Imitation Recognition Research Articles

Trajectoires développementales des différentes formes d’imitation et de leurs relations avec le développement cognitif et communicatif chez des enfants présentant un TSA

ObjectiveThe idea of a global imitation deficit in autism has existed for many years. Actually, a growing body of research is nuancing this idea by showing that even children with the most severe autistic profiles are able to imitate under certain conditions. However, we do not yet have longitudinal data on the developmental trajectories of different forms of imitation in children with ASD. So, the aim of the present study is: 1) to investigate the developmental trajectories of spontaneous imitation, elicited imitation, and imitation recognition in children with ASD; 2) to identify intra-individual factors associated with measured imitative performance; and 3) to examine the relationships between each of the three forms of imitation assessed and cognitive and communicative development. MethodsFourteen children with ASD aged between 3 years 8 months and 9 years 4 months were included in this study. A longitudinal experimental design involving three measurement times over a 16-month period was implemented. Nadel's imitation scale was used to assess spontaneous imitation, elicited imitation and imitation recognition. The Psycho-Educational Profile and the Snijders-Oonen non-verbal intelligence test were administered to assess cognitive and communicative development. ResultsChildren made significant progress over time on each of the three components of imitation, although we noted a heterogeneity of the developmental trajectories. The greatest gains were in elicited imitation. Motor skills, cognitive level and intensity of autistic behaviors at the beginning of the study significantly correlated with children's later imitative skills. Chronological age, however, was not. Cognitive and communicative development correlated more strongly with spontaneous imitation and imitation recognition than with elicited imitation. ConclusionRegardless of their age, children with ASD can progress in different forms of imitation. This underlines the value of regularly evaluating their skills in this area, in particular to offer them an individualized training program. On this point, our results illustrate the need not to train exclusively elicited imitation, but also to support communication through imitation.

Imitation Recognition by Minimally Verbal Young Children: A Comparison Between Down Syndrome and Autism Spectrum Disorder

Research has shown that children with autism spectrum disorder (ASD) display limited imitation recognition behaviors in comparison with typically developing children. However, the levels of imitation recognition of minimally verbal children with ASD relative to those with developmental disabilities are unknown. The purpose of this study was to compare the imitation recognition behaviors of 20 minimally verbal children with ASD and 20 minimally verbal children with Down syndrome (DS) when imitated by an adult in a play context. Results showed that children with ASD display more limited imitation recognition than children with DS. These results indicate that children with ASD are weaker in displaying imitation recognition. However, both groups displayed an association between imitation recognition and a variety of play actions in both groups.

Imitation recognition and its prosocial effects in 6-month old infants.

The experience of being imitated is theorised to be a driving force of infant social cognition, yet evidence on the emergence of imitation recognition and the effects of imitation in early infancy is disproportionately scarce. To address this lack of empirical evidence, in a within-subjects study we compared the responses of 6-month old infants when exposed to ipsilateral imitation as opposed to non-imitative contingent responding. To examine mediating mechanisms of imitation recognition, infants were also exposed to contralateral imitation and bodily imitation with suppressed emotional mimicry. We found that testing behaviours-the hallmark of high-level imitation recognition-occurred at significantly higher rates in each of the imitation conditions compared to the contingent responding condition. Moreover, when being imitated, infants showed higher levels of attention, smiling and approach behaviours compared to the contingent responding condition. The suppression of emotional mimicry moderated these results, leading to a decrease in all social responsiveness measures. The results show that imitation engenders prosocial effects in 6-month old infants and that infants at this age reliably show evidence of implicit and high-level imitation recognition. In turn, the latter can be indicative of infants' sensitivity to others' intentions directed toward them.

Spontaneous cross-species imitation in interactions between chimpanzees and zoo visitors

