models. The role of brain changes in attention development is a natural
extension of work in this field. Techniques from neuropsychology, neuro-
imaging, and neuroscience-based experimental psychology are now being
applied to the study of developmental changes in attention.

Which brings us to the current book. Developmental research in young
infants, in children, and in the life span provides an important complement
to work with adults in the understanding of attention. Many neural systems
are immature, or nonfunctional, in the young infant. The lack of these
systems, corresponding behavioral characteristics, and the developmental
onset of the neural and behavioral systems, provides some information
about how these neural systems are expressed in intact adults. Similarly,
the changes in brain systems in the elderly (e.g., correlates of Alzheimer's)
and changes in attention in the elderly may be considered in a similar
light. This volume provides several models of the neural bases of attention,
and details how developmental research on these topics leads to a fuller
understanding of the cognitive neuroscience of attention. This book pro-
vides a contemporary summary of work in this area and a systematic back-
ground for further study of attention development from a cognitive neu-
roscience perspective.

Part I of the book deals with the neural basis of eye movements, and
how attention development may be characterized based on an under-
standing of development in those neural systems. Part II explores the overt
and covert orienting of attention, attention directed to objects and to
spatial locations, and the relation of attention development and brain
development to more general issues in cognitive development. Part III
contains chapters on the neural basis of attention development as related
to memory, possible neural relation to individual differences in infant
attention and cognition, and a life-span approach to studying attention
development. Each section includes an invited "summary and commentary"
chapter that highlights some of the issues raised.

The part sections are suggestions for coordinating chapters, but are not
meant to be absolute boundaries. For example, many of the concepts
involved in the covert shift of attention found in the second section have
their basis in the neural systems controlling eye movements discussed in
Part I. Thus, the chapters by Rafal, and Hood, Atkinson, and Braddick,
borrow heavily on concepts introduced in the chapters by Schiller, and
Maurer and Lewis; in the third section the chapter by Enns, Brodeur, and
Trick on life-span changes in covert attention relies on concepts presented
in Parts I and II. Similarly, the development of the object concept depends
on delayed recognition memory presumed by Bell in the second section
to be based on development in the frontal lobes, and thus is related to
recognition memory development presented by Nelson and Dukette, and
related to individual differences in infant cognition discussed by Colombo

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