The Chronotype-Academic Performance Model (CAM): Daytime sleepiness and learning motivation link chronotype and school performance in adolescents

Many adolescents experience a discrepancy between their biological time, which is shifted toward eveningness, and early school starting times. Due to this social jetlag, eveningness is negatively correlated with school performance. On the basis of the here presented data, we derived a model for the association of chronotype and school performance, the Chronotype-Academic Performance Model (CAM), including daytime sleepiness and achievement motivation as mediating factors. The sample comprised N = 273 adolescents aged 14–16 years. Circadian preference, daytime sleepiness, learning and achievement motivation, and information about participants’ last school certificate were assessed online. Chronotype was not directly related to academic performance, but was mediated by daytime sleepiness and learning motivation. Morning-orientation was negatively associated with daytime sleepiness and positively with learning motivation, which, in turn, affected performance. In evening-types, we found the strongest association between sleepiness and refusal to work. The CAM suggests that chronotype may not directly influence academic performance, but be mediated by daytime sleepiness and learning motivation. Evening types seem to be at high risk to suffer from daytime sleepiness and to display dysfunctional attitudes toward work. Measures of reducing sleepiness and modifying attitudes toward academic achievement might attenuate the disadvantages of evening-types due to social jetlag.     

Synchronising movements with the sounds of a virtual partner enhances partner likeability

Previous studies have demonstrated that synchronising movements with other people can influence affiliative behaviour towards them. While research has focused on synchronisation with visually observed movement, synchronisation with a partner who is heard may have similar effects. We replicate findings showing that synchronisation can influence ratings of likeability of a partner, but demonstrate that this is possible with virtual interaction, involving a video of a partner. Participants performed instructed synchrony in time to sounds instead of the observable actions of another person. Results show significantly higher ratings of likeability of a partner after moving at the same time as sounds attributed to that partner, compared with moving in between sounds. Objectively quantified synchrony also correlated with ratings of likeability. Belief that sounds were made by another person was manipulated in Experiment 2, and results demonstrate that when sounds are attributed to a computer, ratings of likeability are not affected by moving in or out of time. These findings demonstrate that interaction with sound can be experienced as social interaction in the absence of genuine interpersonal contact, which may help explain why people enjoy engaging with recorded music.     

I Did OK,but Did I Like It? Using Ecological Momentary Assessment to Examine Perceptions of Social Interactions Associated With Severity of Social Anxiety and Depression

Socially anxious and depressed individuals tend to evaluate their social interactions negatively, but little is known about the specific real-time contributors to these negative perceptions. The current study examined how affect ratings during social interactions predict later perceptions of those interactions, and whether this differs by social anxiety and depression severity. Undergraduate participants (N = 60) responded to a smartphone application that prompted participants to answer short questions about their current affect and social context up to 6 times a day for 2 weeks. At the end of each day, participants answered questions about their perceptions of their social interactions from that day. Results indicated that the link between negative affective experiences reported during social interactions and the end-of-day report of enjoyment (but not effectiveness) of those experiences was more negative when social anxiety was more severe. The link between negative affective experiences rated during social interactions and the end-of-day report of effectiveness (but not enjoyment) during those social encounters was more negative when depression was more severe. These findings demonstrate the importance of examining self-perceptions of social interactions based both on the extent to which individuals think that they met the objective demands of an interaction (i.e., effectiveness, mastery) and the extent to which they liked or disliked that interaction (i.e., enjoyment, pleasure). These findings also highlight how real-time assessments of daily social interactions may reveal the key experiences that contribute to negative self-evaluations across disorders, potentially identifying critical targets for therapy.     

