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Institute
- Department Psychologie (108) (remove)
Action effects have been stated to be important for infants’ processing of goal-directed actions. In this study, 11-month-olds showed equally fast predictive gaze shifts to a claw’s action goal when the grasping action was presented either with three agency cues (self-propelled movement, equifinality of goal achievement and a salient action effect) or with only a salient action effect, but infants showed tracking gaze when the claw showed only self-propelled movement and equifinality of goal achievement. The results suggest that action effects, compared to purely kinematic cues, seem to be especially important for infants' online processing of goal-directed actions.
We uniquely introduce convex production costs into a cartel model involving spatial price discrimination. We demonstrate that greater convexity improves cartel stability and that for sufficient convexity first best locations will be adopted. We show that allowing locations to vary over the game reduces cartel stability but that greater convexity continues to improve that stability. Moreover, when the degree of convexity does not support the first best collusive locations, other collusive locations exist that require less stability and these may either increase or decrease social welfare relative to competition. Critically, these locations that require less stability are more dispersed in sharp contrast to the known result assuming linear production costs.
An area of increasing interest amongst teachers and researchers is the availability of tools for the design and implementation of literacy interventions with Spanish speaking children. The present systematic literature review contributes to this need by summarizing available findings on evidence-based literacy interventions (EBI) for children from first to third year of primary school. Our results are based on 20 EBI that aimed at improving at least one of the critical components mentioned by the NRP (2000): phonological awareness, phonics, fluency, vocabulary and comprehension. As 90% of the studies were completed with English-speaking children, we critically discussed the applicability of this evidence to the specific context of Spanish-speaking countries. Although many of the general characteristics of the EBI completed with English speaking children could also guide interventions in Spanish, it remains crucial to take into account structural differences between the orthographies of both languages. Moreover, we identified transversal strategies and implementation techniques that due to their universal character could also be useful for early literacy interventions in Spanish. (c) 2018 Fundacion Universitaria Konrad Lorenz. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/).
In the number-to-position methodology, a number is presented on each trial and the observer places it on a straight line in a position that corresponds to its felt subjective magnitude. In the novel modification introduced in this study, the two-numbers-to-two-positions method, a pair of numbers rather than a single number is presented on each trial and the observer places them in appropriate positions on the same line. Responses in this method indicate not only the subjective magnitude of each single number but, simultaneously, provide a direct estimation of their subjective numerical distance. The results of four experiments provide strong evidence for a linear representation of numbers and, commensurately, for the linear representation of numerical distances. We attribute earlier results that indicate a logarithmic representation to the ordered nature of numbers and to the task used and not to a truly non-linear underlying representation.
Is bad intent negligible?
(2018)
The hostile attribution bias (HAB) is a well-established risk factor for aggression. It is considered part of the suspicious mindset that may cause highly victim-justice sensitive individuals to behave uncooperatively. Thus, links of victim justice sensitivity (JS) with negative behavior, such as aggression, may be better explained by HAB. The present study tested this hypothesis in N=279 German adolescents who rated their JS, HAB, and physical, relational, verbal, reactive, and proactive aggression. Victim JS predicted physical, relational, verbal, reactive, and proactive aggression when HAB was controlled. HAB only predicted physical and proactive aggression. There were no moderator effects. Injustice seems an important reason for aggression irrespective of whether or not it is intentionally caused, particularly among those high in victim JS. Thus, victim JS should be considered as a potential important risk factor for aggression and receive more attention by research on aggression and preventive efforts.
Personality is a relevant predictor for important life outcomes across the entire lifespan. Although previous studies have suggested the comparability of the measurement of the Big Five personality traits across adulthood, the generalizability to childhood is largely unknown. The present study investigated the structure of the Big Five personality traits assessed with the Big Five Inventory-SOEP Version (BFI-S; SOEP = Socio-Economic Panel) across a broad age range spanning 11-84 years. We used two samples of N = 1,090 children (52% female, M-age = 11.87) and N = 18,789 adults (53% female, M-age = 51.09), estimating a multigroup CFA analysis across four age groups (late childhood: 11-14 years; early adulthood: 17-30 years; middle adulthood: 31-60 years; late adulthood: 61-84 years). Our results indicated the comparability of the personality trait metric in terms of general factor structure, loading patterns, and the majority of intercepts across all age groups. Therefore, the findings suggest both a reliable assessment of the Big Five personality traits with the BFI-S even in late childhood and a vastly comparable metric across age groups.
