting RSA in the within-person effects. These findings suggest that children displayed more prosocial behaviors when parents showed more supportive expressivity both across and within dyads, and higher resting RSA operated as a differential susceptibility factor in the intraindividual fluctuations in parental expressivity.

Reduced REM and N2 sleep, and lower dream intensity predict increased mind-wandering.

Mind-wandering is a mental state in which attention shifts from the present environment or current task to internally driven, self-referent mental content. Homeostatic sleep pressure seems to facilitate mind-wandering as indicated by studies observing links between increased mind-wandering and impaired sleep. Nevertheless, previous studies mostly relied on cross-sectional measurements and self-reports. We aimed to combine the accuracy of objective sleep measures with the use of self-reports in a naturalistic setting in order to examine if objective sleep parameters predict the tendency for increased mind-wandering on the following day. We used mobile sleep electroencephalographic (EEG) headbands and self-report scales over 7 consecutive nights in a group of 67 healthy participants yielding ~400 analyzable nights. Nights with more wakefulness and shorter REM and slow wave sleep were associated with poorer subjective sleep quality at the intraindividual level. Reduced REM and N2 sleep, as well as less intense dream experiences, predicted more mind-wandering the following day. Our micro-longitudinal study indicates that intraindividual fluctuations in the duration of specific sleep stages predict the perception of sleep quality as assessed in the morning, as well as the intensity of daytime mind-wandering the following hours. The combined application of sleep EEG assessments and self-reports over repeated assessments provides new insights into the subtle intraindividual, night-to-day associations between nighttime sleep and the next day's subjective experiences.

Variability across time in implicit weight-related bias: Random noise or meaningful fluctuations?

Social psychologists have struggled with the vexing problem of variability over time in implicit bias. While many treat such variability as unexplainable error, we posit that some temporal variability, whether within persons or across society at large, reflects meaningful and predictable fluctuation based on shifts in the social-cultural context. We first examined fluctuations at the group-level in a Project Implicit data set of female participants who completed the Weight Implicit Association Test between 2004 and 2018 (N = 259,613). Extending our prior work showing that mass media celebrity fat-shaming increased women's implicit antifat bias, we show that celebrity body positivity events reduced such bias (Study 1a). We then focused on a specific form of body positivity-that is, celebrity "push-back" in response to fat-shaming. Whereas fat-shaming without antibias push-back was associated with spikes in negative weight attitudes, fat-shaming with push-back showed no change in such bias (Study 1b). Critically, however, closer analysis revealed that this apparent stability was due to the canceling out of opposing negative (fat-shaming) and subsequent positive (body positivity) influences-an effect that was obscured when the window of observation was expanded. Finally, in Study 2, we examined parallel effects at the individual level in a daily diary study. Consistent with the group-level, between-subjects data, women's intraindividual fluctuations in implicit attitudes were reliably predicted based on prior-day exposure to fat-shaming and/or body positivity influences. Taken together, our work highlights how both group- and individual-level variability across time can be meaningfully explained rather than treated as unexplainable or left as unexplained. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Effects of strain on boundary management: findings from a daily diary study and an experimental vignette study.

Transformations in the work-nonwork interface highlight the importance of effectively managing the boundaries between life domains. However, do the ways individuals manage the boundaries between work and nonwork life change from one day to the next? If so, which antecedents may explain these intra-individual fluctuations in boundary management? Drawing on boundary management, spillover, and resource theories, we investigate daily changes in segmentation preferences and integration enactments as a function of experiencing strain in work and nonwork life. Assuming that changes in segmentation preferences reflect an individual's strategy to regulate negative cross-role spillover, we suppose that strain increases individuals' segmentation preferences; at the same time, however, it could force individuals to enact more integration. We test our assumptions with data from two studies with different methodological approaches. The first study uses a daily diary research design (Study 1, 425 participants with 3,238 daily observations) in which full-time professionals rated strain in work and nonwork life, segmentation preferences, and integration enactments every evening for 10 workdays. The second study uses an experimental vignette research design (Study 2, 181 participants), where we experimentally manipulated strain in work and nonwork life and investigated causal effects on participants' hypothetical segmentation preferences. The results of multilevel modeling analyses in Study 1 show that segmentation preferences and integration enactments fluctuate from day to day as a function of strain. More specifically, strain is related to preferring more segmentation but enacting more integration. Study 2 replicates the results of Study 1, showing that strain causally affects segmentation preferences. This two-study paper is one of the first to address daily fluctuations in segmentation preferences and integration enactments, extending our knowledge of temporal dynamics in boundary management. Furthermore, it demonstrates that strain is an antecedent of these daily fluctuations, offering starting points for practical interventions.