A Time-Series Diary Study of Mood and Social Interaction

Based on concomitant time-series analyses, the results of this study support distinct social interaction correlates for the mood dimensions of negative affect (NA) and positive affect (PA). Participants (N = 25) completed structured diaries three times daily for 4 weeks assessing their PA, NA, and participation in five types of social interaction. A significant number of participants' data series evidenced significant positive correlations between PA and fun/active and necessary/informational types of social interaction, and between NA and arguing/confronting and receiving help/support, during synchronous diary periods. Providing help/support was not related to NA or PA. No hypothesized time-lagged relations between mood and social interaction variables were present suggesting that, if these associations exist, they may be at intervals shorter than the one third day recording frequency used in this study. Results are discussed in the context of research on mood, social interaction, and time-series analysis.     

Decoding deficits and social competency: A continuous rating approach

Males who self-reported heterosocial difficulties and whose performance in a role-played interaction was judged to be of low social competence were compared to high-competent males on a continuous rating task. The rating task required that subjects make continual, ongoing social competency ratings of their own and six other males' performance in a role-play situation. The continuous measurement of performance provided a profile of ratings that was compared on frequency, latency-to-first ratings, profile elevation or level, scatter, and patterning. Low-competent males had longer latencies-to-first ratings than high-competent males and less scatter in their continuous ratings than did the high-competent group. The reduced scatter effect for continuous ratings replicates previous work done with global ratings and suggests that the low-competent group may not be able to discriminate among social stimuli as well as the high-competent group. The research also suggests that the continuous rating methodology may hold promise as a tool to investigate social perception processes.     

The self-reported causes of sleepiness in shift-working tram and truck drivers

Identifying the causes of sleepiness in various safety-critical work environments is necessary for implementing more efficient fatigue management strategies. In transportation, little is known about drivers’ own perceptions of these causes. Therefore, we instructed shift-working tram (n = 23) and long-haul truck drivers (n = 52) to report at the end of their shifts what made them sleepy if they felt so. These self-reports, measured on-duty sleepiness, and sleep amounts were recorded on every shift over a period of 2–3 weeks per driver. The causes of sleepiness were queried with smartphone applications and sleep logs. Sleepiness was measured with the Karolinska Sleepiness Scale (KSS) and sleep with wrist-worn actigraphs. Data were analyzed using generalized estimating equations. Sleep loss and insufficient rest breaks were commonly reported as causing sleepiness among the tram drivers, whereas time of day and sleep loss were the leading causes among the truck drivers. Other causes, such as traffic or cabin conditions, were not frequently mentioned. During morning, day, and evening shifts, the truck drivers were less likely to report insufficient rest breaks as causing sleepiness than the tram drivers. Similarly, during morning shifts, the truck drivers were less likely to attribute their sleepiness to sleep loss. In shifts with drives reporting severe sleepiness (KSS ≥ 7 at least once, 18–21% of shifts), sleep loss was significantly reported as causing sleepiness among both groups. Reporting insufficient rest breaks was associated with severe sleepiness among the tram drivers, whereas time of day showed the same among the truck drivers. The results highlight the need for addressing sleep-related fatigue in transportation and provide directions for future research with regard to secondary causes of sleepiness.     

Job stress and task interest: Two factors in work life quality

A study of how stressful job events and task interest are associated with quality of work life was conducted through interviews and questionnaire assessment of 56 members of the nursing staff at a psychiatric hospital. Factor analyses of work life satisfactions revealed two separable factors, one that accounted for satisfaction with the work itself and another that identified level of satisfaction with the work context. As predicted by a two-factor model, the number of stressful work events correlated with dissatisfactions with the work context but not with satisfaction with the work itself. Level of task interest was associated with higher ratings of satisfaction with the work itself and was uncorrelated with level of work context satisfaction. Turnover was predicted by both the number of stressors on the job and a lack of interest in tasks. An interaction was found between these two variables predicting turnover; employees tended to stay at work even if the job was stressful when the tasks were interesting.     