Purpose: Dealing with a child who suffers from functional abdominal pain (FAP) is a major challenge for the child's parents. However, little is known about the quality of life (QoL) of this group of parents. Therefore, this cross-sectional study aimed to provide a comprehensive analysis of parental QoL among parents seeking treatment for their child's abdominal pain.
Methods: 133 parents of 7-13-year-old children diagnosed with FAP reported on their health-related QoL (HRQoL), as assessed by the SF-12, and on caregiver-related QoL, as assessed by two CHQ-PF50 scales (emotional impact, time impact). T tests were used to compare the parents' scores on these measures with reference scores. Subgroups which were at risk of impairment were defined by cut-off scores. Determinants of parental QoL were identified by hierarchical regression analyses.
Results: While the parents showed significantly poorer mental health compared to population-based reference samples (d = 0.33-0.58), their physical health did not differ. However, parents were severely strained with respect to the time impact and emotional impact of their child's health (d = 0.33-1.58). While 12.7-27.9% of the parents were at risk of poor HRQoL, 60.6-70.1% were highly strained due to the demands of their role as caregivers. Physical and mental health were best explained by parents' psychiatric symptoms, while parents' perception of their child's impairment additionally determined the high time and emotional impact.
Conclusions: Physical HRQoL is not impaired in the majority of parents seeking treatment for their child's functional abdominal pain. However, the time demands and worries due to the child's pain deserve specific attention. Psychosocial interventions for a child's FAP should include information provided to the parents about coping with time constraints and emotional impact. Further prospective studies are warranted.
(1) Background: Sexual violence (SV) is a major public health problem, with negative socio-economic, physical, mental, sexual, and reproductive health consequences. Migrants, applicants for international protection, and refugees (MARs) are vulnerable to SV. Since many European countries are seeing high migratory pressure, the development of prevention strategies and care paths focusing on victimised MARs is highly needed. To this end, this study reviews evidence on the prevalence of SV among MAR groups in Europe and the challenges encountered in research on this topic. (2) Methods: A critical interpretive synthesis of 25 peer-reviewed academic studies and 22 relevant grey literature documents was conducted based on a socio-ecological model. (3) Results: Evidence shows that SV is highly frequent in MARs in Europe, yet comparison with other groups is still difficult. Methodologically and ethically sound representative studies comparing between populations are still lacking. Challenges in researching SV in MARs are located at the intrapersonal, interpersonal, community, societal, and policy levels. (4) Conclusions: Future research should start with a clear definition of the concerned population and acts of SV to generate comparable data. Participatory qualitative research approaches could be applied to better grasp the complexity of interplaying determinants of SV in MARs.
(1) Background: Sexual violence (SV) is a major public health problem, with negative socio-economic, physical, mental, sexual, and reproductive health consequences. Migrants, applicants for international protection, and refugees (MARs) are vulnerable to SV. Since many European countries are seeing high migratory pressure, the development of prevention strategies and care paths focusing on victimised MARs is highly needed. To this end, this study reviews evidence on the prevalence of SV among MAR groups in Europe and the challenges encountered in research on this topic. (2) Methods: A critical interpretive synthesis of 25 peer-reviewed academic studies and 22 relevant grey literature documents was conducted based on a socio-ecological model. (3) Results: Evidence shows that SV is highly frequent in MARs in Europe, yet comparison with other groups is still difficult. Methodologically and ethically sound representative studies comparing between populations are still lacking. Challenges in researching SV in MARs are located at the intrapersonal, interpersonal, community, societal, and policy levels. (4) Conclusions: Future research should start with a clear definition of the concerned population and acts of SV to generate comparable data. Participatory qualitative research approaches could be applied to better grasp the complexity of interplaying determinants of SV in MARs.
