In response to Golinkoff, Hoff, Rowe, Tamis-LeMonda, and Hirsh-Pasek's (2018) commentary, we clarify our goals, outline points of agreement and disagreement between our respective positions, and address the inadvertently harmful consequences of the word gap claim. We maintain that our study constitutes a serious empirical challenge to the word…

Amid growing controversy about the oft-cited "30-million-word gap," this investigation uses language data from five American communities across the socioeconomic spectrum to test, for the first time, Hart and Risley's (1995) claim that poor children hear 30 million fewer words than their middle-class counterparts during the early years…

Self-regulation is of interest both to psychologists and to teachers. But what the word means is unclear. To define it precisely, two studies examined the American Psychological Association's system of controlled vocabulary--specifically, the 447 associated terms it presents--and used techniques from the Digital Humanities to identify 88 closely…

Analysis indicated that young children consistently differed in the initiation of interaction and the conflict contributions they elicited from peers. Relationship effects were found in games and contingent interaction. (RH)

Examines and rejects common criticisms of the causality concept; shows causality is a relation implied in the grammar of a language about objects. Discusses objective criteria for concepts of causal relations and explains how the concept of causality may be modified to have causes determine probabilities of outcomes. (Author/RH)

Four current approaches to understanding temperament are discussed. Theorists representing four postions--Goldsmith, Buss and Plomin, Rothbart, and Thomas and Chess--outline their views by reponding to six common questions. Commentaries highlighting differences and similarities between the positions are offered by Hinde and McCall. (Author/BN)

When 96 mothers and 46 fathers of 6- or 13-month-old infants independently generated behavioral cues they believed contributed to their perception of their infant's recent easiness/difficultness, few systematic differences were found between easy and difficult infants, 6- and 13-month-olds, males and females, and firstborn and later-born.…

Describes how developmental psychopathology differs from related disciplines, including abnormal psychology, psychiatry, clinical child psychology, and developmental psychology. Points out propositions underlying a developmental perspective and discusses implications for research in developmental psychopathology. (Author/RH)

Describes recent attempts to integrate developmental perspectives in research involving infant and child psychopathology. Definitions are offered, and various methods to foster the growth of developmental psychopathology are presented. (Author/RH)

Play has been difficult to define because it is an aspect of many activities rather than of just a specific kind of activity. Classic theorists such as Piaget and Vygotsky emphasized representational play as play in its purist form, but both immediate and ultimate functions of play can be discerned in simple physical activity play. (Author)

This article proposes a new schema for defining developmental stages in the drawing of geometrical objects. In four studies, children and adults drew cubes and cylinders. Data demonstrate that stages appear in invariant order with 2-year-olds drawing scribbles, single units appearing at 3 years, differentiated figures at 4 years, and integrated…

Cole, Martin, and Dennis (this issue) considered many important conceptual and methodological issues in their discussion of emotion regulation. Although it may be necessary to develop an integrated definition of the construct of emotion regulation, the definition provided in the Cole et al. article is too encompassing. It is important to…

Interview responses of 72 fifth-, eighth-, and eleventh-graders revealed developmental changes in the scope and nature of perceived peer influence and in the extent to which peer group reactions have an impact on self-evaluations. Developmental changes in the apparent reference-group functions of peer groups for adolescent identity formation are…

Examines the concept of utilization deficiency related to memory strategy development. Argues that problems with current definition obscure previous important theoretical distinctions and limit investigations of strategy inefficiencies that are likely to be important in understanding development of strategy use. Maintains that the developmental…

Focuses on the importance and meaning of the degree of spontaneity in memory strategy production. Situates the concept of utilization deficiency within current work on memory strategy heterogeneity, contextual support, and situation-specific skills. Concludes that work on utilization deficiencies helps balance the focus on early emergence of…