Elliott M. Blass – författare

This volume delves into the mechanisms and early principles of developmental psychobiology, neurobiology, and behavioural ecology. It reflects the three mainstreams of the discipline of proximal and biographical influences: neural mediation; development and flexibility and functionally significant changes that occur in the habitats of many species; as well as how connections have been forged among the disciplines.

ELLIOTT M. BLASS Fifteen years have passed since the first volume on developmental psychobiology (Blass, 1986) appeared in this series and 13 since the publication of the second volume (Blass, 1988). These volumes documented the status of the broad domain of scientific inquiry called developmental psychobiology and were also written with an eye to the future. The future has been revolutionary in at least three ways. First, there was the demise of a descriptive ethology as we had known it, to be replaced first by sociobiology and later by its more sophisticated versions based on quantitative predictions of social interactions that reflected relatedness and inclu­ sive fitness. Second, there was the emergence of cognitive science, including cogni­ tive development, as an enormously strong and interactive multidisciplinary effort. Making the "functional" brain more accessible made this revolution all the more relevant to our discipline. In the laboratory, immunocytochemical detection of immediate / early genes, such as los, now allows us to trace neuronal circuits activated during complex behaviors. The "functional" brain of primates, especially humans, was also made very accessible through neuroimaging with which we can look at and into brains as they solve and attempt to solve particular tasks. Those of us who were trained in neurology as graduate students two or three decades ago recognize only the people in white coats and patients in beds or on gurneys when we visit neurologi­ cal units today. The rest is essentially new.

The previous volume in this series (Blass, 1986) focused on the interface between developmental psychobiology and developmental neurobiology. The volume emphasized that an understanding of central nervous system development and function can be obtained only with reference to the behaviors that it manages, and it emphasized how those behaviors, in tum, shape central development. The present volume explores another natural interface of developmental psy­ chobiology; behavioral ecology. It documents the progress made by developmental psychobiologists since the mid-1970s in identifying capacities of learning and con­ ditioning in birds and mammals during the very moments following birth-indeed, during the antenatal period. These breakthroughs in a field that had previously lain dormant reflect the need to "meet the infant where it is" in order for behavior to emerge. Accordingly, studies have been conducted at nest temperature; infants have been rewarded by opportunities to huddle, suckle, or obtain milk, behaviors that are normally engaged in the nest. In addition, there was rejection of the exces­ sive deprivation, extreme handling, and traumatic manipulation studies of the 1950s and 1960s that yielded information on how animals could respond to trauma but did not reveal mechanisms of normal development. In their place has arisen a series of analyses of how naturally occurring stimuli and situations gain control over behavior and how specifiable experiences impose limitations on subsequent development. Constraints were identified on the range of interactions that remained available to developing animals as a result of particular events.