In the present study, we investigated the beneficial effects of trait self-compassion (SC) on perceived stress, shame, and the use of coping strategies in reaction to a socio-evaluative stressor while controlling for the effects of neuroticism (N) and conscientiousness (C). Participants (N = 105) performed a mental-arithmetic task with immediate in-person feedback. SC predicted less perceived stress and shame immediately after the stressor. Additionally, SC predicted less shame after a short recovery phase. This effect was fully mediated by less use of denial. Furthermore, SC buffered the effect of N on the use of denial, and C on shame after recovery. SC also predicted more use of positive reframing. Thus, SC may make a socio-evaluative stressor less threatening and may thwart a shame-inducing conception of the stressor by promoting clearer processing. Furthermore, SC may be especially beneficial for those vulnerable to dysfunctional coping and negative self-conscious emotions. This study contributes to the understanding of how trait self-compassion beneficially influences the processing of stressful situations.
Do properties of individual languages shape the mechanisms by which they are processed? By virtue of their non-concatenative morphological structure, the recognition of complex words in Semitic languages has been argued to rely strongly on morphological information and on decomposition into root and pattern constituents. Here, we report results from a masked priming experiment in Hebrew in which we contrasted verb forms belonging to two morphological classes, Paal and Piel, which display similar properties, but crucially differ on whether they are extended to novel verbs. Verbs from the open-class Piel elicited familiar root priming effects, but verbs from the closed-class Paal did not. Our findings indicate that, similarly to other (e.g., Indo-European) languages, down-to-the-root decomposition in Hebrew does not apply to stems of non-productive verbal classes. We conclude that the Semitic word processor is less unique than previously thought: Although it operates on morphological units that are combined in a non-linear way, it engages the same universal mechanisms of storage and computation as those seen in other languages.
Narcissus oeconomicus:
(2018)
How do narcissists respond to monetary rewards and are there differences in fairness sensitivity between different facets of narcissism? The present study (N = 287) investigated these questions using the Ultimatum Game, a behavioral decision-making task involving the presentation of advantageous and disadvantageous financial offers. The results of multilevel modeling revealed that individual differences in narcissism modulated responders’ game decisions: Individuals high in narcissism, particularly narcissistic rivalry, were more likely to accept monetary offers and this effect was even more pronounced for comparatively unfair offers. Results extend previous findings, suggesting that narcissists are hypersensitive to rewards and pay close attention how to maximize their personal profit rather than to enforce fairness norms.
A wolf in sheep’s clothing?
(2018)
Communal narcissists possess the unique belief in their capability to bring about freedom to the world, and so see themselves as “saints”. To examine if this communal self-view extends to the more automatic component of self-evaluation, that is, a person’s implicit self-view, the present study (N = 701) tested the extent to which communal narcissism was associated with explicit communal self-ratings and implicit associations between the self and communal attributes. The latent correlation between communal narcissism and explicit communal self-views was strongly positive, yet no such relationship emerged for implicit communal self-views. These findings support the notion that communal narcissism may represent an effort to gain favorable appraisals from others in the absence of a genuine communal self-view.
Agentic to the core?
(2018)
Researchers are still divided over whether narcissists possess positive or negative implicit self-views. Seemingly resolving this issue, Campbell et al. (2007) have demonstrated that narcissism is in fact related to higher implicit self-esteem as long as the implicit measure reflects agency. The present study used a large (N = 730) sample, carefully controlled stimuli, improved statistical analyses, and examined narcissism at the facet-level, but results did not replicate those of Campbell et al. In fact, the latent correlation between narcissism and implicit agency was close to zero, whereas the positive correlation between narcissism and explicit agency was replicated. We conclude that narcissists’ implicit self-views may be more neutral than positive or may depend on other contextual factors.
Even simple mental arithmetic is fraught with cognitive biases. For example, adding repeated numbers (so-called tie problems, e.g., 2 + 2) not only has a speed and accuracy advantage over adding different numbers (e.g., 1 + 3) but may also lead to under-representation of the result relative to a standard value (Charras et al., 2012, 2014). Does the tie advantage merely reflect easier encoding or retrieval compared to non-ties, or also a distorted result representation? To answer this question, 47 healthy adults performed two tasks, both of which indicated under-representation of tie results: In a result-to-position pointing task (Experiment 1) we measured the spatial mapping of numbers and found a left-bias for tie compared to non-tie problems. In a result-to-line-length production task (Experiment 2) we measured the underlying magnitude representation directly and obtained shorter lines for tie-compared to non-tie problems. These observations suggest that the processing benefit of tie problems comes at the cost of representational reduction of result meaning. This conclusion is discussed in the context of a recent model of arithmetic heuristics and biases.
