Habituation is a highly conserved phenomenon that remains poorly understood at the molecular level. Invertebrate model systems, like "Caenorhabditis elegans," can be a powerful tool for investigating this fundamental process. Here we established a high-throughput learning assay that used real-time computer vision software for behavioral…

In two experiments, the authors evaluated the extent to which (a) individuals preferred engaging in object stereotypy versus observing an experimenter while the experimenter engaged in object stereotypy and (b) an experimenter's engagement in object stereotypy decreased the participants' engagement in object stereotypy. Results of Experiment 1…

Does the mirror system affect the control of speech? This issue was addressed in behavioral and Transcranial Magnetic Stimulation (TMS) experiments. In behavioral experiment 1, participants pronounced the syllable /da/ while observing (1) a hand grasping large and small objects with power and precision grasps, respectively, (2) a foot interacting…

Examination of the manneristic behavior (stereotyped or repetitive movement) of 542 blind and 365 sighted children was undertaken. Seventeen types of manneristic behavior were investigated, including head movement, eye poking and rubbing, body rocking, kicking, and posture distortion. Comparison of the behaviors observed in sighted and blind Ss…

Results of a study involving six autistic children (3-10 years old) indicated that self-stimulation occurred significantly more often with unfamiliar than with familiar therapists. There was a significant and negative correlation between the occurrence of self-stimulation and correct responding. (Author/CL)

The nature of eye-pressing as a visual stimulation mannerism in children with severely impaired eyesight is examined, and a possible physiological explanation (that self-stimulation occurs when the demand of the brain for meaningful visual information is not met) is offered. (CL)

Over 60 studies using behavioral strategies to suppress sterotypic responding in handicapped individuals were reviewed to identify populations studied, behavior observed, interventions employed, and relative effectiveness of interventions used alone or in combinations. Discussion center on relative effectiveness of interventions and their…

The paper examines the nature of abnormal stereotyped behavior, favoring a self-stimulation theory over one emphasizing an intrinsic oscillator mechanism. Questions of prevention are noted. (Author/CL)

Rett syndrome is a neuro-developmental disorder that almost exclusively affects females. In addition to neuro-developmental regression and loss of hand skills, apraxia, deceleration of head growth, and increasing spasticity and scoliosis, a number of behavioural features are also seen, including stereotypic hand movements, hyperventilation and…

Three punishment procedures--contingent applications of water mist, lemon juice, and vinegar--were evaluated as aversive treatment methods for a self-stimulatory behavior exhibited by a severely retarded 11-year-old male. The water mist procedure was as effective as lemon juice or vinegar, presented less physical threat to the client, and was…

When neural events are analyzed as stimuli and responses, functional relations among them and among overt stimuli and responses can be unveiled. The integration of neuroscience and the experimental analysis of behavior is beginning to provide empirical evidence of involvement of neural events in the three-term contingency relating discriminative…

Thirteen hyperactive and 13 control preschoolers participated in an examination of language and activity during listening tasks. Ss were administered three forms of the referential communication task. Their activity was recorded by a motion recorder strapped to the Ss' nondominant wrist and by observation. Transcriptions of the Ss' verbalizations…

Four developmentally delayed babies were given semicircular canal stimulation in an effort to facilitate their motor and reflex development. All of the children showed motor and/or reflex changes that were attributable to the vestibular stimulation. In addition, some evidence was obtained linking changes in stereotypic responding to the vestibular…

Analysis of effects of intertrial intervals on correct responding and self-stimulatory behavior by four autistic children (6-11 years old) revealed that short intertrial intervals produced decreased levels of self-stimulation and increased levels of correct responding. (Author/CL)