Towards a Vygotskyan cognitive robotics: The role of language as a cognitive tool

Cognitive Robotics can be defined as the study of cognitive phenomena by their modeling in physical artifacts such as robots. This is a very lively and fascinating field which has already given fundamental contributions to our understanding of natural cognition. Nonetheless, robotics has to date addressed mainly very basic, low-level cognitive phenomena like sensory-motor coordination, perception, and navigation, and it is not clear how the current approach might scale up to explain high-level human cognition. In this paper we argue that a promising way to do that is to merge current ideas and methods of ‘embodied cognition’ with the Russian tradition of theoretical psychology which views language not only as a communication system but also as a cognitive tool, that is by developing a Vygotskyan cognitive robotics. We substantiate this idea by discussing several domains in which language can improve basic cognitive abilities and permit the development of high-level cognition: learning, categorization, abstraction, memory, voluntary control, and mental life.     

Pointing gestures modulate domestic dogs’ search behavior for hidden objects in a spatial rotation problem

In the spatial domain, domestic dogs are highly inclined to search at the last location where they saw an object disappear and cannot infer that a hidden object has moved imperceptibly from one location to another. In the current study, we examined whether exposure to human social cues modulates dogs’ search behavior for hidden objects. In Experiment 1, twenty dogs were first trained to find an object they saw disappear inside a stationary container in the presence (social group) or absence (non-social group) of pointing gestures. In tests, the containers were rotated 180° around a central axis. The dogs in the non-social group systematically searched at the initial (now incorrect) hiding location, whereas the dogs in the social group chose correctly significantly above chance. In Experiment 2, we tested whether pre-exposure to human pointing has an impact on dogs’ use of gestures. No gestures were given during training and both the social and non-social conditions were administered to each of the ten dogs. In contrast to Experiment 1, the performance of dogs in the social condition dropped significantly and varied substantially from one dog to another. Overall, this study suggests that dogs’ tendency to use human signals is so strong that it even outweighs their spatial bias to search where they saw an object disappear; however, this penchant to use human gestures appears to be dependent on the degree of familiarity of the dog with these signals.     

Individual differences in children's private speech: Consistency across tasks, timepoints, and contexts

Children often talk themselves through their activities. They produce private speech (PS), which is internalized to form inner speech (silent verbal thought). Twenty-five 8-10-year-olds completed four tasks in a laboratory context (Tower of London, digit span, and two measures of spatial IQ). PS production was recorded. Eleven months later, the same participants completed the Tower of London and academic numeracy tasks, again in a laboratory context, as well as numeracy tasks in a classroom context. Rates of PS production and its level of internalization showed large positive correlations across time, tasks, and contexts. The results are interpreted in terms of the psychometric properties of PS production and are taken as evidence for the development of a domain-general system for verbal self-regulation in childhood.     

The varieties of inner speech: links between quality of inner speech and psychopathological variables in a sample of young adults

A resurgence of interest in inner speech as a core feature of human experience has not yet coincided with methodological progress in the empirical study of the phenomenon. The present article reports the development and psychometric validation of a novel instrument, the Varieties of Inner Speech Questionnaire (VISQ), designed to assess the phenomenological properties of inner speech along dimensions of dialogicality, condensed/expanded quality, evaluative/motivational nature, and the extent to which inner speech incorporates other people’s voices. In response to findings that some forms of psychopathology may relate to inner speech, anxiety, depression, and proneness to auditory and visual hallucinations were also assessed. Anxiety, but not depression, was found to be uniquely positively related to both evaluative/motivational inner speech and the presence of other voices in inner speech. Only dialogic inner speech predicted auditory hallucination-proneness, with no inner speech variables predicting levels of visual hallucinations/disturbances. Directions for future research are discussed.     

Movement adaptations in 7- to 10-year-old typically developing children: evidence for a transition in feedback-based motor control

We used a modified double-step pointing task to study movement adaptations in 7- to 10-year-old typically developing children. We found that the majority (63%) were able to optimally adapt fast, goal-directed visually-guided movements to a late change in target location meeting the requirements of speed and accuracy. A minority (35%) failed to meet the requirement of accuracy resulting in a less optimal adaptation. The results showed that the ability to adapt movements optimally develops before the age of 7 years in typically developing children. Literature proposes a transition in development of motor control around the age of 8 years. The present results replicate and extend this by suggesting that this transition affects the later phases of fast, goal-directed visually-guided movements rather than the early phases, such as movement programming and acceleration. Finally, the results indicate that the optimally adapted movements were the result of a specific strategy in which a specific component of movement execution was slowed on all trials. This suggests that 7- to 10-year-old typically developing children have developed implicit knowledge about which movement components are the most efficient to adapt.     