Response conflicts play a prominent role in the flexible adaptation of behavior as they represent context-signals that indicate the necessity for the recruitment of cognitive control. Previous studies have highlighted the functional roles of the affectively aversive and arousing quality of the conflict signal in triggering the adaptation process. To further test this potential link with arousal, participants performed a response conflict task in two separate sessions with either transcutaneous vagus nerve stimulation (tVNS), which is assumed to activate the locus coeruleus-noradrenaline (LC-NE) system, or with neutral sham stimulation. In both sessions the N2 and P3 event-related potentials (ERP) were assessed. In line with previous findings, conflict interference, the N2 and P3 amplitude were reduced after conflict. Most importantly, this adaptation to conflict was enhanced under tVNS compared to sham stimulation for conflict interference and the N2 amplitude. No effect of tVNS on the P3 component was found. These findings suggest that tVNS increases behavioral and electrophysiological markers of adaptation to conflict. Results are discussed in the context of the potentially underlying LC-NE and other neuromodulatory (e.g., GABA) systems. The present findings add important pieces to the understanding of the neurophysiological mechanisms of conflict-triggered adjustment of cognitive control.
Background: Pavlovian processes are thought to play an important role in the development, maintenance and relapse of alcohol dependence, possibly by influencing and usurping on- going thought and behavior. The influence of Pavlovian stimuli on on-going behavior is paradigmatically measured by Pavlovian-to-instrumental-transfer (PIT) tasks. These involve multiple stages and are complex. Whether increased PIT is involved in human alcohol
dependence is uncertain. We therefore aimed to establish and validate a modified PIT paradigm that would be robust, consistent, and tolerated by healthy controls as well as by patients suffering from alcohol dependence, and to explore whether alcohol dependence is associated with enhanced Pavlovian-Instrumental transfer.
Methods: 32 recently detoxified alcohol-dependent patients and 32 age and gender matched healthy controls performed a PIT task with instrumental go/no-go approach behaviours. The task involved both Pavlovian stimuli associated with monetary rewards and losses, and images of drinks.
Results: Both patients and healthy controls showed a robust and temporally stable PIT effect. Strengths of PIT effects to drug-related and monetary conditioned stimuli were highly correlated. Patients more frequently showed a PIT effect and the effect was stronger in response to aversively conditioned CSs (conditioned suppression), but there was no group difference in response to appetitive CSs.
Conclusion: The implementation of PIT has favorably robust properties in chronic alcohol- dependent patients and in healthy controls. It shows internal consistency between monetary and drug-related cues. The findings support an association of alcohol dependence with an increased propensity towards PIT.
We compare the robustness of humans and current convolutional deep neural networks (DNNs) on object recognition under twelve different types of image degradations. First, using three well known DNNs (ResNet-152, VGG-19, GoogLeNet) we find the human visual system to be more robust to nearly all of the tested image manipulations, and we observe progressively diverging classification error-patterns between humans and DNNs when the signal gets weaker. Secondly, we show that DNNs trained directly on distorted images consistently surpass human performance on the exact distortion types they were trained on, yet they display extremely poor generalisation abilities when tested on other distortion types. For example, training on salt-and-pepper noise does not imply robustness on uniform white noise and vice versa. Thus, changes in the noise distribution between training and testing constitutes a crucial challenge to deep learning vision systems that can be systematically addressed in a lifelong machine learning approach. Our new dataset consisting of 83K carefully measured human psychophysical trials provide a useful reference for lifelong robustness against image degradations set by the human visual system.
Editorial: Reaching to Grasp Cognition: Analyzing Motor Behavior to Investigate Social Interactions
(2018)
Background: Prenatal maternal stress might be a risk for the developing fetus and may have long-lasting effects on child and adult vulnerability to somatic and psychiatric disease. Over-exposure of the unborn to excess glucocorticoids and subsequent alteration of fetal development is hypothesized to be one of the key mechanisms linking prenatal stress with negative child outcome. Methods: In this prospective longitudinal study, mothers-to-be (n = 405) in late pregnancy (36.8 +/- 1.9 weeks of gestational age) and their singleton neonates were studied. We investigated the impact of different prenatal stress indices derived from six stress variables (perceived stress, specific prenatal worries, negative life events, symptoms of depression, trait anxiety, neuroticism) and diurnal maternal saliva cortisol secretion on gestational age and anthropometric measures at birth.