Brain Connectivity Correlates of Cognitive Dispersion in a Healthy Middle-Aged Population: Influence of Subjective Cognitive Complaints.

Cognitive dispersion, representing intraindividual fluctuations in cognitive performance, is associated with cognitive decline in advanced age. We sought to elucidate sociodemographic, neuropsychological, and brain connectivity correlates of cognitive dispersion in middle age, and further consider potential influences of the severity of subjective cognitive complaints (SCC). Five hundred and twenty healthy volunteers from the Barcelona Brain Health Initiative (aged 40-66 years; 49.6% females, 453 with magnetic resonance imaging acquisitions) were included and stratified into high and low SCC groups. Two analysis steps were undertaken: (1) for the whole sample and (2) by groups. Generalized linear models and analysis of covariance were implemented to study associations between cognitive dispersion and performance (episodic memory, speed of processing, and executive function), white matter integrity, and resting-state functional connectivity (rs-FC) of the default mode network (DMN) and dorsal attentional networks (DAN). Across-domain dispersion was negatively related to cognitive performance, rs-FC within the DMN, and between the DMN and the DAN, but not to white matter integrity. The rs-FC values were not explained by cognitive performance. When considering groups, the above findings were significant only for those with high SCC. In healthy middle-aged individuals, high cognitive dispersion was related to poorer cognition and DMN dysregulation, being these associations stronger among subjects with high SCC. The present results reinforce the interest in considering dispersion measures within neuropsychological evaluations, as they may be more sensitive to incipient age-related cognitive and functional brain changes than traditional measures of performance.

Does Instagram make you speak ill of others or improve yourself? A daily diary study on the moderating role of malicious and benign envy

Social networking site users are constantly exposed to the glamorized lifestyles and over-positive profiles of other people. A great deal of investigation has shown that the use of social networking sites is linked to the experience of upward comparison, yielding both threat-oriented and challenge-oriented responses. Yet, limited research has studied what determines these differential responses. To capture the intraindividual fluctuations in online activities, a daily diary study (1,328 diary reports) was conducted to examine the associations between Instagram use and two unexplored and sharply different reactions, namely 1) gossiping, a threat-oriented reaction that aims to pull others down, and 2) self-improvement, a challenge-oriented reaction that leads one to level up. Results indicated that daily Instagram use was positively associated with both gossiping and self-improvement. Critically, these within-person associations were subjected to the cross-level moderation effects of one’s dispositional malicious and benign envy. Specifically, the link between Instagram use and gossiping was stronger among those high in dispositional malicious envy, while the link between Instagram use and self-improvement was stronger among those high in dispositional benign envy. Finally, a series of comparisons was conducted on the within-person associations and cross-level moderations to strengthen our understanding of Instagram use

The Power Dynamics of Friendship: Between- and Within- Person Associations among Friend Dominance, Self-Esteem, and Adolescent Internalizing Symptoms.

Although forming close, egalitarian peer relationships is a central developmental task of adolescence, little is known about the psychological consequences of power imbalances in adolescents' friendships. The current study investigated whether there are psychological costs of feeling subordinate to friends by examining longitudinal associations between adolescents' perceived friend dominance and internalizing symptoms. Across one year, five waves of survey data were collected from 388 adolescents (Mage = 14.05, SDage = 0.41; 61% female; 46% White, 19% Black, 17% Asian, 6% Arab, Middle Eastern, North African, 6% Biracial/Multiethnic, 3% Latinx/Hispanic, 1% American Indian/Native American, 1% identifying with another race/ethnicity, <1% not reporting). Multilevel modeling disentangled between- and within-person effects of perceived friend dominance on depressive and anxiety (internalizing) symptoms and tested self-esteem as a mediator. The results indicated that both individual differences and intraindividual fluctuations in perceived friend dominance were associated with internalizing symptoms. At the between-person level, adolescents who perceived their friends as more dominant reported more severe depressive and anxiety symptoms than adolescents who perceived their friends as less dominant. At the within-person level, increases in perceived friend dominance were accompanied by increases in depressive and anxiety symptoms, and these associations were partially explained by changes in self-esteem. The findings advance understanding of power dynamics in adolescents' close friendships and highlight the psychological toll of feeling dominated by friends.