A sleep physiologist's view of the drowsy driver

Drowsy driving is dangerous because of the impairment of driving skills that it causes. Unfortunately, the conceptual basis that underlies much of the multi-disciplinary research on this topic is muddled. The same poorly defined terms, such as fatigue and sleepiness, are used differently by different disciplines and researchers. Some new definitions and concepts are proposed here which may be helpful, as least as a stimulus for discussion by others. Drowsiness, sleepiness and fatigue are distinguished. A new conceptual model of sleepiness is outlined, based on a mutually inhibitory interaction between a putative sleep drive and a wake drive. Sleepiness, defined as sleep propensity, is a function of the relative strengths, not the absolute strengths, of the sleep and wake drives. The measurement of sleepiness requires some new variables such as instantaneous sleep propensity, to be distinguished from either the situational or the average sleep propensity. A subject's instantaneous sleep propensity depends on many variables including his average sleep propensity in daily life, the time of day, the duration of prior wakefulness, the subject's posture, physical and mental activity at the time, and individual differences based on psychophysiological traits. The relationship between dozing at the wheel while driving and crashing the vehicle may not be as straightforward as it appears at first.     

Maternal and Paternal Perceptions of Social Competence in Children and Adolescents

We examined maternal and paternal perceptions of social competence in children and adolescents. One hundred forty-seven parents rated scenarios depicting children who varied in age, gender, and social competence. Parents also completed questionnaires assessing the amount of time they spend with their own children, their gender identity, their psychological symptoms, and their affectivity. Results indicated that the amount of time parents spend with their own children was related to maternal and paternal ratings, whereas affectivity was related to paternal ratings. In contrast, parents’ gender identity and psychological symptoms were unrelated to their ratings of social competence. Finally, there was an interaction between parent gender and the level of social competence depicted in the scenarios they rated, suggesting that there were differences in maternal and paternal ratings. These findings emphasize the importance of examining the perceptions of both mothers and fathers when assessing social competence in children and adolescents.     

Social pretend play and social interaction in preschoolers

Social interaction was observed during social pretend play and nonpretend activities to determine whether positive and mature social behaviors were differentially associated with the pretend context. A within-subjects design and a semistructured play setting were used to control for individual differences, child and environmental effects. Thirty-seven 4- and 5-year-old children were observed in groups of four for 47.5 minutes, in a series of play sessions. Their interactions within social pretend play and social nonpretend activities were observed and compared. The results indicated that during pretend play, children's social interactions were more enjoyable, lasted longer, involved larger groups, and showed more play involvement and greater reciprocity. The results substantiate prior theoretical and empirical work which high- lights the educational significance of social pretend play in early childhoood. Social pretend play appears to provide a contextual framework within which mature social interaction can occur and social competencies may be acquired.     

Validation of continuous measures of peer social interaction with self- and teacher-reports of friendship and social engagement

ABSTRACT

The present study validates a new procedure that combines continuous measures of proximity (Ubisense) and vocalization (LENA) into measures of peer social interaction. The data were collected from 4 boys and 5 girls (ages 2–3 at the outset) on 8 separate days (3–4 hours per day) over the course of an academic year. Teacher reports of friendship were positively correlated with continuous measures of dyadic social interaction (i.e., the amount of time two children spent in proximity to one another, talking). Self-reports of reciprocated friendship were marginally correlated with continuous measures of dyadic social interaction, but only in the spring semester (when children were older and their reports of friendship more reliable). At the individual level, peer nominations of likeability, and teacher ratings of sociability and withdrawal were correlated with continuous measures of social interaction (i.e., the amount of time a child spent in proximity to other children, talking).     

Spillover of authenticity from work to home: The mediating role of affect

A growing area of research is beginning to examine the state-like nature of authenticity. The current study builds on this research by examining the (dis)continuity in state authenticity across two different social contexts: work and home. We surveyed 154 full-time employees twice a day for five consecutive workdays. Results showed that state authenticity at work and at home shared a relatively strong positive relationship that appeared to be mediated by the spillover of affect from one context to the next. This is consistent with prior work showing that affect tends to “spillover” from one context to the next and work that suggests a causal impact of affect on authenticity judgments. Implications for the study of state authenticity as well as work–home interaction are discussed.     

