Tracking of nociceptive thresholds using adaptive psychophysical methods

Psychophysical thresholds reflect the state of the underlying nociceptive mechanisms. For example, noxious events can activate endogenous analgesic mechanisms that increase the nociceptive threshold. Therefore, tracking thresholds over time facilitates the investigation of the dynamics of these underlying mechanisms. Threshold tracking techniques should use efficient methods for stimulus selection and threshold estimation. This study compares, in simulation and in human psychophysical experiments, the performance of different combinations of adaptive stimulus selection procedures and threshold estimation methods. Monte Carlo simulations were first performed to compare the bias and precision of threshold estimates produced by three different stimulus selection procedures (simple staircase, random staircase, and minimum entropy procedure) and two estimation methods (logistic regression and Bayesian estimation). Logistic regression and Bayesian estimations resulted in similar precision only when the prior probability distributions (PDs) were chosen appropriately. The minimum entropy and simple staircase procedures achieved the highest precision, while the random staircase procedure was the least sensitive to different procedure-specific settings. Next, the simple staircase and random staircase procedures, in combination with logistic regression, were compared in a human subject study (n = 30). Electrocutaneous stimulation was used to track the nociceptive perception threshold before, during, and after a cold pressor task, which served as the conditioning stimulus. With both procedures, habituation was detected, as well as changes induced by the conditioning stimulus. However, the random staircase procedure achieved a higher precision. We recommend using the random staircase over the simple staircase procedure, in combination with logistic regression, for nonstationary threshold tracking experiments.     

A Propositional Model of Implicit Evaluation

Implicit evaluation can be defined as the automatic effect of stimuli on evaluative responses. A major advantage of this definition is that it is neutral with regard to the mental processes and representations that mediate implicit evaluation. Whereas many existing models postulate that implicit evaluation is mediated by the automatic spreading of activation along associations in memory, it is also possible to entertain the idea that implicit evaluation is due to the automatic formation or activation of propositions. In line with such a propositional model of implicit evaluation, evidence suggests that implicit evaluation (a) can be based on instructions and inferences, (b) is sensitive to information about how stimuli are related and (c) can reflect several propositions that differ only with regard to how stimuli are related. Although it might be difficult to differentiate between propositional models on the one hand and association–activation or dual process models on the other hand, merely considering the idea that implicit evaluation might be mediated by propositions offers a new perspective on existing findings and leads to novel predictions about the conditions under which implicit evaluation occurs.     

Pleasure,Arousal, Dominance: Mehrabian and Russell revisited

This paper presents a discursive review of the dimensions pleasure, arousal and dominance that Mehrabian and Russell developed in 1974 to assess environmental perception, experience, and psychological responses. Since then numerous researchers applied these dimensions to assess the experience of the physical environment and its perceived qualities. Although the dimensions appeared to be useful, there is a long-lasting debate going on among environmental psychologists about the interpretation of pleasure, arousal and dominance and its underlying mechanisms. Due to the lack of clarity researchers use different adjectives to describe environmental experiences, which makes any comparison between research findings difficult. This paper shows that the three dimensions can be linked to the current ABC Model of Attitudes: pleasure, arousal and dominance can be respectively related to affective, cognitive and conative responses, i.e. Affect, Cognition and Behaviour (ABC). In addition, connecting the three dimensions to the triad feeling, thinking and acting, can also help to improve our understanding, interpretation and measurement of pleasure, arousal and dominance. Based on this review, it is proposed to re-introduce the three dimensions and to replace the nowadays often used two dimensional model with pleasure and arousal by a three dimensional model, including dominance as a third dimension, to represent the complete range of human responses.     

Predicting performance and performance satisfaction: mindfulness and beliefs about the ability to deal with social barriers in sport

This research investigates the role of beliefs about the ability to deal with specific social barriers and its relationships to mindfulness, football performance, and satisfaction with one's own and team performance. Study 1 aimed at eliciting these social barriers. Study 2 tested (i) whether self-efficacy referring to social barriers would predict performance over and above task-related self-efficacy and collective efficacy and (ii) the mediating role of self-efficacy to overcome social barriers in the relationship between mindfulness and performance. Participants were football (soccer) players aged 16–21 years (Study 1: N = 30; Study 2: N = 101, longitudinal sample: n = 88). Study 1 resulted in eliciting 82 social barriers referring to team, peer leadership, and coaches. Study 2 showed that task-related self-efficacy and collective efficacy explained performance satisfaction at seven-month follow-up, whereas self-efficacy referring to social barriers explained shooting performance at seven-month follow-up. Indirect associations between mindfulness and performance were found with three types of self-efficacy referring to social barriers, operating as parallel mediators. Results provide evidence for the role of beliefs about the ability to cope with social barriers and show a complex interplay between different types of self-efficacy and collective efficacy in predicting team sport performance.     

A Genetic Counseling Intervention to Facilitate Family Communication About Inherited Conditions

This paper describes the development and implementation of the first intervention to facilitate family communication of genetic information based on a genetic counseling model of practice. The intervention is telephone-based and therefore designed to complement face-to-face genetic counseling consultations. It was developed by firstly reviewing the literature and a model of genetic counseling practice, leading to definition of seven core principles underpinning the intervention. A counseling framework based on these principles was developed through iterative role playing and review, tested for consistency with good practice and piloted on ten study participants. It was found to be feasible to implement and consistent with good genetic counseling practice. Implementation included training of the genetic counselors who would deliver the intervention as part of a randomized controlled trial. Noteworthy deviations from good genetic counseling practice were observed, with unexpected additional insights into the ‘black box’ of genetic counseling that may have wider implications and would benefit from further investigation. The intervention is currently being evaluated in a randomized controlled trial, to assess its impact on the number of family members attending genetic services.     

