Genetic and environmental contributions to the associations between intraindividual variability in reaction time and cognitive function

Intraindividual variability (IIV) in reaction time has been related to cognitive decline, but questions remain about the nature of this relationship. Mean and range in movement and decision time for simple reaction time were available from 241 individuals aged 51–86 years at the fifth testing wave of the Swedish Adoption/Twin Study of Aging. Cognitive performance on four factors was also available: verbal, spatial, memory, and speed. Analyses indicated that range in reaction time could be used as an indicator of IIV. Heritability estimates were 35% for mean reaction and 20% for range in reaction. Multivariate analysis indicated that the genetic variance on the memory, speed, and spatial factors is shared with genetic variance for mean or range in reaction time. IIV shares significant genetic variance with fluid ability in late adulthood, over and above and genetic variance shared with mean reaction time.     

Relationship Between Discrete Emotions and Moral Content Judgment in Sport Settings

The purpose of the present study was to provide new knowledge on the relation between emotions and morality by investigating the relation between discrete emotions and moral content judgment in sports. The participants were 363 athletes (179 male, 184 female) who were involved in competitive sport at the time of data collection. Their age ranged from 18 to 23 years (M = 20.01, SD = 1.38). All participants were undergraduate sport-science students at a Greek university and were involved in several sports. The subjects filled in two questionnaires: Moral Content Judgment in Sport Questionnaire and Sport Emotion Questionnaire. The results supported a rather vague relationship between discrete emotions and moral content judgment.     

Multiplicity of Emotions in Moral Judgment and Motivation

Multiple moral emotions were examined from a dynamic motivational framework through two hypothetical dilemmas that originate from the cognitive-developmental research program in morality. A questionnaire based on recognition task measurement of moral motivation and emotions was administered to 546 college students. As part of the dynamic complexity of moral motivation, intrapersonal operation of multiple emotions were expected and found toward each emotion target in each judgment context. Compassion and distress were among the most important moral emotions. Relatively strong degrees of anger and hate were reported toward the victimizers in ways that distinguished judgment choices. Participants distinguished a variety of positive emotions from anger and hate through differential associations with judgment choices. The study revealed orderly patterns of variability in the multiplicity of moral emotional experience based on relations with specific emotion targets, judgment choices, and developmental quality of moral motivation. The overall developmental quality of moral motivation was negatively associated with hate and positively associated with anger toward the victimizers. Emotional awareness was also found to be positively related to the developmental quality of moral motivation. Exploring the intrapersonal multiplicity of moral emotional experience has important implications for understanding the complexity of moral decision making and motivation.     

The compulsion to confess and the compulsion to judge in the analytic situation

In this paper the author shows that human beings have two quasi‐instinctual primitive tendencies – namely, the compulsion to confess and the compulsion to judge (to condemn or to absolve). These compulsions are originally unconscious and become conscious during the course of the analytic process. The compulsion to judge is a natural consequence of the compulsion to confess. These two tendencies are intensified by the analytic situation. The patient has a compulsion to confess to the analyst and to himself, and likewise the analyst has a compulsion to confess to himself and to the patient. The patient therefore has a compulsion to judge himself as good or bad and to judge the analyst as good or bad while, on the other hand, the analyst has a compulsion to judge himself as good or bad and to judge the patient as good or bad. The task of analysis is to make both patient and analyst conscious of their compulsions to confess and to judge (to condemn or to absolve). The compulsion to judge in the analyst, particularly if unconscious, may give rise to mistakes in diagnosis, technique, treatment, and the assessment of analysability. The requirement of analytic neutrality in the analyst constantly conflicts with his compulsion to judge. If we are profoundly involved in our patient's dramatic conflict, we are bound to pass a judgement (condemnation or absolution); however, when we judge, we are not neutral and therefore become incapable of intellectual consciousness of the patient's conflict. Conversely, if we do not judge, we are neutral, but are then relatively uninvolved in the patient's conflict and are hence virtually unable to achieve emotional consciousness. The author attempts to show that neutrality cannot and must not be a preconstituted attitude in the analyst, but can and must be a point of arrival following a profound, intensely felt existential experience based on an attitude of non‐condemnation and non‐absolution.     

Test of the Ratio Judgment Hypothesis

The hypothesis that we are capable of judging ratios of subjective intensities is widely used in psychology. Here, experimental results are reported that more stringently verify prior findings that people respond to sensory intensity differences while they execute the task of judging sensory intensity ratios. This verification was made on brightness and heaviness and for verbal and matching responses, suggesting that the results may be general for both sensory intensive dimensions and response systems. The results have implications for the comparisons of scores on evaluation scales based on ratio judgment.     