Imitation is a cornerstone of human development, serving both a cognitive function (e.g. in the acquisition and transmission of skills and knowledge) and a social–communicative function, whereby the imitation of familiar actions serves to maintain social interaction and promote prosociality. In nonhuman primates, this latter function is poorly understood, or even claimed to be absent. In this observational study, we documented interactions between chimpanzees and zoo visitors and found that the two species imitated each other at a similar rate, corresponding to almost 10% of all produced actions. Imitation appeared to accomplish a social–communicative function, as cross-species interactions that contained imitative actions lasted significantly longer than interactions without imitation. In both species, physical proximity promoted cross-species imitation. Overall, imitative precision was higher among visitors than among chimpanzees, but this difference vanished in proximity contexts, i.e. in the indoor environment. Four of five chimpanzees produced imitations; three of them exhibited comparable imitation rates, despite large individual differences in level of cross-species interactivity. We also found that chimpanzees evidenced imitation recognition, yet only when visitors imitated their actions (as opposed to postures). Imitation recognition was expressed by returned imitation in 36% of the cases, and all four imitating chimpanzees engaged in so-called imitative games. Previously regarded as unique to early human socialization, such games serve to maintain social engagement. The results presented here indicate that nonhuman apes exhibit spontaneous imitation that can accomplish a communicative function. The study raises a number of novel questions for imitation research and highlights the imitation of familiar behaviours as a relevant—yet thus far understudied—research topic.

The association between imitation recognition and socio-communicative competencies in chimpanzees (Pan troglodytes).

Imitation recognition provides a viable platform from which advanced social cognitive skills may develop. Despite evidence that non-human primates are capable of imitation recognition, how this ability is related to social cognitive skills is unknown. In this study, we compared imitation recognition performance, as indicated by the production of testing behaviors, with performance on a series of tasks that assess social and physical cognition in 49 chimpanzees. In the initial analyses, we found that males were more responsive than females to being imitated and engaged in significantly greater behavior repetitions and testing sequences. We also found that subjects who consistently recognized being imitated performed better on social but not physical cognitive tasks, as measured by the Primate Cognitive Test Battery. These findings suggest that the neural constructs underlying imitation recognition are likely associated with or among those underlying more general socio-communicative abilities in chimpanzees. Implications regarding how imitation recognition may facilitate other social cognitive processes, such as mirror self-recognition, are discussed.

An Evaluation of Imitation Recognition Abilities in Typically Developing Children and Young Children with Autism Spectrum Disorder.

Previous work has indicated that both typically developing children and children with Autism Spectrum Disorder (ASD) display a range of imitation recognition behaviors in response to a contingent adult imitator. However, it is unknown how the two groups perform comparatively on this construct. In this study, imitation recognition behaviors for children with ASD and typically developing children were observed during periods of contingent imitation imbedded in a naturalistic imitation task. Results from this study indicate that children with ASD are impaired in their ability to recognize being imitated relative to typically developing peers as demonstrated both by behaviors representing basic social attention and more mature imitation recognition. Display of imitation recognition behaviors was independent of length of contingent imitation period in typically developing children, but rate of engagement in imitation recognition behaviors was positively correlated with length of contingent imitation period in children with ASD. Exploratory findings also suggest a link between the ability to demonstrate recognition of being imitated and ASD symptom severity, language, and object imitation for young children with ASD.

Imitation recognition and tis effect on subsequent interactions between pet dogs (Canis familiaris)

Imitation recognition and tis effect on subsequent interactions between pet dogs (Canis familiaris)

An Exploration of Imitation Recognition in Young Children With Autism Spectrum Disorders

The ability to recognize when one is being imitated has been hypothesized to be an important developmental process related to the emergence of more advanced social-cognitive skills. While a series of behaviors indicating progressively more mature imitation recognition (IR) skills has been assessed in typically developing children, empirical work with children with autism spectrum disorders (ASDs) has largely focused on basic social responses to an imitative adult (e.g. increases in eye contact). Limited work has explored more mature IR behaviors in this population. This study compared the degree to which children with ASD engage in different behaviors thought to be indicative of IR during a naturalistic imitation task and the relationship between different types of IR behaviors and social-cognitive skills (i.e. imitation, language, social reciprocity, and joint attention). Thirty children with ASD were administered standardized measures of cognitive level, language, joint attention, social reciprocity, and imitation. IR behaviors were observed during periods of contingent imitation by an adult. Participants engaged more frequently in less mature (e.g. looking at the experimenter's toy or face) than more mature IR behaviors (e.g. testing the experimenter's intent to imitate). After controlling for developmental level, social reciprocity, object imitation, and gesture imitation were positively correlated with more mature IR. These findings suggest that the development of more mature IR skills is related to the development of other social-cognitive skills in children with ASD and provide additional empirical support for reports of more mature IR observed in this population. , Inc.