Children of Mentally Ill Parents Participating in Preventive Support Groups: Parental Diagnoses and Child Risk

In the Netherlands, preventive support groups are offered to children of mentally ill parents. Given the variety of parental diagnoses it might be questionable if offering a standardized program for all these children is the most effective response. While no overall knowledge exists about the type of parental disorder and varying risk levels and support needs among the participating children, we examined whether there are differences between these children that are related to their parents’ diagnoses. With questionnaires we assessed risk factors in 122 mentally ill parents and their children: high parental illness severity, low perceived parental competence, parent–child interaction problems, poor family functioning, difficult child temperament, and low child competence. We also assessed the children’s psychosocial problems and negative cognitions about their parent’s illness. Results showed that most parents had co-morbidity (multiple diagnoses) and/or personality disorders. Children of parents with either of these conditions were more likely to be exposed to the risk factors: high parental illness severity, low perceived parental competence, problematic parent–child interaction, and low perceived child competence, compared to children of parents without these conditions. They were also faced with more risk factors and had more psychosocial problems and negative cognitions. From these results we may conclude that children of parents with co-morbidity and/or personality disorders require more extensive support than children of parents without these conditions. We suggest strengthening the children’s competence and involving parents as important focuses of preventive interventions for children at high risk. Longitudinal studies should test these assumptions.     

Controlling the stream of thought: Working memory capacity predicts adjustment of mind-wandering to situational demands

Although engaging in task-unrelated thoughts can be enjoyable and functional under certain circumstances, allowing one’s mind to wander off-task will come at a cost to performance in many situations. Given that task-unrelated thoughts need to be blocked out when the current task requires full attention, it has been argued that cognitive control is necessary to prevent mind-wandering from becoming maladaptive. Extending this idea, we exposed participants to tasks of different demands and assessed mind-wandering via thought probes. Employing a latent-change model, we found mind-wandering to be adjusted to current task demands. As hypothesized, the degree of adjustment was predicted by working memory capacity, indicating that participants with higher working memory capacity were more flexible in their coordination of on- and off-task thoughts. Notably, the better the adjustment, the smaller performance decrements due to increased task demands were. On the basis of these findings, we argue that cognitive control does not simply allow blocking out task-unrelated thoughts but, rather, allows one to flexibly adjust mind-wandering to situational demands.     

An Exploration of Parents’ Experiences and Empowerment in the Care for Preterm Born Children

Because of improved survival rates and medical prospects, the emphasis in care for preterm infants has shifted in recent years to a focus on support for the wellbeing of children and their families. For the healthcare professionals the parents of these children are the main partners for improving the care of their children. In this context, referring to “patient empowerment” implies not only the infant but also the parents, in other words “parent empowerment”. We aimed to explore parents’ experiences with hospital and aftercare for their preterm children, and the implications for parent empowerment, by organizing face-to-face (n = 4 and n = 7) and online (n = 14) focus group interviews with parents of preterm children. These focus group interviews showed that these parents indicated a lack of support and recognition of parental worries in the care for their infant during two important periods: (1) the transfer to another hospital and (2) after discharge home. These group interviews showed that parents greatly value initiatives that support and empower them in their role as parents and that strengthens their involvement in the care for their children. Requirements for enhancing parent empowerment are proposed.     

Reduced attentional capture in action video game players

Recent studies indicate that playing action video games improves performance on a number of attention-based tasks. However, it remains unclear whether action video game experience primarily affects endogenous or exogenous forms of spatial orienting. To examine this issue, action video game players and non-action video game players performed an attentional capture task. The results show that action video game players responded quicker than non-action video game players, both when a target appeared in isolation and when a salient, task-irrelevant distractor was present in the display. Action video game players additionally showed a smaller capture effect than did non-action video game players. When coupled with the findings of previous studies, the collective evidence indicates that extensive experience with action video games may enhance players’ top-down attentional control, which, in turn, can modulate the negative effects of bottom-up attentional capture.     

Abrupt onsets capture attention independent of top-down control settings II: Additivity is no evidence for filtering

Is attentional capture contingent on top-down control settings or involuntarily driven by salient stimuli? Supporting the stimulus-driven attentional capture view, Schreij, Owens, and Theeuwes (2008) found that an onset distractor caused a response delay, in spite of participants’ having adopted an attentional set for a color feature. However, Folk, Remington, and Wu (2009) claimed that this delay reflects separate, nonspatial filtering costs instead, because the onset effects were additive with color-based capture effects, and capture should have caused underadditivity. The present Experiment 1 shows that contingent capture caused by additional color cues is also additive, just like the onset effect. This makes additivity a dubious diagnostic with regard to spatial capture. Experiment 2 demonstrates that it is possible to obtain underadditivity when attention-demanding distractors have sufficient capturing power. Experiment 3 shows that the abrupt onset interference turns into a benefit when the locations of the onset and the target coincide. Together, these results argue in favor of stimulus-driven attentional capture by abrupt onsets.