A developmental transition in prehension modeled as a cusp catastrophe

Wimmers, R. H.; Savelsbergh, Geert J.P.; Kamp, John van der; Hartelman, P.A.I.

doi:10.1002/(sici)1098-2302(199801)32:1<23::aid-dev3>3.0.co;2-v

Cited by 28 publications

(10 citation statements)

References 34 publications

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“…If the solution spaces for cognitive and motor problems differ, then control parameters may not be the same, or similar change in the control parameter may have quite different effects on creativity (e.g. as in the cusp catastrophe model, see Wimmers, Savelsbergh, van der Kamp, & Hartelman, 1998). However, the amount of formal modelling needed to genuinely evaluate the fruitfulness of such a general approach to creativity is clearly beyond the scope of this paper.…”

Section: Discussionsupporting

confidence: 89%

Motor creativity: the roles of attention breadth and working memory in a divergent doing task

Moraru

Memmert

Kamp³

2016

Journal of Cognitive Psychology

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Section: Discussionsupporting

confidence: 89%

Motor creativity: the roles of attention breadth and working memory in a divergent doing task

Moraru

Memmert

Kamp³

2016

Journal of Cognitive Psychology

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“…One prediction of the Dual Visuomotor Channel theory of reaching is that development should feature independence in the maturation of the Reach and the Grasp. Indeed, a number of previous lines of investigation have noted that reaching without grasping occurs at an earlier developmental age than reaching with grasping (Von Hofsten and Lindhagen, 1979 ; von Hofsten, 1984 ; Savelsbergh and van der Kamp, 1994 ; Wimmers et al, 1998a , b ). Nevertheless, there are divergent predictions related to the significance of the independence of behaviors described as reaching and grasping.…”

Section: Introductionmentioning

confidence: 99%

Independent development of the Reach and the Grasp in spontaneous self-touching by human infants in the first 6 months

2015

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The Dual Visuomotor Channel Theory proposes that visually guided reaching is a composite of two movements, a Reach that advances the hand to contact the target and a Grasp that shapes the digits for target purchase. The theory is supported by biometric analyses of adult reaching, evolutionary contrasts, and differential developmental patterns for the Reach and the Grasp in visually guided reaching in human infants. The present ethological study asked whether there is evidence for a dissociated development for the Reach and the Grasp in nonvisual hand use in very early infancy. The study documents a rich array of spontaneous self-touching behavior in infants during the first 6 months of life and subjected the Reach movements to an analysis in relation to body target, contact type, and Grasp. Video recordings were made of resting alert infants biweekly from birth to 6 months. In younger infants, self-touching targets included the head and trunk. As infants aged, targets became more caudal and included the hips, then legs, and eventually the feet. In younger infants hand contact was mainly made with the dorsum of the hand, but as infants aged, contacts included palmar contacts and eventually grasp and manipulation contacts with the body and clothes. The relative incidence of caudal contacts and palmar contacts increased concurrently and were significantly correlated throughout the period of study. Developmental increases in self-grasping contacts occurred a few weeks after the increase in caudal and palmar contacts. The behavioral and temporal pattern of these spontaneous self-touching movements suggest that the Reach, in which the hand extends to make a palmar self-contact, and the Grasp, in which the digits close and make manipulatory movements, have partially independent developmental profiles. The results additionally suggest that self-touching behavior is an important developmental phase that allows the coordination of the Reach and the Grasp prior to and concurrent with their use under visual guidance.

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“…An important question that follows from the preceding considerations is what would have happened to the stability of the two identified modes of prehension if the longitudinal study would have been extended beyond 24 weeks of age. Considering the fact that the reaches of 3 individual infants were always followed by a grasp at the end of the longitudinal study, we consider it reasonable to assume that, within the present experimental setup, each individual participant would have reached this 100% occurrence score after a certain time, as, in fact, is supported by the data of a cross-sectional study (Wimmers, Savelsbergh, Van der Kamp, & Hartelman, 1998). However, this does not imply that reaching without grasping will be lost altogether as a behavioral mode.…”

Section: Discussionmentioning

confidence: 63%

“…Thus, by fitting behavioral data to the cusp (Cobb 1978(Cobb , 1980(Cobb , 1981Cobb & Zacks, 1985), it can be evaluated whether specific, independent variables act as control parameters. By using this method, Wimmers et al (1998) found that the combination of arm weight and arm circumference might contribute to the control parameter which induces the developmental transition form reaching without to reaching with grasping. Only by finding the relevant control parameters can it be further demonstrated that the development of prehension undergoes phase transitions.…”

Section: Identification Of Control Parametersmentioning

confidence: 99%

Evidence for a phase transition in the early development of prehension

et al. 1998

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A longitudinal study was conducted to examine the hypothesis that the development of prehension during the first 5 months of life is characterized by the presence of a discontinuous phase transition. Ten infants were observed weekly from 8 to 24 weeks of age. Video recordings were made of movements toward an attractive object which were classified according to two behavioral categories: reaching without grasping and reaching with grasping. The time evolution of the relative incidence of these behavioral categories was analyzed statistically. Evidence was found for a sudden jump from a (developmental) state in which reaching without grasping is predominant to a state in which reaching with grasping is predominant. Evidence was also found for bimodality, inaccessibility, and anomalous variance. In combination, these findings support the hypothesis that the investigated behavioral change constitutes a discontinuous phase transition. The behavioral change in question occurred at the moment in developmental time at which the attractor strength of reaching for objects as such relative to that of other behavioral activities appeared to be increased.

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A developmental transition in prehension modeled as a cusp catastrophe

Cited by 28 publications

References 34 publications

Motor creativity: the roles of attention breadth and working memory in a divergent doing task

Motor creativity: the roles of attention breadth and working memory in a divergent doing task

Independent development of the Reach and the Grasp in spontaneous self-touching by human infants in the first 6 months

Evidence for a phase transition in the early development of prehension

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