Bringing out the agreeableness in everyone: Using a cognitive self-regulation model to reduce aggression

Research has shown that those individuals high in agreeableness recruit helpful thoughts in hostile contexts, presumably in the service of controlling aggressive behavior. The present experiment follows from such work, but importantly does so in a manner seeking to support causal conclusions. Participants were randomly assigned to an experimental training condition, in which hostile prime words were followed by helpful target words, or to a control condition that did not involve such pairings. Those assigned to the experimental condition subsequently exhibited lower levels of aggression in a laboratory task. Additional considerations and findings support the potential involvement of self-regulation processes. In general terms, the experiment reveals that a brief cognitive manipulation targeting processes thought to underlie aggression control was in fact causally effective in reducing subsequent levels of aggressive behavior.     

The development of landmark and beacon use in young children: evidence from a touchscreen search task

Children ages 2, 3 and 4 years participated in a novel hide-and-seek search task presented on a touchscreen monitor. On beacon trials, the target hiding place could be located using a beacon cue, but on landmark trials, searching required the use of a nearby landmark cue. In Experiment 1, 2-year-olds performed less accurately than older children on landmark trials but performed equivalently on beacon trials. In Experiment 2, the number of items on the screen was reduced and 2-year-olds' performance improved. Use of the landmark transformation technique in Experiment 3 revealed that older children formed a more precise landmark-target spatial relationship than 2-year-olds. Experiment 4 showed that the transformation itself was not responsible for the youngest participants' decreased accuracy in Experiment 3. Overall, beacons were utilized effectively by all participants, but the use of landmark cues is refined between the ages of 2 and 4.     

A projective assessment of autonomous motivation in children: Correlational and experimental evidence

This article presents two studies aimed at validating a new TAT-like projective measure of autonomous motivation in children. Study 1 assesses the validity of the new measure by correlating it with self-report questionnaires of autonomous motivation, positive and negative affect, task value and mastery goal orientation. Study 2 is an experiment in which autonomous motivation is manipulated and then assessed with the new projective measure and with a self-report scale. Results of both studies support the validity of the new projective measure. In study 2, regression analysis suggests that the new projective measure is sensitive to aspects of experimentally induced autonomous motivation that are not captured by a self-report measure.

Primal splitting as a basis for emotional and cognitive development in children

This article discusses the importance of good primal splitting as the basis for the child's emotional and cognitive development. A theoretical introduction analyses the possible pathologies of primal splitting, as they were first pointed out by Melanie Klein and then by some post-Kleinian authors, in particular Donald Meltzer. This is followed by some excerpts from the clinical material of the first year of the psychoanalytic psychotherapy of a three-year-old child suffering from eating problems. Starting from the child's play activity, the author tries to identify the splitting problems that underlie the child's view of the world, and to address these with him. The article shows how at times it can be useful to speak also to the child's intelligence, combining the usual analytic work (containment of anxiety and analysis of transference) with the analysis of the child's distortions and cognitive misconceptions. The article also suggests that faulty primal splitting tends to be transmitted from one generation to the next.     

Behavior problems in young children from low‐income families: The development of a new screening tool

The purpose of this study was to construct a screening tool, the Early Childhood Behavior Screen (ECBS), to identify behavior problems and prosocial behaviors in very young children (1–5 years old) from low‐income backgrounds. Field testing of the initial screening tool was conducted with a representative, diverse sample of 439 parents from a low‐income, urban community. The final 20‐item scale was written at a 3.9 grade reading level. Psychometric properties of the ECBS revealed that the items loaded on two factors, the Challenging Behavior factor and the Prosocial Behavior factor. Each factor demonstrated high levels of internal consistency (.87 and .92, respectively). The Challenging Behavior factor demonstrated adequate levels of concurrent validity (r = .75), sensitivity (r = .82), and specificity (r = .80) based on its relationship with the Eyberg Child Behavior Inventory (S.M. Eyberg & D. Pincus, 1999). The Prosocial Behavior factor is a clinically useful aspect of the ECBS, as it allows researchers and practitioners to identify the child's positive behaviors as part of a strength‐based approach to treatment. The results suggested that the ECBS has potential as a brief screening tool that is useful in pediatric, psychological, and educational settings that serve low‐income populations to aid in the identification of young children with challenging behaviors that may require intervention services     

