Biomedical subjects

Delphine Picard

Publications and source records attributed to Delphine Picard.

3 recordsLinked to original sources

PubMed2005

Partial perceptual equivalence between vision and touch for texture information.

The present study examined the extent to which vision and touch are perceptually equivalent for texture information in adults. Using Garbin's method, we selected two sets of textures having high versus low cross-modal dissimilarity values between vision and touch (Experiment 1). The two sets of textures were then used as material in a cross-modal matching task (Experiment 2). Results showed that asymmetries occurred in the performances when the stimuli had high cross-modal dissimilarity values, but not when the stimuli had low cross-modal dissimilarity values. These results extend Garbin's findings on shape information to the texture domain and support the idea that partial perceptual equivalence exists between vision and touch.

Adult↗

PubMed2005

Are young children's drawings canonically biased?

In a between-subjects design, 4- to 6-year-olds were asked to draw from three-dimensional (3D) models, two-and-a-half-dimensional (212D) models with or without depth cues, or two-dimensional (2D) models of a familiar object (a saucepan) in noncanonical orientations (handle at the back or at the front). Results showed that canonical errors were produced mainly by the youngest children in the 3D models copying condition. A large proportion of errors did not, however, reflect biases toward the participants' "own" view of the object; rather, these errors reflected biases toward their "best" view of the object. Drawing from models having fewer than three dimensions resulted in a significant increase in view-specific productions in all children for the back orientation. When a more complex front orientation of the object was proposed, sensitivity to model type developed gradually with age. Results are discussed in terms of the flexibility of the mental model that mediates between children's perception of a model object and the depiction decisions.

Art↗

PubMed2003

Perceptual dimensions of tactile textures.

The present study investigated the perceptual dimensions of everyday tactile textures and the semantics associated with touch experiences. In Experiment 1, the nature of the tactile descriptors present in the memory of 40 volunteers was investigated. Results suggested the existence of a limited but consensual tactile repertory. In Experiment 2, 20 volunteers used a free-sorting task to sort 24 car seat ' materials, with different tactile properties, on the basis of perceived similarity. Sorted groups were then characterized further by producing verbal labels. Multidimensional scaling and correspondence analysis indicated that the tactile texture space did not exceed four dimensions. The hypothesized perceptual dimensions were soft/harsh, thin/thick, relief and hardness. Further evidence for the relevance of these dimensions was provided in Experiment 3, in which participants were asked to evaluate the stimuli according to unipolar adjective scales corresponding to the previously derived dimensions.

Adult↗