The Association between Mood, Inhibitory Control and Depressive Symptoms: An Ecological Momentary Assessment Study

IntroductionCognitive models of depression highlight the role of inhibitory control - the cognitive control ability which supports our goal directed behavior – as key and even causal feature of the disorder. According to these models, deficits in inhibitory control prevent the exclusion of irrelevant negative information, leading to rumination and sustained negative mood which result in depressive episodes. However, the scientific evidence linking deficits in inhibitory control to depression is thus far mixed. Moreover, although one’s inhibitory control ability may fluctuate, it is often assessed using a single-time measurement in the lab.ObjectivesHere we aimed to assess the association between intra-individual fluctuations in inhibitory control measured in ecological settings, daily mood states, and depressive symptoms.MethodsN=106 participants (Mean age: 38 ± 10 years; range: 19-62 years; 68% female) reported their depressive symptoms (using the PHQ-9 scale) and completed a mobile version of the Go-NoGo inhibition task at baseline. They then completed a 5-day ecological-momentary-assessment (EMA) protocol, in which they reported their current mood (using the IMS-12 scale) and performed a shortened version of the Go-NoGo task twice/day using a mobile application. Depressive symptoms were assessed again following the 5-day EMA. Hierarchical-linear-modeling (HLM) was applied to examine the association between momentary IC and mood, with post-EMA depressive symptoms as a moderator. Inhibitory control was included as a time-varying predictor for mood in the 1st step, and depressive symptoms post-EMA and their interaction with inhibition were included in the 2nd step.ResultsAt baseline, there were no correlations between depressive symptoms and inhibitory control (rp = .035, n.s). However, individuals with elevated depressive symptoms demonstrated worse and more variable inhibition performance over time (rp = .29, p = .002), as captured in the EMA measures. In addition, participants with more variable inhibitory control performance over time also reported more depressive symptoms at the end of the 5-day period (rp = .27, p = .006). Finally, post-EMA depressive symptoms moderated the association between momentary inhibitory control and daily mood, such that reduced inhibition was associated with more negative mood only for those with lower, but not with higher, depressive symptoms (Figure 1).Image:ConclusionsVariable, rather than mere reduced inhibitory control is related to depressive symptoms. Moreover, the role of inhibition in modulating mood differs in non-depressed vs. depressed individuals. These findings contribute to our understanding of inhibition and mood in real life and help account for some of the discrepant findings related to cognitive control models of depression. Future investigations should examine the validity of these outcomes in other, clinical samples.Disclosure of InterestNone Declared

Accurate Prediction of Momentary Cognition From Intensive Longitudinal Data

BackgroundDeficits in cognitive performance are implicated in the development and maintenance of psychopathology. Emerging evidence further suggests that within-person fluctuations in cognitive performance may represent sensitive early markers of neuropsychiatric decline. Incorporating routine cognitive assessments into standard clinical care—to identify between-person differences and monitor within-person fluctuations—has the potential to improve diagnostic screening and treatment planning. In support of these goals, it is critical to understand to what extent cognitive performance varies under routine, remote assessment conditions (i.e., momentary cognition) in relation to a wide range of possible predictors. MethodsUsing data-driven, high-dimensional methods, we ranked strong predictors of momentary cognition and evaluated out-of-sample predictive accuracy. Our approach leveraged innovations in digital technology, including ambulatory assessment of cognition and behavior 1) at scale (n = 122 participants, n = 94 females), 2) in naturalistic environments, and 3) within an intensive longitudinal study design (mean = 25.5 assessments/participant). ResultsReaction time (R2 > 0.70) and accuracy (0.56 >R2 > 0.35) were strongly predicted by age, between-person differences in mean performance, and time of day. Effects of self-reported, intraindividual fluctuations in environmental (e.g., noise) and internal (e.g., stress) states were also observed. ConclusionsOur results provide robust estimates of effect size to characterize sources of cognitive variability, to support the identification of optimal windows for psychosocial interventions, and to possibly inform clinical evaluation under remote neuropsychological assessment conditions.

