Representational change and magnitude estimation: why young children can make more accurate salary comparisons than adults

Development of estimation has been ascribed to two sources: (1) a change from logarithmic to linear representations of number and (2) development of general mathematical skills. To test the representational change hypothesis, we gave children and adults a task in which an automatic, linear representation is less adaptive than the logarithmic representation: estimating the value of salaries given in fractional notation. The representational change hypothesis generated the surprising (and accurate) prediction that when estimating the magnitude of salaries given in fractional notation, young children would outperform adults, whereas when estimating the magnitude of the same salaries given in decimal notation, adults would outperform children.     

Bayes and blickets: effects of knowledge on causal induction in children and adults

People are adept at inferring novel causal relations, even from only a few observations. Prior knowledge about the probability of encountering causal relations of various types and the nature of the mechanisms relating causes and effects plays a crucial role in these inferences. We test a formal account of how this knowledge can be used and acquired, based on analyzing causal induction as Bayesian inference. Five studies explored the predictions of this account with adults and 4-year-olds, using tasks in which participants learned about the causal properties of a set of objects. The studies varied the two factors that our Bayesian approach predicted should be relevant to causal induction: the prior probability with which causal relations exist, and the assumption of a deterministic or a probabilistic relation between cause and effect. Adults' judgments (Experiments 1, 2, and 4) were in close correspondence with the quantitative predictions of the model, and children's judgments (Experiments 3 and 5) agreed qualitatively with this account.     

Utilizing probabilities as decision weights in closed and open information boards: A comparison of children and adults

Decisions in preschoolers (6 years), elementary schoolers (9.7 years), and adults (21 years) were studied with an information board crossing three probabilistic cues (validities: .83, .67, .50) with two options. Experiment 1 (n = 215) applied a standard version of the information board (closed presentation format), in which information must be searched sequentially and kept in mind for the decision. Experiment 2 (n = 217) applied an open format (Glöckner & Betsch, 2008), in which all information was visible during decision making. Elementary schoolers but not preschoolers benefited from an open format — indicated by an increase in using probabilities as decision weights. In the open but not closed format, choices were biased by normatively irrelevant information (the lure). Variations in the prediction patterns of the cues influenced decisions in all age groups. Effects for presentation format, pattern, and lure jointly indicate that even children are capable of considering multiple information in their decisions.     

The development and learning of the visual control of movement: An ecological perspective

We compare development and learning of the visual control of movement from an ecological perspective. It is argued that although the constraints that are imposed upon development and learning are vastly different, both are best characterised as a change towards the use of more useful and specifying optic variables. Implicit learning, in which awareness is drawn away from movement execution, is most appropriate to accomplish this change in optic variable use, although its contribution in development is more contentious. Alternatively, learning can also be affected by explicit processes. We propose that explicit learning would typically invoke vision for perception processes instead of the designated vision for action processes. It is for that reason that after explicit learning performance is more easily compromised in the face of pressure or disorders. We present a way to deal with the issue of explicit learning during infancy.     

Judgments of remembering: the revelation effect in children and adults

When items on a recognition test are presented as a series of increasingly complete fragments rather than being presented initially in their fully intact form, adults' judgments of recognition exhibit an increased tendency to judge items as "old," an illusion of recognition referred to as the revelation effect. The present study used pictorial stimuli to test for a revelation effect with 4-year-olds, 8-year-olds, and adults (N = 76). A reliable revelation effect was found at all ages tested, indicating that the complex fluency-of-processing discrepancy detection and attribution mechanisms thought to be responsible for the effect function similarly across an age range from 4-years-of-age through adulthood. It was also found that the recognition decisions of the 8-year-olds and the adults were affected by how quickly they were able to identify a picture during the revelation phase of the recognition test. This effect was not found with the 4-year-olds, suggesting an age difference in the awareness and strategic use of an implicit memory effect when making explicit judgments of recognition.     

