Exclusion constraints facilitate statistical word learning

The roles of linguistic, cognitive, and social-pragmatic processes in word learning are well established. If statistical mechanisms also contribute to word learning, they must interact with these processes; however, there exists little evidence for such mechanistic synergy. Adults use co-occurrence statistics to encode speech-object pairings with detailed sensitivity in stochastic learning environments (Vouloumanos, 2008). Here, we replicate this statistical work with nonspeech sounds and compare the results with the previous speech studies to examine whether exclusion constraints contribute equally to the statistical learning of speech-object and nonspeech-object associations. In environments in which performance could benefit from exclusion, we find a learning advantage for speech over nonspeech, revealing an interaction between statistical and exclusion processes in associative word learning.     

Sortal concepts and causal continuity: comment of Rips, Blok, and Newman (2006)

L. J. Rips, S. Blok, and G. Newman (2006) proposed that singular concepts, which support the tracing of individual objects across their existence, are governed by a principle of causal continuity. They purported to show that causal continuity is better than existing theories at explaining judgments of the persistence of individual objects. This article makes 3 points. First, the construct of causal connectedness entails a wide variety of different explanatory factors; calling them all causal has questionable explanatory value. There is little evidence that the ultimate basis for identity judgments in many cases is causal. Second, the authors suggest that causal knowledge is indeed important to identity, but that it is important in the context of sortal concepts; different causal information matters for different kinds of things. Finally, the authors consider whether causal knowledge or sortal concepts are more fundamental to tracing individual identity, that is, whether causal knowledge is necessary for identity judgments. The authors appeal to research in developmental psychology that has begun to address this debate, supporting the primacy of sortal concepts. Although there continues to be shortcomings of all theories of object persistence, it is not clear that the causal continuer theory brings new clarity to the puzzle.     

Young Children's Use of Contrast in Word Learning: The Case of Proper Names

Recent research has established that contrast can exert a powerful effect on early word learning. This study examined the role of contrast in young children's ability to learn proper names. Preschoolers heard a novel word for an unfamiliar stuffed animal in the presence of a second stuffed animal of either the same or a different kind. Children received contrastive information indicating that the word did not apply to the second animal. Children were more likely to interpret the word as a proper name if the second animal belonged to the same kind as the target than if it belonged to a different kind. Children did not appear to make a proper name interpretation in a control condition in which the second animal was not present, providing no contrastive information. The results reveal the strength of within-kind contrastive information to foster children's acquisition of proper names, highlighting the potency of comparison processes in early word learning.     

Executive functions in early childhood: The role of maternal and paternal parenting practices

We investigated the association between mothers' and fathers' harsh parenting and sensitive parenting practices and child's executive functions (EF) in early childhood in 607 families. We focused on three broad dimensions of child EF: Emergent metacognition, inhibitory self‐control, and flexibility measured with the parent‐reported Behavior Rating Inventory of Executive Function‐Preschool Version. Less sensitive parenting of the mother and harsher parenting of the father were related to lower scores of emergent metacognition and inhibitory self‐control. Parenting was not associated with child flexibility. This study extends previous research on the association between parenting and EF by the focus on the role of the father and demonstrates independent effects of mother and father on child EF.