Within-person associations of optimistic and pessimistic expectations with momentary stress, affect, and ambulatory blood pressure

ABSTRACT Background and Objectives: Although dispositional optimism and pessimism have been prospectively associated with health outcomes, little is known about how these associations manifest in everyday life. This study examined how short-term optimistic and pessimistic expectations were associated with psychological and physiological stress processes. Methods: A diverse sample of adults (N = 300) completed a 2-day/1-night ecological momentary assessment and ambulatory blood pressure (ABP) protocol at ∼45-minute intervals. Results: Moments that were more optimistic than typical for a person were followed by moments with lower likelihood of reporting a stressor, higher positive affect (PA), lower negative affect (NA), and less subjective stress (SS). Moments that were more pessimistic than typical were not associated with any affective stress outcome at the following moment. Neither optimism nor pessimism were associated with ABP, and did not moderate associations between reporting a stressor and outcomes. Discussion: These findings suggest that intraindividual fluctuations in optimistic and pessimistic expectations are associated with stressor appraisals.

The within-person relationship of school climate and mental wellbeing in adolescence

Abstract Background School climate is recognized as important for adolescent mental wellbeing. However, there is a lack of longitudinal studies, and most research focus on school climate as an antecedent of mental wellbeing while the relation could be in the opposite direction or bidirectional. Further, no study has examined this relation with analyses that separate between- from within-person variability to properly assess intraindividual developmental processes. Methods Using a random-intercept cross-lagged panel model we investigated the longitudinal reciprocal relations of perceptions of a caring school climate and mental wellbeing across three time points (T1, T2, T3) in adolescence, and if socioeconomic position (SEP) predicted perceptions of a caring school climate and mental wellbeing at each time point. The sample consisted of 1508 Norwegian adolescents (60.7% female; baseline mean age = 16.33, SD = .62). Results Results showed positive cross-lagged effects at the within-person level from mental wellbeing to later perceptions of a caring school climate across all time points (T1-&amp;gt;T2 b=.12* [.01, .22], T2-&amp;gt;T3 b=.12* [.01, .23]), but no similar effects in the opposite direction. Positive concurrent effects from SEP were observed at one time point for mental wellbeing (T1 b=.10* [.01, .19]), and all time points for perceptions of a caring school climate (T1 b=.12* [.02, .22], T2 b=.11* [.02, .20], T3 b=.12* [.02, .22]), indicating SEP to be related to intraindividual fluctuations mainly in perceptions of a caring school climate. Conclusions The findings support a unidirectional temporal relationship from mental wellbeing to perceptions of a caring school climate and underscore the importance of investigating the subject longitudinally and as a function of within-person fluctuations. From a public health view, the findings support the importance of systematic efforts to promote mental wellbeing to facilitate positive school experiences of adolescents of all social classes. Key messages • The study found a unidirectional temporal relation at the within-person level in adolescents where mental wellbeing predicted perceptions of a caring school climate, but not the other way around. • The findings underline the importance of systematic public health efforts to promote mental wellbeing as one avenue to facilitate positive school experiences of adolescents of all social.

Tumor Mutational Burden by Whole-Genome Sequencing in Resected NSCLC of Never Smokers.

Data are scarce about tumor mutational burden (TMB) as a biomarker in never smokers with non-small cell lung cancer (NSCLC). TMB was assessed by whole-genome sequencing (WGS) and compared with in silico reduced whole-exome sequencing (WES) and targeted commercial next-generation sequencing (NGS) gene panels in 92 paired tumor-normal samples from never smokers who underwent NSCLC resection with curative intent. Analyses were performed to test for association with survival after surgery and to identify the optimal prognostic TMB cutoff. Tumors of never smokers with NSCLC had low TMB scores (median 1.57 mutations/Mb; range, 0.13-17.94). A TMB cutoff of 1.70 mutations/Mb was associated with a 5-year overall survival of 58% in the high-TMB (42% of cases) compared with 86% in low-TMB patients (Wald P = 0.0029). TMB scores from WGS and WES were highly correlated (Spearman ρ = 0.93, P < 2.2e-16). TMB scores from NGS panels demonstrated high intraindividual fluctuations and identified high-TMB patients with 65% concordance in average compared with WGS. In resected NSCLC of never smokers, high TMB was associated with worse prognosis. WES provided a good estimate of TMB while targeted NGS panels seem to lack adequate depth and resolution in the setting of low mutation burden. TMB is a prognostic indicator of survival in resected NSCLC from individuals who never smoked. In this setting of low mutation counts, TMB can be accurately measured by WGS or WES, but not NGS panels.

