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Results for “Imitative Behavior”

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PubMed1975

Acquisition of simple motor imitative behavior in mentally retarded and nonretarded children.

The effects of social reinforcement and population on two simple motor tasks which were embedded within a contingently reinforced imitation task were explored. A Social Reinforcement Type x Population interaction was observed, where the nonretarded children performed at higher levels under informative social reinforcement (right-correct) and at lower levels under affective social reinforcement (good-fine); the opposite was observed for the retarded children. In addition, one motor response was imitated to a higher degree than the other response.

Adolescent↗
PubMed1977

Being imitated by an adult and the subsequent imitative behavior of retarded children.

Institutionalized retarded subjects (N=57) were assigned to one of three experimental conditions during a simple three-choice task in which the subjects and the experimenter took turns feeding colored plastic "Cookie Monster." In the imitation condition, the experimenter imitated the subject's choice, and in the ninimtation condition, the experimenter avoided imitating the subject. Following imitation or nonimitation, the subject was given opportunities to imitate the experimenter. In the modeling only condition, the subject's choice always followed the experimenter's so that the subject always had the opportunity to imitate. Analysis of variance revealed a significant difference among the three conditions (p less than .008) in the subjects' tendency to imitate the experimenter. Paired comparisons between conditions showed that subjects in the imitation condition imitated significantly more (p less than .05) than subjects in either the nonimitation or modeling only condition. The nonimitation and modeling only conditions did not differ significantly. Theoretical and practical implications of the findings were discussed.

Child↗
PubMed1999

[The loss of human autonomy: utilization and imitative behaviors].

In 1981, when François Lhermitte described utilisation behaviour, his experience was based on 40 patients with bilateral frontal lesions and 5 cases of unilateral lesions. This behaviour was never observed in normal subjects or in patients whose lesions spared the frontal lobes. The description of imitation behaviour followed shortly after. In 1986, of the 125 patients studied, 40 presented an imitation behaviour without utilisation behaviour, 35 had both types of abnormal behaviour and 50 had neither. Continuing his study of patients presenting a frontal syndrome, Lhermitte showed that dependence on objects and dependence on individuals can be prolonged in the form of a dependence on social context which ultimately characterises the loss of autonomy. Lastly, in 1993, he noticed that certain major depressive states gave rise to an utilisation and imitation behaviour similar to the type of behaviour resulting from a frontal syndrome of organic origin. The concept of loss of autonomy must be discussed in relation to the notion of intentionality of the various manifestations of loss of autonomy. Pathological prehension and the grasping reflex no longer provide a satisfactory explanation. Electrophysiology and the study of regional activity in the cerebral cortex associated with the preparation and execution of the movement have led to these phenomena being viewed in a new light. With the concept of loss of autonomy, the distinction between the mechanisms underlying intention and those which modulate actions in response to external demands is now seen to be well-founded. François Lhermitte opened the way.

Behavior↗
PubMed1986

Human autonomy and the frontal lobes. Part I: Imitation and utilization behavior: a neuropsychological study of 75 patients.

A type of pathological behavior, imitation behavior (IB), is newly described. In this behavior patients imitate the examiner's gestures, although not instructed to do so. Patients explain that they thought they had to imitate the examiner. IB is the first stage of utilization behavior (UB). Neuropsychological examination of 40 patients with IB, of 35 with UB, and of 50 disease controls demonstrates the existence of a frontal syndrome and two determining features of such behavior: dependence on (1) the social and (2) the physical environments. Loss of intellectual control was also required for the occurrence of such behavior. UB and/or IB were present in 96% of the 29 patients with focal lesions of the frontal lobes. Computed tomographic scans in 26 of these patients showed involvement of the inferior half of the anterior part of one or both frontal lobes. IB and UB are interpreted as release of parietal lobe activities, resulting from impairment of frontal lobe inhibition.

Behavior↗
PubMed1980

Imitation: a mechanism of play behavior.