Age-related differences in familiarity and recollection: ERP evidence from a recognition memory study in children and young adults

Using event-related potentials (ERPs), we examined the relative contributions of familiarity and recollection to recognition memory for items and their study contexts in school-aged children and adults. Whereas adults were able to selectively accept target items and to reject familiar nontarget items in an exclusion task, this discrimination was more difficult for children, as was evident in the high false alarm rates to nontargets even when item memory was controlled for. The analysis of the adults’ ERPs revealed more flexible and task-appropriate retrieval mechanisms, as was evident in the correlates of familiarity, recollection, and nontarget retrieval, as well as in postretrieval evaluation. In contrast, children’s ERPs revealed a parietal old/new effect for targets taken as a putative correlate of recollection. These findings suggest that children rely predominantly on recollection during recognition judgments, even in the absence of efficient memory control processes. The latter processes enable adults to monitor and verify the retrieved information and to control nontarget retrieval in the service of adequate source memory performance.     

Reversal learning in young children as a function of number of choice-alternatives

Discrimination learning and reversal problems were given to 128 children aged two and three years in which there were either two, three, six, or nine choice-alternatives per problem. The position of the correct object (either a toy car on the original problem and a ball on the reversal problem or vice versa) was varied randomly among all the possible positions, all other positions being occupied by duplicates of the incorrect object. It was found that two-choice reversal problems were much more difficult than all others. There was also a direct and monotonic relationship between ease of solution and number of choices present during reversal learning. Additional analysis inlicated that position response biases were probably responsible for this effect.     

Incidental learning in preschool children as a function of level of cognitive analysis

Preschool children's recall and clustering of organized lists of pictures were examined under deliberate instructions to remember or in incidental learning situations. The incidental tasks either required comprehension (categorization, or a rating of pleasantness-unpleasantness) or were formal orienting tasks involving processing in terms of physical features.Explicit instruction to remember and formal incidental instructions did not differ, and both lead to poorer performance than the comprehension activities. Categorization, whether accompanied by explicit instructions to recall, or occurring in the context of a meaningful activity, was no more efficient than categorization in and for itself. With children as with adults, it is the activity of the children which determines depth of processing and subsequent retention, not the intent to remember per se.     

Measuring cognitive factors in speech comprehension: The value of using the Text Reception Threshold test as a visual equivalent of the SRT test

The ability to comprehend speech in noise is influenced by bottom-up auditory and top-down cognitive capacities. Separate examination of these capacities is relevant for various purposes. Speech-Reception-Threshold (SRT) tests measure an individual's ability to comprehend speech. This paper addresses the value of the Text-Reception-Threshold (TRT) test (a visual parallel of the SRT test) to assess the cognitive capacities allocated during speech comprehension. We conducted a secondary data analysis, including 87 normally-hearing adults (aged 18 to 78 years). Correlation coefficients between age, TRT, working memory (Spatial Span) and SRT were examined. The TRT and SRT correlated significantly ( r  =   0.30), supporting the value of TRT in explaining inter-individual differences in SRTs. The relations between age and TRT and between SSP and TRT were non-significant. The results indicate that the current TRT test does not fully cover the cognitive aspects relevant in speech comprehension. Adaptation of the test is required before clinical implementation can be considered.     

Arithmetic fact mastery in young children: a longitudinal investigation

Children with poor arithmetic fact mastery (n=45) at the end of third grade were compared to grade-level peers with good arithmetic fact mastery (n=60) in competencies related to reading and mathematics. Children were assessed longitudinally across second and third grades. When predictor variables such as IQ were held constant, the poor fact mastery and good fact mastery groups performed at about the same level and progressed at a comparable rate on math story problems and on broad reading achievement. The groups also progressed at a comparable rate on broad math achievement, although children with poor fact mastery performed at a significantly lower level. Children with poor fact mastery showed remarkably little growth on timed number facts during the study period, despite normal growth in other areas of mathematics. Deficits in fact mastery are highly persistent and appear to be independent of reading and language abilities.     

