Much of what psychologists know about infant perception and cognition is based on habituation, but the process itself is still poorly understood. Here the authors offer a dynamic field model of infant visual habituation, which simulates the known features of habituation, including familiarity and novelty effects, stimulus intensity effects, and…

The present research examined alternative accounts of prior violation-of-expectation (VOE) reports that young infants can represent and reason about hidden objects. According to these accounts, young infants' apparent success in these VOE tasks reflects only novelty and familiarity preferences induced by the habituation or familiarization trials…

Observed 12-month olds, with their mothers and independently, acting on objects from home and objects brought by the experimenter as new exemplars of previous toys. Found that conventional actions were more frequent in joint than in independent activity. In independent activity, conventional actions were more frequent with customary than with…

Two experiments tested predictions of dual-route-cascaded and triangle frameworks regarding effect among first-graders of having a word in oral vocabulary prior to reading that same word. Results suggest that word-specific phonological information is represented in the reading system independently of semantic or articulatory influences. Results…

Examines the phenomenon of the"first time"--a teenager's first date, first job, first sexual experience. Since these experiences are imbued with an inordinate amount of emotional investment, they offer an alternative understanding to adolescents' emotional underpinnings and clarify why many adolescents experience stressful times during this stage…

Studied feeding-related arousal effects on a visual recognition paired-comparison task at newborn, 1, and 4 months of age. Found that newborns and 1-month olds shifted from a familiarity preference before feeding to a novelty preference after feeding. Control-group testing confirmed that shift was not due to increased stimulus exposure. By 4…

Two experiments examined memory of 7-month-olds after 2-week retention interval for passages of two Mozart movements heard daily for 2 weeks. Results suggested that the infants retained familiarized music in long-term memory and that their listening preferences were affected by the extent to which familiar passages were removed from the musical…

Used event-related potentials (ERPs) and fixation duration to examine infants' responses to events. Found that ERPs, but not looking time, distinguished between familiar events presented frequently rather than infrequently, and between familiar and novel events presented infrequently. Proposed that ERPs reflected updating of working memory or…

Eye movements of 12-week-old infants were recorded in a visual encoding experiment. Results showed that infants who encoded more slowly scanned less extensively over the stimulus and engaged in prolonged fixation. An experiment with two-week olds showed significant age differences in the manner of visual scanning. (BC)

Cardinality responses are affected by both the direction and nature of the elements in the counting sequence. Error analysis suggests six stages in the acquisition of cardinality. Although there appears to be a developmental dependency between counting and cardinality, this relationship is not significant in all cases. (RH)

Two experiments used paired-comparisons to investigate 3-month olds' recognition of dynamic visual events after various retention intervals. Results indicated a changing pattern of attentional preferences over time consistent with models of infant recognition memory in which novelty, familiarity, and null preferences are considered conjointly and…

Examined how Japanese 2- and 4-year-olds assigned meaning to novel nouns associated with familiar and unfamiliar animals and inanimate objects. Found that in the absence of useful information from syntax, the 2-year-olds were able to fast map a noun to its meaning by elegantly coordinating word-learning biases and other available sources of…

Examined cortisol and behavioral reactions of 36-month olds in an unfamiliar playgroup. Found that, when compared to at-home levels, cortisol levels were lower when children were receiving adult support and higher for one-third of children when interacting with peers alone, and that children showing adrenocortical arousal before the challenging…

Year Eight students that underwent novelty-reducing pre-orientation to the physical environment of an interactive science museum and had prior experience visiting the museum learned more than their counterparts. Those exhibits most frequently recalled shared a combination of characteristics such as large physical size, prominence in the exhibit…

The importance of genetic factors in autism has prompted the development of mutant mouse models to advance our understanding of biological mechanisms underlying autistic behaviors. Mouse models of human neuropsychiatric diseases are designed to optimize (1) face validity, i.e., resemblance to the human symptoms; (2) construct validity, i.e.,…