EXCEED THE SPACE PROVIDED : __ The experiments in this proposal follow those from the first grant period in which I developed a model that successfully captured important aspects of the development of selective visual orienting over the range from 7 to 21 weeks of age. The proposed experiments address three goals: a) testing alternative quantitative models of selective visual orienting, b) refining aspects of the model to include individual differences, and c) extending the model to capture more complex visual inspection bouts and spatial context effects on visual orienting. Alternative models are pitted against each other with experiments in which these models makequantitatively different predictions. Development is examined by investigating the ability to orient to a minimum stimulus rather than a maximum stimulus (e.g., a nonmovingstimulus among moving stimuli). Data collected duringthe first grant period indicated likely individualdifferences in overall sensitivityto targets embedded within multi-element displays as well as individualdifferences in the strength of competition among the high and low salience elements in such displays. The current experiments test for the reliability of these individualdifferences and their longitudinal stability over the period from 7 to 21 weeks of age. Finally, eye tracking measures are added in several experiments to.develop more refined measures of visual inspection and visual orienting and learning or repetition effects are investigated for their possible role in early visual attention. These experiments will extend and refine our understanding of the selectivity of early visual attention during an age period in which visual attention and its underlying neural substrate are still developing. PERFORMANCE SITE ========================================Section End===========================================
| Dannemiller, James L (2005) Evidence against a maximum response model of exogenous visual orienting during early infancy and support for a dimensional switching model. Dev Sci 8:567-82 |
| Dannemiller, J L; Stephens, B R (2001) Asymmetries in contrast polarity processing in young human infants. J Vis 1:112-25 |
| Dannemiller, J L (2000) Competition in early exogenous orienting between 7 and 21 weeks. J Exp Child Psychol 76:253-74 |
| Dannemiller, J L (1998) Temporal modulation enhances the efficiency of spatial offset discriminations by 6-month-olds. Vision Res 38:2127-34 |
| Dannemiller, J L (1998) A competition model of exogenous orienting in 3.5-month-old infants. J Exp Child Psychol 68:169-201 |