A preliminary investigation of reaction time variability in relation to social functioning in children evaluated for ADHD

Reaction time variability (RTV) is a ubiquitous phenomenon in Attention-Deficit/Hyperactivity Disorder (ADHD). Few studies have examined RTV in relation to functional outcomes such as social impairment in children with ADHD. In this exploratory study, we investigated whether RTV is associated with social functioning in children at risk for ADHD. Specifically, we explored the association between RTV (tau derived from correct go trials of a Stop-Signal task) and social functioning in 198 children ages 7–12 years referred for an ADHD evaluation. Social functioning measures included child and/or parent ratings of social competence, aggression, social problems, and impairment in relationships. In regression analyses that also included Oppositional Defiant Disorder symptoms and sex, higher RTV was significantly associated with lower ratings of social competence, and higher proactive/reactive aggression ratings on the child self-report measures. RTV was not significantly associated with parent report of social functioning or relationship impairment. This study provides preliminary evidence that RTV may be associated with social functioning in children at risk for ADHD. We propose that lapses of attention affecting cognitive control may also negatively impact social information processing thereby affecting social functioning. Replication is warranted and longitudinal studies are needed to investigate whether RTV predicts social dysfunction in ADHD.     

The driver vigilance telemetric control system (DVTCS): Investigating sensitivity to experimentally induced sleep loss and fatigue

Vigilance technologies are used in the Australian rail industry to address the risks associated with driver sleepiness and fatigue. The aim of this study was to investigate whether a new device, designed to detect lowered states of arousal using electrodermal activity (EDA), would be sensitive to experimentally induced sleepiness and fatigue. Fifteen individuals (7 of them female, 9 male; 18–32 years of age) spent 3 consecutive days in the laboratory, which included 1 night of sustained wakefulness (28 h). The participants completed a 10-min psychomotor vigilance task (PVT) and fatigue and sleepiness ratings every 2 h, and a 30-min driving simulator every 4 h. As was expected, simulated driving, PVT, and subjective ratings indicated increasing levels of sleepiness and fatigue during sustained wakefulness. The EDA device output did not coincide with these findings. The results indicated that the EDA indicator was not sensitive to increased sleepiness and fatigue at the levels produced in the present study.     

Gaze aversion during social interaction in preterm infants: a function of attention skills?

Preterm infants avert their gaze more often and for longer periods in early social interactions compared to full term infants. In previous studies this finding is interpreted as being a function of the higher degree of parental stimulation that is often found in parents of preterm children. The current study explores an additional hypothesis. Since the development of general visual attention abilities is found to be less optimal in preterm children, it is possible that less optimal maturation of attention abilities partially explains the elevated gaze aversion in a social context. Therefore, the current study investigated the association between gaze aversion in a social context and the ability to disengage and shift visual attention in a non-social context in 20 preterm and 42 full term infants aged 4 and 6 months. Results confirm that preterm infants are slower to shift their attention in a non-social context and that they avert their gaze more often in a social context compared to full term children. Furthermore, more frequent gaze aversion during social interaction at 6 months was related to longer disengagement and the shifting of attention at 4 and 6 months, but only within the preterm group. The results suggest that attention maturation is less optimal in preterm children; this can be observed in a non-social as well as a social context. Less attention maturation in preterm children can negatively influence the amount of time they can stay actively involved in social interaction.     