The functional‐cognitive framework as a tool for accelerating progress in cognitive neuroscience: On the benefits of bridging rather than reducing levels of analyses

The subject matter of neuroscience research is complex, and synthesising the wealth of data from this research to better understand mental processes is challenging. A useful strategy, therefore, may be to distinguish explicitly between the causal effects of the environment on behaviour (i.e. functional analyses) and the mental processes that mediate these effects (i.e. cognitive analyses). In this article, we describe how the functional‐cognitive (F‐C) framework can accelerate cognitive neuroscience and also advance a functional treatment of brain activity. We first highlight that cognitive neuroscience can particularly benefit from the F‐C approach by providing an alternative to the problematic practice of reducing cognitive constructs to behavioural and/or neural proxies. Next, we outline how functional (behaviour–environment) relations can serve as a bridge between cognitive and neural processes by restoring mental constructs to their original role as heuristic tools. Finally, we give some examples of how both cognitive neuroscience and traditional functional approaches can mutually benefit from the F‐C framework.     

Executive function in young children and chimpanzees (Pan troglodytes): evidence from a nonverbal dimensional change card sort task

In this article the authors compared chimpanzees' executive function with that of children. They developed a nonverbal dimensional change card sorting task, which indexed the development of executive function. Three pairs of mother and offspring chimpanzees and 30 typically developed 5-year-old children were presented with 2 target stimuli and a test stimulus comprising 2 dimensions (size and shape) on a display; they were required to sort the test stimulus according to 1 dimension (e.g., shape). After 5 consecutive correct trials, the participants had to sort the test stimulus according to the other dimension (e.g., size). The results showed that the chimpanzees often failed to sort the test stimuli according to the first and reversed dimensions. On the other hand, the children were correctly able to use both dimensions. These results indicate that chimpanzees may have less developed executive skills than children.     

Risk preferences in young children: early evidence of individual differences in reaction to potential gains and losses

New methods were developed for studying risky decision making in children as young as age five. Each child was given a block of ‘gain’ trials, for example, a choice between a sure gain of one prize and a 50:50 chance of gaining either two prizes or no prize, and a block of ‘loss’ trials, for example, a choice between a sure loss of one prize and a 50:50 chance of losing either two prizes or no prize. We were thus able to compare risky choice for gains and losses at the level of the individual child. In each of two experiments a variety of individual difference variables were measured, including in Experiment 2, the child's parent's scores on the same task. Across experiments, the preponderance of choices was of the risky option. However, most children and adults made more risky choices in the domain of losses than in the domain of gains. Predictors of individual differences in children included shyness, impulsivity, and the risk taking of the child's parent. We suggest that methods are now in place to encourage further studies of decision processes in young children. Copyright © 2003 John Wiley & Sons, Ltd.     

Natural conversations as a source of false memories in children: Implications for the testimony of young witnesses

Research on factors that can affect the accuracy of children’s autobiographical remembering has important implications for understanding the abilities of young witnesses to provide legal testimony. In this article, we review our own recent research on one factor that has much potential to induce errors in children’s event recall, namely natural memory sharing conversations with peers and parents. Our studies provide compelling evidence that not only can the content of conversations about the past intrude into later memory but that such exchanges can prompt the generation of entirely false narratives that are more detailed than true accounts of experienced events. Further, our work show that deeper and more creative participation in memory sharing dialogues can boost the damaging effects of conversationally conveyed misinformation. Implications of this collection of findings for children’s testimony are discussed.     

Infant carrying as a tool to promote secure attachments in young mothers: Comparing intervention and control infants during the still-face paradigm

Infants of adolescent mothers have a greater risk of developing insecure attachment types and attachment disorders into adulthood. Previous research suggests that skin-to-skin contact predicts secure attachment; however, it is largely unknown whether infant carrying or “babywearing” has similar benefits. We hypothesized that adolescent mothers (Mage=19.1 years, SD = 2.0; 40.6 % Hispanic; 40 %< = 11th grade) who were randomly assigned to an infant carrying condition at 2–4 weeks’ post-partum (n = 16; 1 h daily for 3 months), compared to a control group (n = 17; reading), would be more likely to have securely attached infants at 7 months (M = 29.0 weeks, SD = 3.4). We coded infant gaze orientation, fretfulness, affect, self-soothing behaviors, and vocalizations in the reunion phase of the Still-Face Paradigm, and used an algorithm derived from the infant Global Rating Scales to determine attachment type. Infants in the intervention condition were more likely to have secure attachments and less likely to have disorganized attachments compared to the control condition. Hours spent babywearing was positively correlated with secure attachment, r_pb = .40, and negatively correlated with disorganized attachment, r_pb =−0.36. There were no statistically significant differences between the conditions or babywearing hours for avoidant or resistant attachment types. The results suggest that infant carrying may be an effective tool at promoting secure attachments, particularly for mothers and infants at greater risk for attachment insecurity.