Time course of selective attention in clinically depressed young adults: an eye tracking study

Depressed individuals display biased attention for emotional information when stimuli are presented for relatively “long” (e.g., 1 s) durations. The current study examined whether attentional biases are sustained over a much longer period. Specifically, clinically depressed and never depressed young adults simultaneously viewed images from four emotion categories (sad, threat, positive, neutral) for 30 s while line of visual gaze was assessed. Depressed individuals spent significantly more time viewing dysphoric images and less time viewing positive images than their never depressed counterparts. Time course analyses indicated that these biases were maintained over the course of the trial. Results suggest that depressed participants' attentional biases for dysphoric information are sustained for relatively long periods even when other emotional stimuli are present. Mood congruent information-processing biases appear to be a robust feature of depression and may have an important role in the maintenance of the disorder.     

Working memory in children: a time-constrained functioning similar to adults

Within the time-based resource-sharing (TBRS) model, we tested a new conception of the relationships between processing and storage in which the core mechanisms of working memory (WM) are time constrained. However, our previous studies were restricted to adults. The current study aimed at demonstrating that these mechanisms are present and functional before adulthood. For this purpose, we investigated the effect on maintenance of the duration of the attentional capture induced by processing. In two experiments using computer-paced WM span tasks, 10-year-olds were asked to maintain letters while performing spatial location judgments. The duration of this processing was manipulated by varying either the discriminability between target locations or the contrast between targets and background. In both experiments, longer processing times resulted in poorer recall, as we observed previously in adults. These findings suggest that the core mechanisms of WM described by the TBRS model are already settled during childhood.     

The effect of friendly touch on delay-of-gratification in preschool children

Physical touch has many documented benefits, but past research has paid little attention to the effects of touch on children's development. Here, we tested the effect of touch on children's compliance behaviour in a modified delay-of-gratification task. Forty children (M?=?59 months) were randomly assigned to a touch or no touch group. Children in the intervention condition received a friendly touch on the back while being told that they should wait for permission to eat a candy. Results showed that children in the touch condition waited an average of two minutes longer to eat the candy than children in the no touch condition. This finding has implications for the potential of using touch to promote positive behaviours in children.     

Integration of weight and distance information in young children: The role of relational complexity

Young children's integration of weight and distance information was examined using a new methodology that combines a single-armed apparatus with functional measurement. Weight and distance values were varied factorially across the item set. Children estimated how far the beam would tilt when different numbers of weights were placed at different distances from the pivot. There was a developmental progression from non-systematic responding (3-year-olds) to responding based on a single variable, usually weight (4-year-olds) to responding based on integration of weight and distance (5-, 6- and 7-year-olds). Individual analyses revealed additive and multiplicative integration rules in children aged from 5 years. Weight–distance strategy complexity increased with age and was associated with better performance on independent measures of relational processing, especially the more complex items. Thus weight–distance integration involves processing of complex relational information. The findings enhance the explanatory power of Relational Complexity theory as a domain-general approach to cognitive development.     

The development of conceptual interests in young children

We conducted a longitudinal analysis of the relative intensity and duration of interests associated with conceptual domains between the ages of 4 and 6 years, respectively. Results indicated a significant portion of preschool children do sustain an interest in conceptual domains during some portion of their childhood. Expected gender differences were found, with boys more likely to express an interest in a conceptual domain than girls. A latent growth curve analysis revealed that the probability of exhibiting a conceptual interest declined as school began, though the rate of that decline was similar for both boys and girls. Potential explanations for the decrease in conceptual interests as school begins are considered.     

The connection between cognitive development and specific fears and worries in normal children and children with below-average intellectual abilities: a preliminary study.

The present study explored the relationship between cognitive development and anxiety phenomena in 4-12-year-old children. Fears and worries of normal children (n=176) were compared to those of children with below-average intellectual abilities (children with BAIA; n=105). We evaluated to what extent level of cognitive development as indexed by a Piagetian conservation task was associated with the presence of fears and worries. While normal children and children with BAIA did not differ with regard to the content of their fears and worries, normal children more frequently reported such anxiety phenomena during the semi-structured Anxiety Interview than did children with BAIA. Furthermore, in normal children, evidence was found to suggest that level of cognitive development contributes to the experience of fears and worries. That is, anxiety phenomena were more prevalent among those children who passed a Piagetian conservation task. However, when anxiety phenomena were assessed by means of the Koala Fear Questionnaire (KFQ), a different picture emerged. KFQ data suggested that fears were less frequent in normal children and those children with BAIA who had a higher level of cognitive functioning. Apparently, the Anxiety Interview and the KFQ tap quite different aspects of anxiety. The KFQ seems to measure primitive fears that are likely to be prevalent among children with limited cognitive capacity, whereas the Anxiety Interview assesses more sophisticated anxiety phenomena that probably depend on high levels of cognitive functioning.     