The effect of external perturbations on variability in joint coupling and single joint variability

This paper explores the effect of goal-oriented external perturbations created by elastic tubes attached to the hip and ankles on lower limb joint variability and hip–knee and knee–ankle coordination variability during running. Kinematics of ten healthy male runners were analysed prior to and following a 7-week tube running intervention while running with and one without this constraint. The training intervention was based on variable training aspects to increase within-movement variability and adaptability of the running pattern. To analyse the effects of the tubes on the running pattern, the phase plot vector length deviation (i.e., the standard deviation of the phase plot vector length) for the within-joint variability and the continuous relative phase variability for the joint coupling variability were calculated. Results revealed acute increases of variability in both parameters. However, after the intervention, variability of the tube running situation returned to normal for all couplings and joints except the knee. No transfer effects to normal running were observed. This suggests very rapid adaptations to such perturbations. In the long-term, it may ask for more or different variations.     

Change in intraindividual variability over time as a key metric for defining performance-based cognitive fatigability

Cognitive fatigability is conventionally quantified as the increase over time in either mean reaction time (RT) or error rate from two or more time periods during sustained performance of a prolonged cognitive task. There is evidence indicating that these mean performance measures may not sufficiently reflect the response characteristics of cognitive fatigue. We hypothesized that changes in intraindividual variability over time would be a more sensitive and ecologically meaningful metric for investigations of fatigability of cognitive performance. To test the hypothesis fifteen young adults were recruited. Trait fatigue perceptions in various domains were assessed with the Multidimensional Fatigue Index (MFI). Behavioral data were then recorded during performance of a three-hour continuous cued Stroop task. Results showed that intraindividual variability, as quantified by the coefficient of variation of RT, increased linearly over the course of three hours and demonstrated a significantly greater effect size than mean RT or accuracy. Change in intraindividual RT variability over time was significantly correlated with relevant subscores of the MFI including reduced activity, reduced motivation and mental fatigue. While change in mean RT over time was also correlated with reduced motivation and mental fatigue, these correlations were significantly smaller than those associated with intraindividual RT variability. RT distribution analysis using an ex-Gaussian model further revealed that change in intraindividual variability over time reflects an increase in the exponential component of variance and may reflect attentional lapses or other breakdowns in cognitive control. These results suggest that intraindividual variability and its change over time provide important metrics for measuring cognitive fatigability and may prove useful for inferring the underlying neuronal mechanisms of both perceptions of fatigue and objective changes in performance.     

The Role of Numeracy and Intelligence in Health‐Risk Estimation and Medical Data Interpretation

Despite ample evidence that numeracy is an important influence on patient understanding and use of health‐related information, there is a dearth of studies examining the concept's relationship to other individual differences measures that may underlie complex judgments in the health domain. In this study, we compared the relative contributions of selected extant numeracy measures and general intelligence and other measures to varied judgment and decision‐making outcomes. Two hundred participants completed numeracy items, subscales of the Wechsler Adult Intelligence Scales, the need for cognition scale, and four relevant outcome measures including risk estimation and medical data interpretation. A numeracy scale constructed using item response and confirmatory factor analyses was consistently the strongest predictor across all outcome measures and accounted for unique variance over and above general intelligence. The results support the concept of numeracy as an independent construct that merits consideration in patient communication. Copyright © 2013 John Wiley & Sons, Ltd.     

Sleep variability and fatigue in adolescents: Associations with school‐related features

This study aims to evaluate the influences of sleep duration and sleep variability (SleepV), upon adolescents' school‐related situations. The Health Behaviour in School‐Aged Children (HBSC) survey is based on a self‐completed questionnaire. The participants were 3164 pupils (53.7% girls), attending the 8th and 10th grades, 14.9 years old, and were inquired about subjective sleep duration during the week and weekends, SleepV, fatigue, difficulties in sleep initiation, school achievement, feelings towards schools, pressure with school work and skipping classes. Multiple regression models used, as dependent variables: (a) school achievement, (b) disliking school, (c) pressure with school work and (d) skipping classes, using as independent variables, each of the remaining school‐related variables, fatigue, total sleep duration and difficulties in sleep initiation. The average sleep duration in the week and during weekdays was lower than recommended for these age groups, and almost half of students had high SleepV between weekdays and weekends. A logistic model revealed that the absence of SleepV was associated with lower perception of school work pressure, less frequent skipping classes, more infrequent fatigue and more infrequent difficulties in sleep initiation. Poor sleep quality, SleepV and insufficient sleep duration affected negatively school‐related variables.