Variability in caregiver attention bias to threat: A Goldilocks effect in infant emotional development?

Attention biases to threat are considered part of the etiology of anxiety disorders. Attention bias variability (ABV) quantifies intraindividual fluctuations in attention biases and may better capture the relation between attention biases and psychopathology risk versus mean levels of attention bias. ABV to threat has been associated with attentional control and emotion regulation, which may impact how caregivers interact with their child. In a relatively diverse sample of infants (50% White, 50.7% female), we asked how caregiver ABV to threat related to trajectories of infant negative affect across the first 2 years of life. Families were part of a multi-site longitudinal study, and data were collected from 4 to 24 months of age. Multilevel modeling examined the effect of average caregiver attention biases on changes in negative affect. We found a significant interaction between infant age and caregiver ABV to threat. Probing this interaction revealed that infants of caregivers with high ABV showed decreases in negative affect over time, while infants of caregivers with low-to-average ABV showed potentiated increases in negative affect. We discuss how both high and extreme patterns of ABV may relate to deviations in developmental trajectories.

Creating a creative state of mind: Promoting creativity through proactive vitality management and mindfulness

AbstractMost research on employee creativity has been focused on relatively distal antecedents, such as personality or job characteristics, which has resulted in top‐down organizational approaches to promote employee creativity. However, such approaches overlook the self‐regulating potential of employees and may not explain intraindividual fluctuations in creativity. In the present research, we build on proactive motivation theory to examine how employees may promote their own creativity on a daily basis through the use of proactive vitality management (PVM). To better understand the PVM‐creativity link, we zoom in on this process by examining the role of mindfulness as an underlying mechanism. In two daily diary studies, employees from the United States (N = 133 persons, n = 521 data points) and the creative industry in Germany (N = 62 persons, n = 232 data points) reported on their use of PVM and states of mindfulness for five consecutive workdays. Additionally, participants completed a daily creativity test (brainstorming task) in Study 1, whereas supervisors rated participants' daily creative work performance in Study 2. In both studies, multilevel analyses showed that daily PVM was positively related to creative performance through daily mindfulness, supporting our hypotheses. These replicated findings suggest that individuals may bring themselves in a cognitive, creative state of mind on a daily basis, emphasizing the importance of proactive behavior in the creative process.

It Takes Time: Vigilance and Sustained Attention Assessment in Adults with ADHD.

Objectives: The present study compares the utility of eight different tests of vigilance and sustained attention in the neuropsychological examination of adults with Attention-deficit/hyperactivity disorder (ADHD). Methods: Thirty-one adults diagnosed with ADHD performed eight tests for vigilance and sustained attention, spread over three assessment days. Results: Adults with ADHD showed cognitive impairments in most tests and test variables, even though their sensitivity differed greatly. No specific type of test variable stands out to be the most sensitive, and no evidence for a differential deterioration of performance over time was observed. Conclusion: This study underscores the role of vigilance and sustained attention tests in the assessment of adult ADHD. It is further concluded that summary scores over the entire test duration are sufficient, but that all variables of a test should be considered. Finally, we hypothesize that reassessment on a different day may benefit a more accurate clinical assessment of adults with ADHD, in order to adequately take intraindividual fluctuations and limitations regarding test reliability into account.

Factors impacting performance on the 6-minute walk test by people with late-onset Pompe disease.

Pompe disease is a progressive myopathy that combines motor, respiratory, and cardiac impairments. The 6-min walk test is the gold standard for assessing disease severity at the motor level. The objective of this study was to better determine the parameters that influence the total distance covered in patients with Pompe disease. We performed a retrospective review of 15 patients with late-onset Pompe disease who were followed regularly at a single referral center. Logistic regression was used to investigate the links between motor, respiratory and cardiac variables and 6-min walk test performance. When considering baseline clinical and demographic variables, a seven-step backward elimination regression analysis yielded a model with two predictors (age and the use of an assistive device) that explained 85.5% of the variance. When considering the cardiorespiratory variables monitored during gait, a three-step backward elimination regression analysis showed that two predictors (heart rate recovery and the baseline partial pressure of carbon dioxide) explained 42.2% of the variance. Our results highlighted the importance of respiratory and cardiac adaptation during exercise (along with motor ability) during the 6-min walk test in patients with Pompe disease. Further studies of larger cohorts are necessary to validate the model, which might enable investigators to determine whether intra-individual fluctuations in 6-min walk test performance are related to physiological parameters and/or to other variables such as the patient's level of motivation during the test.

