Timing of presentation of prenatal auditory stimulation alters auditory and visual responsiveness in bobwhite quail chicks

One group of bobwhite quail embryos (Colinus virginianus) was exposed to 10 min/hr of bobwhite chick contentment calls immediately followed by 10 min/hr of bobwhite chick distress calls. A 2rid group of embryos was exposed to the same auditory stimulation but in the opposite order of presentation. Postnatal testing revealed that chicks exposed prenatally to the bobwhite chick contentment call and distress call (in either order of presentation) continued to respond to maternal uditory cues into later stages of postnatal development compared with unmanipulated chicks. Chicks exposed prenatally to the contentment call followed by the distress call showed an accelerated pattern of visual responsiveness to maternal cues, whereas chicks exposed prenatally to the distress call followed by the contentment call showed eficits in the normal pattern of perceptual visual responsiveness, uggesting that the auditory stimulation preeocial vian embryos encounter 1st is influential in directing early intersensory development. Results from a number of studies with precocial birds suggest that the effect that manipulations of perinatal sensory stimulation might have on early perceptual develop-ment is likely to depend on a number of nested factors, including the amount of stimulation provided or denied, the type of sensory stimulation presented tothe young organism, and the timing of the stimulation in relation to the stage o