Together we are strong: Explicit and implicit paranormal beliefs predict performance in a knowledge test of paranormal phenomena better than explicit beliefs alone

The belief in paranormal phenomena is a frequently studied topic. Studies predominantly assess explicit (i.e., conscious) parts of paranormal belief (PB) using questionnaire-based self-report measures which are prone to impression management and social desirability tendencies. In order to investigate the usefulness of measuring implicit (i.e., automatic) PB, we developed a PB Implicit Association Test (PB-IAT). Implicit PB was uncorrelated with explicit PB, but moderated the relationship between explicit PB and participants’ knowledge of paranormal phenomena. Participants with a weak implicit PB did not differ in their knowledge scores regardless of whether they had strong or weak explicit PB. But participants with strong implicit PB had higher scores when they also had strong explicit PB compared to participants with weak explicit PB. These results suggest that discrepant configurations of PB impair performance in a knowledge test about paranormal phenomena.     

Children's knowledge of the earth: a new methodological and statistical approach

In the field of children’s knowledge of the earth, much debate has concerned the question of whether children’s naive knowledge—that is, their knowledge before they acquire the standard scientific theory—is coherent (i.e., theory-like) or fragmented. We conducted two studies with large samples (N = 328 and N = 381) using a new paper-and-pencil test, denoted the EARTH (EArth Representation Test for cHildren), to discriminate between these two alternatives. We performed latent class analyses on the responses to the EARTH to test mental models associated with these alternatives. The naive mental models, as formulated by Vosniadou and Brewer, were not supported by the results. The results indicated that children’s knowledge of the earth becomes more consistent as children grow older. These findings support the view that children’s naive knowledge is fragmented.     

Acquiring an understanding of design: evidence from children's insight problem solving

The human ability to make tools and use them to solve problems may not be zoologically unique, but it is certainly extraordinary. Yet little is known about the conceptual machinery that makes humans so competent at making and using tools. Do adults and children have concepts specialized for understanding human-made artifacts? If so, are these concepts deployed in attempts to solve novel problems? Here we present new data, derived from problem-solving experiments, which support the following. (i) The structure of the child's concept of artifact function changes profoundly between ages 5 and 7. At age 5, the child's conceptual machinery defines the function of an artifact as any goal a user might have; by age 7, its function is defined by the artifact's typical or intended use. (ii) This conceptual shift has a striking effect on problem-solving performance, i.e. the child's concept of artifact function appears to be deployed in problem solving. (iii) This effect on problem solving is not caused by differences in the amount of knowledge that children have about the typical use of a particular tool; it is mediated by the structure of the child's artifact concept (which organizes and deploys the child's knowledge). In two studies, children between 5 and 7 years of age were matched for their knowledge of what a particular artifact "is for", and then given a problem that can only be solved if that tool is used for an atypical purpose. All children performed well in a baseline condition. But when they were primed by a demonstration of the artifact's typical function, 5-year-old children solved the problem much faster than 6-7-year-old children. Because all children knew what the tools were for, differences in knowledge alone cannot explain the results. We argue that the older children were slower to solve the problem when the typical function was primed because (i) their artifact concept plays a role in problem solving, and (ii) intended purpose is central to their concept of artifact function, but not to that of the younger children.     

Categorization by schema relations and perceptual similarity in 5-year-olds and adults: A study in vision and in audition

This research explores the way in which young children (5 years of age) and adults use perceptual and conceptual cues for categorizing objects processed by vision or by audition. Three experiments were carried out using forced-choice categorization tasks that allowed responses based on taxonomic relations (e.g., vehicles) or on schema category relations (e.g., vehicles that can be seen on the road). In Experiment 1 (visual modality), prominent responses based on conceptually close objects (e.g., objects included in a schema category) were observed. These responses were also favored when within-category objects were perceptually similar. In Experiment 2 (auditory modality), schema category responses depended on age and were influenced by both within- and between-category perceptual similarity relations. Experiment 3 examined whether these results could be explained in terms of sensory modality specializations or rather in terms of information processing constraints (sequential vs. simultaneous processing).     

