Seven-month-old infants appear to learn means-end skills, such as pushing a button to retrieve a distant toy (Psychological Review 104 (1997) 686). The present studies tested whether such apparent means-end behaviors are genuine, or simply the repetition of trained behaviors under conditions of greatest arousal, as suggested by a dynamic systems reinterpretation. When infants were trained to repeat behaviors that did not serve as means to retrieving toys (pushing a button to light a set of distant lights), their button-pushing differed significantly from infants for whom button-pushing served as a means for retrieving toys. Further, infants demonstrated means-end skills with behaviors that they had not been trained to repeat. Implications for early means-end abilities and for debates surrounding the interpretation of infant behavior are discussed.
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http://dx.doi.org/10.1016/s0010-0277(02)00007-0 | DOI Listing |
J Exp Child Psychol
August 2024
Department of Biology, University of Oxford, Oxford OX1 3RB, UK.
Tool use is primarily, but not exclusively, present in species with otherwise advanced cognitive traits. However, the interaction between such traits and conspecific inter-individual variation in the presence, complexity, or intensity of tool use is far from being established. We addressed this matter among human infants, seeking factors that relate to differences in tool use.
View Article and Find Full Text PDFBraz J Phys Ther
March 2024
Department of Physical Therapy, Biomechanics & Movement Science Program, University of Delaware, Newark, DE, USA. Electronic address:
Background: Children with motor delays are at increased risk for delayed means-end problem-solving (MEPS) performance.
Objectives: To evaluate children with motor delays: 1) the impact of motor delay severity and MEPS mastery timing on developmental trajectories of MEPS; and 2) the effectiveness of Sitting Together And Reaching To Play (START-Play) intervention for improving MEPS.
Methods: This represents a secondary analysis from a multi-site randomized controlled trial, with blinded assessors and prospective registration.
R Soc Open Sci
December 2021
Department of Psychology, Memorial University of Newfoundland, St John's, Canada.
String-pulling is among the most widespread cognitive tasks used to test problem-solving skills in mammals and birds. The task requires animals to comprehend that pulling on a non-valuable string moves an otherwise inaccessible food reward to within their reach. Although at least 90 avian species have been administered the string-pull test, all but five of them were perching birds (passeriformes) or parrots (psittaciformes).
View Article and Find Full Text PDFDev Psychobiol
March 2019
Department of Kinesiology, Physical Therapy Program, University of Connecticut, Storrs, Connecticut.
Our study compared means-end exploration in infants at risk (AR) for autism and typically developing (TD) infants using a nested box paradigm. Sixteen AR and 16 TD infants were observed at 9, 12, and 15 months with follow-up at 18 and 24 months. We collected video data on three tasks involving retrieval of a small toy by opening (a) an opaque box, (b) a transparent box, and (c) two nested boxes.
View Article and Find Full Text PDFJ Comp Psychol
August 2018
Behavioral Ecology & Sociobiology Unit.
Apes and some New and Old World monkeys (i.e., haplorhine primates) are known to routinely use tools.
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