Imitation, as a critical mechanism of play behavior, is a primary learning process in child development that has received scant attention in therapists' work with children. The purpose of this study is to conceptualize a system of imitation for occupational therapy within the framework of play behavior, and to analyze this process by using system categories. A case is presented to show how the imitation process can be specifically analyzed and influenced. The imitation process, when applied in clinical practice, could broaden the perspective of existing clinical interventions with children.

Child↗
PubMed2000

[Hyperlexia in an adult patient with lesions in the left medial frontal lobe].

A 69-year-old right-handed woman developed a transcortical motor aphasia with hyperlexia following resection of a glioma in the left medial frontal lobe. Neurological examination revealed grasp reflex in the right hand and underutilization of the right upper extremity. An MRI demonstrated lesions in the left medial frontal lobe including the supplementary motor area and the anterior part of the cingulate gyrus, which extended to the anterior part of the body of corpus callosum. Neuropsychologically she was alert and cooperative. She demonstrated transcortical motor aphasia. Her verbal output began with echolalia. Furthermore hyperlexia was observed in daily activities and during examinations. During conversation she suddenly read words written on objects around her which were totally irrelevant to the talk. When she was walking in the ward with an examiner she read words written on a trash bag that passed by and signboards which indicated a name of a room. Her conversation while walking was intermingled with reading words, which was irrelevant to the conversation. She also read time on analog clocks, which were hung on a wall in a watch store. In a naming task, she read words written on objects first and named them upon repeated question about their names. When an examiner opened a newspaper in front of her without any instructions she began reading until the examiner prohibited it. Then she began reading again when an examiner turned the page, although she remembered that she should not read it aloud. She showed mild ideomotor apraxia of a left hand. Utilization behavior, imitation behavior, hypergraphia, or compulsive use of objects was not observed throughout the course. Hyperlexic tendency is a prominent feature of this patient's language output. Hyperlexia was often reported in children with pervasive developmental disorders including autism. There are only a few reports about hyperlexia in adults and some of them were related to diffuse brain dysfunction. Hyperlexia of our patient was associated with echolalia but not with the other "echo" phenomena, which may be because the lesion was unilateral on the left side. Dysfunction of the left supplementary motor area could lead to disinhibition of regulatory mechanism of verbal output in response to auditory and visual stimuli.

Aged↗
PubMed1998

[Releasing phenomenon of learned movements].

Involuntary movements that resembled the shooting of a basketball and piano playing were observed after brain damage in a 13-year-old female and a 74-year-old female, respectively. The movements were characterized as involuntarily triggered movements that occurred in the presence and absence of exteroceptive stimuli, movements had been practiced repeatedly just before the occurrence of the brain damage, and that could be stopped on command. According to the MRI findings, the lesions extended into the pre-supplementary motor area (pre-SMA). The characteristics of the patients movements were different from previously reported involuntary movements such as compulsive manipulation of tools, utilization behavior, and imitation behavior. Hikosaka et al (1996) reported the role of the pre-SMA in learning new sequential procedures. We speculate that damage to the pre-SMA may be associated with the etiology of these movements.

Adolescent↗
PubMed1993

Behavioral antecedents of pediatric poisonings.

To determine how the behavior of 3- to 7-year-olds might contribute to pediatric poisoning, a taxonomy of pediatric ingestions was conceptualized and tested. Thirty-nine of 50 caretakers who called the Middle Tennessee Poison Center about poison ingestions by a child in this age group provided details of the poisoning history and family characteristics. Histories were coded by a psychologist according to the 14 antecedent conditions of the poisoning taxonomy. Improper storage, noncompliant behavior, curiosity, misinterpretation of the substance, improper child monitoring, and imitative behavior were judged the most common antecedent conditions of these ingestions. Lack of knowledge of poison prevention methods was infrequently coded. Noncompliant behavior as a condition of the poisoning was associated with parental reports of general child behavioral problems. Ingestions involving imitative behavior were associated with parental report of poor social supports. The findings highlight the need to address behavior in designing poison prevention programs.

Child↗