Comparing eye-tracking metrics of mental workload caused by NDRTs in semi-autonomous driving

The objective of this study was to verify the effectiveness of eye-tacking metrics in indicating driver’s mental workload in semi-autonomous driving when the driver is engaged in different non-driving related tasks (NDRTs). A driving simulator was developed for three scenarios (high-, medium-, and low-mental workload presented by SAE (Society of Automotive Engineers) Levels 0, 1, and 2) and three uni-modality secondary tasks. Thirty-six individuals participated in the driving simulation experiment. NASA-TLX (Task Load Index), secondary task performance, and eye-tracking metrics were used as indicators of mental workload. The subjective rating using the NASA-TLX showed a main effect of autonomous level on mental workload in both visual and auditory tasks. Correlation-matrix calculation and principal-component extraction indicated that pupil diameter change, number of saccades, saccade duration, fixation duration, and 3D gaze entropy were effective indicators of a driver’s mental workload in the visual and auditory multi-tasking situations of semi-autonomous driving. The accuracy of predicting the mental-workload level using the K-Nearest Neighbor (KNN) classifier was 88.9% with bootstrapped data. These results can be used to develop an adaptive multi-modal interface that issues efficient and safe takeover requests.     

What drives tourists to adopt self-driving cars?

Autonomous vehicles are expected to shape mobility and tourism. This paper introduces an extension to the TAM to better understand the adoption of self-driving cars for tourism purposes. The new model (TAMAT) confirms some under-explored impacts of tourism-related variables, such as Openness to Tourism Usage and Unusual Surroundings, and the Adherence to Conventional Use on the Intention to Use self-driving cars. The research is based on online data collection (n = 646) and applies Covariance-Based Structural Equation Modelling. Findings indicate that the opportunity of using self-driving cars for tourism and unusual environments has a positive impact, while adherence to conventional car use has a negative impact on the intention to use self-driving cars.     

A single bout of resistance exercise can enhance episodic memory performance

Acute aerobic exercise can be beneficial to episodic memory. This benefit may occur because exercise produces a similar physiological response as physical stressors. When administered during consolidation, acute stress, both physical and psychological, consistently enhances episodic memory, particularly memory for emotional materials. Here we investigated whether a single bout of resistance exercise performed during consolidation can produce episodic memory benefits 48 h later. We used a one-leg knee extension/flexion task for the resistance exercise. To assess the physiological response to the exercise, we measured salivary alpha amylase (a biomarker of central norepinephrine), heart rate, and blood pressure. To test emotional episodic memory, we used a remember-know recognition memory paradigm with equal numbers of positive, negative, and neutral IAPS images as stimuli. The group that performed the exercise, the active group, had higher overall recognition accuracy than the group that did not exercise, the passive group. We found a robust effect of valence across groups, with better performance on emotional items as compared to neutral items and no difference between positive and negative items. This effect changed based on the physiological response to the exercise. Within the active group, participants with a high physiological response to the exercise were impaired for neutral items as compared to participants with a low physiological response to the exercise. Our results demonstrate that a single bout of resistance exercise performed during consolidation can enhance episodic memory and that the effect of valence on memory depends on the physiological response to the exercise.     

Prediction of symptoms of emotional distress by mood regulation expectancies and affective traits

Three studies examined negative mood regulation expectancies (NMRE) and affective traits as independent predictors of self‐reported symptoms of emotional distress. NMRE represent individuals' beliefs that they can alleviate unpleasant emotional states. Stronger NMRE are associated with more adaptive coping, more positive cognition during negative moods, more effective responses under stress and less emotional distress. Affective traits represent long‐term tendencies toward particular affective experiences; they confer risk for specific symptoms of emotional distress. In Study 1, NMRE, trait negative affect (TNA) and trait positive affect (TPA) were all independently associated with depression among students and staff of a German university. In Study 2, in prospective analyses among U.S. college students traits exhibited hypothesised relationships with anxiety and depressive symptoms, and NMRE uniquely predicted anhedonic depression. Study 3 revealed independent prediction of change in symptoms over time by NMRE among U.S. college students, whereas traits were not associated with change in distress, anxiety and depression symptoms. Results suggest independent roles for NMRE and traits in the development of depression and anxiety symptoms and highlight the importance of NMRE as a potential target of therapeutic intervention in the process of symptom change.     