From visuo-motor interactions to imitation learning: Behavioural and brain imaging studies

We review three areas of research and theory relating to the involvement of motor processing in action observation: behavioural studies on imitation learning, behavioural work on short-term visuomotor interactions, and related neurophysiological and neuroimaging work. A large number of behavioural studies now indicate bi-directional links between perception and action: visual processing can automatically induce related motor processes, and motor actions can direct future visual processing. The related concept of direct matching (Rizzolatti et al., 2001) does not, however, imply that observed actions are transduced into a corresponding motor representation that would guarantee an instant and accurate imitation. Rather, studies on the mirror neuron system indicate that action observation engages the observer's own motor prototype of the observed action. This allows for enhanced action recognition, imitation recognition, and, predominantly in humans, imitation and observational learning. Despite the clear impact of action observation on motor representations, recent neuroimaging work also indicates the overlap of imitation learning with processes of non-imitative skill acquisition.

Macaques (Macaca nemestrina) recognize when they are being imitated

This study investigated whether monkeys recognize when a human experimenter imitates their actions towards an object. Two experimenters faced 10 pigtailed macaques, who were given access to an interesting object. One experimenter imitated the monkeys' object-directed actions, the other performed temporally contingent but structurally different object-directed actions. Results show a significant visual preference for the imitator during manual object manipulations, but not mouthing actions. We argue that the ability to match actions could be based on both visual-visual and kinaesthetic-visual matching skills, and that mirror neurons, which have both visual and motor properties, could serve as a neural basis for recognizing imitation. However, imitation recognition as assessed by visual preference does not necessarily imply the capacity to attribute imitative intentionality to the imitator. The monkeys might implicitly recognize when they are being imitated without deeper insight into the mental processes of others.

Imitation recognition in a captive chimpanzee (Pan troglodytes).

This study investigated the ability of a captive chimpanzee (Pan troglodytes) to recognise when he is being imitated. In the experimental condition of test 1a, an experimenter imitated the postures and behaviours of the chimpanzee as they were being displayed. In three control conditions the same experimenter exhibited (1) actions that were contingent on, but different from, the actions of the chimpanzee, (2) actions that were not contingent on, and different from, the actions of the chimpanzee, or (3) no action at all. The chimpanzee showed more "testing" sequences (i.e., systematically varying his actions while oriented to the imitating experimenter) and more repetitive behaviour when he was being imitated, than when he was not. This finding was replicated 4 months later in test 1b. When the experimenter repeated the same actions she displayed in the experimental condition of test 1a back to the chimpanzee in test 2, these actions now did not elicit those same testing sequences or repetitive behaviours. However, a live imitation condition did. Together these results provide the first evidence of imitation recognition in a nonhuman animal.

Le développement de l’intelligence sociale. Les précurseurs de l’intelligence sociale

Precursors of social intelligence. To-date, theoretical frameworks such as those which postulate that a Theory of Mind works as a modular component of human social behaviour generate increasing focus on early social perception and more specifically on early premices of attribution of intentionality. Experimental paradigms which simulate non-contingent communication have recently shown the early expectancies for social contingency of familiar partners. Expecting contingency may be considered as a first milestone in the development of a capacity to attribute intentionality to others. We will show that two main stages may be distinguished in the understanding of persons as intentional. As early as 2 months of age, infants detect mother’s non-contingent behaviour and show concern about it, which demonstrates that they have already formed expectancies for contingent communication and that they understand contingency as an intentional parameter of communication. After 6 months, infants generalise their expectancies for social contingency to strangers : thus, human beings start being considered – even if implicitely -as ontologically intentional. Synchronic imitation and imitation recognition are other possible precursors of the understanding of intentionality, in as much as they allow nonverbal infants to alternate between expression of intentionality (“ I intend you to do like me”) and the attribution of intentionality (“ I understand that you intend me to be like you”). Finally, joint attention and “ eye reading” represent another class of prerequisites likely to provide a pathway between seeing and knowing, and between observable indices of mental states and inferences of mental states. The late access to an explicit understanding of intentionality pleads in favour of the importance of mindreading in the building of an ultimate explanation of the most complex aspects of human behaviour.

What can we learn from the absence of evidence?

Heyes discounts findings of imitation and self recognition in nonhuman primates based on flimsy speculation and then indicates that even positive findings would not provide evidence of theory of mind. Her proposed experiment is unlikely to work, however, because, even if the animals have a theory of mind, a number of assumptions, not directly related to theory of mind, must be made about their reasoning ability.