Negatively biased emotion perception in depression as a contributing factor to psychological aggression perpetration: a preliminary study

Based on research linking depressive symptoms and intimate partner aggression perpetration with negatively biased perception of social stimuli, the present authors examined biased perception of emotional expressions as a mechanism in the frequently observed relationship between depression and psychological aggression perpetration. In all, 30 university students made valence ratings (negative to positive) of emotional facial expressions and completed measures of depressive symptoms and psychological aggression perpetration. As expected, depressive symptoms were positively associated with psychological aggression perpetration in an individual's current relationship, and this relationship was mediated by ratings of negative emotional expressions. These findings suggest that negatively biased perception of emotional expressions within the context of elevated depressive symptoms may represent an early stage of information processing that leads to aggressive relationship behaviors.     

The relationship between self-consciousness and interpersonal effectiveness and a new scale to measure individual differences in self-consciousness

The purpose of this research was to explore the relationship between a dispositional tendency to become self-conscious and interpersonal effectiveness. It was hypothesized that excessive self-consciousness may be a significant component of social inadequacy and this prediction was confirmed in two experiments. In both studies, maladaptive self-consciousness was measured using a new scale and the development and validity for the test are reported. In the first study, the social skills of persons high or low in maladaptive self-consciousness were assessed using sociometric ratings made by acquaintances. Persons high in maladaptive self-consciousness were perceived by their peers as more socially inadequate. The second study was conducted in a controlled laboratory setting and involved placing persons high or low in maladaptive self-consciousness in a dyadic interaction with a randomly selected partner. Following this, both participants were asked to report their feelings and reactions during the interaction and to make behavioral ratings of their partner. Trained observers also made behavioral ratings of both interactants. It was hypothesized that maladaptive self-consciousness would be associated with ineffective social behavior, reduced sensitivity to one's partner, and a heightened self-perception of inadequacy. These predictions were confirmed and the implications of the relationship between maladaptive self-consciousness and social inadequacy are discussed.     

Perceived physical and social causality in animated motions: spontaneous reports and ratings

Michotte argued that we perceive cause-and-effect, without contributions from reasoning or learning, even in displays of two-dimensional moving shapes. Two studies extend this line of work from perception of mechanical to social causality. We compared verbal reports with structured ratings of causality to gain a better understanding of the extent to which perceptual causality occurs spontaneously or depends on instruction or context. A total of 120 adult observers (72 in the main experiment, 48 in an initial experiment) saw 12 (or 8) different computer animations of shape A moving up to B, which in turn moved away. Animations factorially varied the temporal and spatial relations of the shapes, and whether they moved rigidly or in a non-rigid, animal-like manner. Impressions of social as well as physical causality appeared in both free reports and ratings. Perception of physical causality was stronger than perception of social causality, particularly in free reports. No differences of this nature appear in infants and children, so the asymmetry may reflect learnt knowledge. Physical causality was relatively unspecific initially, but discrimination of causal and delayed control events improved with exposure to multiple events. Experience seems to affect the causal illusion even over a short timeframe; the idea of 'one-trial causality' may be somewhat misleading. Regardless of such effects on the absolute level of responses, the different measures showed similar patterns of variation with the spatio-temporal configuration and type of motion. The good fit of ratings and reports validates much recent work in this area.     

Marital satisfaction, recovery from work, and diurnal cortisol among men and women.

DESIGN: Multilevel modeling was used to model relationships between salivary cortisol, daily diary ratings of work experiences, and Marital Adjustment Test scores (Locke & Wallace, 1959), in a sample of 60 adults who sampled saliva 4 times per day over 3 days. RESULTS: Among women but not men, marital satisfaction was significantly associated with a stronger basal cortisol cycle, with higher morning values and a steeper decline across the day. For women but not men, marital satisfaction moderated the within-subjects association between afternoon and evening cortisol level, such that marital quality appeared to bolster women's physiological recovery from work. For both men and women, evening cortisol was lower than usual on higher-workload days, and marital satisfaction augmented this association among women. Men showed higher evening cortisol after more distressing social experiences at work, an association that was strongest among men with higher marital satisfaction. CONCLUSION: This work has implications for the study of physiological recovery from work, and also suggests a pathway by which marital satisfaction influences allostatic load and physical health.