"All of us are very ignorant. What happens is
that not all are ignorant of the same things."

The H-V Curvature Illusion Across Lifespan

The Curvature Illusion Study investigates the development of the horizontal-vertical illusion across modalities (vision and touch) from childhood to old age. When young and older adults explore haptically raised-line curves both age group explorers overestimate the vertical. In contrast, adolescents did not show the haptic illusion but when they perform the same task visually, a stronger horizontal-vertical illusion appears, suggesting that the illusion develops later in touch that in vision. This program investigates systematically the different developmental trajectories for the visual and haptic horizontal-vertical curvature illusion and the involvement of working memory in the different mode of exploration in vision (simultaneous) and touch (successive) which make the later more dependent on the prefrontal cortex. This research project is conducted in collaboration with Dr. Morton A. Heller of Eastern Illinois University. This research project is being lead by Dr. Soledad Ballesteros and Dr. Julia Mayas.

Related Publications

Ballesteros, S., Mayas, J., Reales, J. M., & Heller, M. A. (2012). The effect of age on the haptic horizontal-vertical curvature illusion with raised-line shapes. Developmental Neuropsychology,37 (8), 653-667.

Heller, M. A., Smith, A., Schnarr, R., Larson, J., & Ballesteros, S. (2013). The horizontal-vertical curvature illusion in touch is present in 3D objects as well as raised-lines. American Journal of Psychology, 126 (1), 67-81.