Self-determined motivation,physical exercise and diet in obese children: A three-year follow-up study

The present study's objective was to track long term (three years intervention and six months “detraining”) the influence of an exercise program with or without diet on the motivation of sedentary obese children. The participants were 27 children (8-11 years), divided into two groups according to the program they followed. The G1 group followed a physical exercise program (three 90-minute sessions per week), and the G2 group this physical exercise program plus a low calorie diet. The participants’ motivation to engage in exercise was measured using the Behavioural Regulation in Exercise Questionnaire-2. Both groups showed improvements in amotivation in the 3rd year and in the detraining period (in the G1 and G2, respectively) and in intrinsic regulation of exercise behaviour (in the G1 and G2, respectively). There were also differences between the two groups in external regulation in the intervention and detraining periods. This appears to be indicative of the appropriateness of long-term physical exercise to generate greater autonomous motivation, and hence changes towards healthy living habits that are stable in time.     

To be or not to be at risk: Spontaneous reactions to risk information

Rheumatoid arthritis (RA) is a chronic disease, which can lead to considerable psychological distress. The present study evaluated anxiety and depression symptoms for this chronic and painful illness within the framework of the conservation of resources (COR) theory. Coping strategies, coping self-efficacy, religiousness and social support are very important personal resources, which have been found to protect individuals from psychological distress. The aim of the present study was to examine the predictive values of socio-demographic and illness-related variables, perceived social support, ways of coping, religiousness, arthritis self-efficacy and resource loss for psychological distress in a sample of 117 RA patients from Turkey, a secular, Islamic, non-western developing country. The results revealed that RA patients experience considerable anxiety and depressive symptoms. The results of the regression analysis showed that gender, helplessness coping and resource loss are significant predictors of anxiety, whereas arthritis self-efficacy and resource loss are significant predictors of depression. Resource loss appeared as an important predictor for both anxiety and depression. This finding was consistent with the COR theory. The clinical implications of these findings are discussed.     

Goal pursuit in young adulthood: The role of personality and motivation in goal appraisal trajectories across 6 years

The aim of this longitudinal study was to examine changes in the appraisals of personal goals during young adulthood, and to investigate personality and motivation as predictors of goal appraisals. Israeli young adults (N = 284, 46% female) were assessed four times during ages 23–29 and reported on their goal appraisals (goal investment, goal momentum and goal stress), personality (efficacy and self-criticism) and motivation (autonomous motivation, controlled motivation, amotivation). The results showed mean stability for goal investment and momentum, whereas goal stress declined. Efficacy predicted higher goal investment and momentum 6 years later, while self-criticism accounted for individual differences in goal stress. Autonomous motivation predicted higher goal investment and momentum, while amotivation related to higher goal stress.     

Teacher stress: An eight-year follow-up study on teachers' work,stress, and health

Abstract

The purpose of this study was to compare teacher stress between the years 1983 and 1991. Seventy teachers in comprehensive and upper secondary schools participated in the study. The teachers were studied first during the school year 1983–84 and again eight years later during the autumn term of 1991 by means of repeated questionnaires. During this 8-year period the general working situation among the teachers had remained quite stable: Most of them had remained at the same school teaching the same subjects at the same level. The results showed a drop in the teachers' well-being over the period. In particular, those over 55 years of age showed more emotional stress reactions in 1991 than eight years earlier. Furthermore, they evaluated their social relations with pupils as worse in 1991 compared to 1983. A half both of those with low emotional stress reactions and those high in them in 1983 were stilll in the same categories in 1991. Emotional stress reactions were reflected in simultaneous work ability and psychosomatic health data. Moreover, long-term stress was seen to lead to various psychosomatic complaints, but these were not reflected in self-rated health status. The results suggest that teacher stress is not necessarily a short-lived problem, and ways of preventing or reducing stress (e.g. continuing education, counseling, co-operation) should be employed.     

Parental Emotional Response to Children’s Traumas

To better understand how parents react to their child’s trauma exposure and evaluate whether different reactions are related to different types of traumas, 120 parents (79.2% mothers, 18.3% fathers, 2.5% other caregivers) were asked about their emotional reactions related to their child’s self-reported worst trauma. Emotional reactions were assessed with the Parental Emotional Reactions Questionnaire (PERQ). Parents reported high levels of distress and guilt. Furthermore, there was a significant relationship between type of trauma and parents’ overall emotional reactions. Parental distress was equally endorsed among the different trauma groups. Parents of children who experienced intrafamilial violence and extrafamilial sexual abuse reported the highest levels of guilt, and child exposure to intrafamilial violence was associated with higher levels of parental shame.