Effects of saccadic bilateral eye movements on memory in children and adults: an exploratory study

The effects of saccadic bilateral (horizontal) eye movements on true and false memory in adults and children were investigated. Both adults and children encoded lists of associated words in the Deese-Roediger-McDermott paradigm followed by a test of recognition memory. Just prior to retrieval, participants were asked to engage in 30s of bilateral vs. vertical vs. no eye movements. For studied information, the results for adults replicated previous work; bilateral eye movements were demonstrated to increase the accuracy of memory by increasing the hit rate and reducing the false alarm rate for related and unrelated recognition test lures. The results for children also indicated an improvement in memory accuracy, and like adults, was due to both an increase in the hit rate and a reduction in the false alarm rate. In spite of these similarities, the effects of bilateral eye movements differed between adults and children for critical unstudied words; i.e., those associated with the theme of the list. Only in adults did, bilateral eye movements reduce associative false memories; children did not show a reduction in false memory for critical associates. This produced a dissociation between the effects of eye movements on associative false memory as a function of age. The results are discussed from a developmental perspective in terms of potential mechanisms underlying true and false memory.     

Shedding light on words and sentences: near-infrared spectroscopy in language research

Investigating the neuronal network underlying language processing may contribute to a better understanding of how the brain masters this complex cognitive function with surprising ease and how language is acquired at a fast pace in infancy. Modern neuroimaging methods permit to visualize the evolvement and the function of the language network. The present paper focuses on a specific methodology, functional near-infrared spectroscopy (fNIRS), providing an overview over studies on auditory language processing and acquisition. The methodology detects oxygenation changes elicited by functional activation of the cerebral cortex. The main advantages for research on auditory language processing and its development during infancy are an undemanding application, the lack of instrumental noise, and its potential to simultaneously register electrophysiological responses. Also it constitutes an innovative approach for studying developmental issues in infants and children. The review will focus on studies on word and sentence processing including research in infants and adults.     

On Nachträglichkeit: The modernity of an old concept1

Nachträglichkeit provides the memory, not the event, with traumatic signifi cance and signifi es a circular complementarity of both directions of time. Conceived by Freud as early as 1895 in the Project for a scientifi c psychology, the concept remains in his work without offi cial status but through its character of biphasic development and latency indispensable for understanding temporal connections and psychic causality. As an implicit principle it is linked with the postponement and biphasic onset of sexual life … and retains its sometimes hidden importance until the late Moses study. Temporarily virtually forgotten, it was recalled to memory by Lacan in 1953. Translations into French as après‐coup and into English as ‘deferred action’ emphasized the two vectors (retroactivity and after‐effect) separately which are united in the substantive form coined by Freud. Unnoticed, it played a part in many aspects of clinical practice, especially in Winnicott's Fear of breakdown and the subsequent (nachträglich) working through of unconscious infantile and transgenerational confl icts. The author uses a clinical illustration to elucidate the belated understanding of the striving for non‐existence in Winnicott's sense. Wolfgang Loch extended Freud's concept of Nachträglichkeit in a constructivist way, advocating an art of interpretation as an innovative enterprise through which connections are not only unmasked but also created, constituted by subsequent (nachträglich) reinterpretation of a subjective past. Very briefl y the author refers to the interdisciplinary reception of the concept of Nachträglichkeit, especially in cultural studies.     

Processing of perceptual information is more robust than processing of conceptual information in preschool-age children: evidence from costs of switching

Is processing of conceptual information as robust as processing of perceptual information early in development? Existing empirical evidence is insufficient to answer this question. To examine this issue, 3- to 5-year-old children were presented with a flexible categorization task, in which target items (e.g., an open red umbrella) shared category membership with one test item (e.g., a folded umbrella) and perceptual characteristics with another test item (e.g., a red mushroom). Participants were instructed to either categorize stimuli by the same dimension (i.e., perceptual similarity or category membership) in both phases of the task, or switch from categorizing by one dimension to categorizing by the other dimension. Results pointed to a strong asymmetry in switch costs: conceptual switch costs were higher than perceptual switch costs. These results suggest that processing of perceptual information remains more robust than processing of conceptual information at least until 5 years of age.