Intraindividual fluctuations in sleep predict subsequent goal setting in adolescents

The purpose of this study was to investigate within- and between-person associations between sleep and subsequent goal setting in adolescents. We conducted an intensive repeated measures longitudinal study to assess intra- and inter-individual associations between sleep and goal setting and potential moderators of such associations. Thirty-nine seventh through 12th graders reported on their sleep quality and propensity to set goals in their daily lives several times per week for approximately four months. We used a combination of multilevel modeling with time-varying covariates and centering techniques to partition within- and between-person variance. We found significant and positive associations between sleep and goal setting within individuals, but no such associations between individuals. That is, students were more likely to set goals for their work after getting a good night’s sleep relative to their own average sleep quality, but getting good sleep on average relative to other individuals showed no association with average goal setting. These relationships were not moderated by participant age, gender, or sociodemographic status as indexed by maternal education. Differences in average sleep between adolescents matters less for their propensity to set goals than whether they experienced better- or worse-than-usual sleep the previous night given their own average. This finding represents the first evidence documenting effects of sleep on goal setting, which is an important psychological precursor to many youth behavioral and achievement outcomes. Our findings highlight the individuality of sleep needs and point to new directions for sleep-related practice and policy aimed at youth.

Prior sleep timing and visual recognition of emotional faces in 6-month-old infants

Face recognition is an important mnemonic ability for infants when navigating the social world. While age-related changes in face processing abilities are relatively well documented, less is known about short-term intra-individual fluctuations in this ability. Given that sleep deprivation in adults leads to impairments in information processing, we assessed the role of prior sleep on 6-month-old infants’ (N = 17) visual recognition of faces showing three emotional expressions (neutral, sad, angry). Visual recognition was inferred by assessing novelty preferences for unfamiliar relative to familiarized faces in a visual recognition memory paradigm. In a within-subject design, infants participated once after they had recently woken up from a nap (nap condition) and once after they had been awake for an extended period of time (awake condition). Infants failed to show visual recognition for the neutral faces in either condition. Infants showed recognition for the sad and angry faces when tested in the awake condition, but not in the nap condition. This suggests that timing of prior sleep shapes how effectively infants process emotionally relevant information in their environment.

Real-time fluctuations in mindful awareness, willingness, and values clarity, and their associations with craving and dietary lapse among those seeking weight loss

BackgroundMindful awareness, willingness and values clarity have been examined as protective factors across a wide range of problems, including overweight/obesity. However, these variables have almost exclusively been examined at the trait-level. It is possible that these variables also fluctuate within individuals in daily life, and that these intraindividual fluctuations may in turn be related to food craving and dietary lapse. The current study used ecological momentary assessment (EMA) to examine the extent to which momentary mindful awareness, willingness, and values clarity varied within-person, and were associated with craving and likelihood of dietary lapse among weight-loss seeking individuals with overweight/obesity prior to starting a weight loss program. We also examined the extent to which craving was associated with dietary lapse. MethodsAdults with overweight/obesity (N = 126) completed one week of EMA prior to enrolling in a randomized controlled trial of behavioral weight loss treatments. They responded to EMA questions assessing dietary lapses, craving, mindful awareness, willingness, and values clarity six-times per day. ResultsMindful awareness, willingness, and values clarity demonstrated substantial within-person variability, and higher within-person mindful awareness, willingness, and values clarity were concurrently (but not prospectively) associated with lower craving and likelihood of dietary lapse. Higher craving was concurrently (but not prospectively) associated with higher likelihood of dietary lapse. Between-person, higher mindful awareness, willingness, and values clarity were associated with lower craving and likelihood of dietary lapse, and higher craving was associated with greater frequency of dietary lapses. ConclusionMindful awareness, willingness, and values clarity vary substantially at the daily level, and may be important mechanisms to target to reduce craving and dietary lapses in the daily lives of individuals with overweight/obesity.