Juan Carlos Gómez

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This article explores the possible cognitive function associated with pointing gestures from a Vygotskian perspective. In Study 1, 39 children who were 2-4years of age were observed in a solitary condition while solving a mnemonic task with or without an explicit memory demand. A discriminant analysis showed that children used noncommunicative pointing(More)
Although primates have often been found to co-orient visually with other individuals, members of these same species have usually failed to use co-orientation to find hidden food in object-choice experiments. This presents an evolutionary puzzle: what is the function of co-orientation if it is not used for a function as basic as locating resources?(More)
Algorithms for 3D head pose and facial expression tracking using a single camera (monocular image sequences) is presented in this paper. The proposed method is based on a combination of feature-based and model-based approaches for pose estimation. A generic 3D face model, which can be adapted to any person, is used for the tracking. In contrast to other(More)
Formal language theory has been extended to two-dimensional patterns, but little is known about two-dimensional pattern perception. We first examined spontaneous two-dimensional visual pattern production by humans, gathered using a novel touch screen approach. Both spontaneous creative production and subsequent aesthetic ratings show that humans prefer(More)
Individuals with autism spectrum disorders (ASD) are often reported to be good at detecting minute changes in the environment. This study tested two factors in this phenomenon; detail-focus and reduced top-down influence of scene-schema expectations on spontaneous attention to visual scene elements. Using a change blindness paradigm, adults with ASD and(More)
A comprehensive system for facial animation of generic 3D head models driven by speech is presented in this article. In the training stage, audiovisual information is extracted from audiovisual training data, and then used to compute the parameters of a single joint audiovisual hidden Markov model (AV-HMM). In contrast to most of the methods in the(More)
Event schemas (generalized knowledge of what happens at common real-life events, e.g., a birthday party) are an important cognitive tool for social understanding: They provide structure for social experiences while accounting for many variable aspects. Using an event narratives task, this study tested the hypotheses that theory of mind (ToM) deficits and(More)