Children's fuzziness leads to increased variance in the data, data loss, and high dropout rates in developmental studies. This study investigated the importance of 20 factors on the person (child, caregiver, experimenter) and situation (task, method, time, and date) level for the data quality as indicated via the number of valid trials in 11…

When children first learn to count, what do they understand about the structure of the count system? The present study investigated English-speaking children's ability to generalize the rules that structure their count list to novel contexts. A total of N = 86 children (3;0-6;11) completed a battery of tasks aimed at measuring their understanding…

Metacognitive reasoning is central to decision-making. For every decision, we can also judge our trust in that decision, or our level of "confidence." The mechanisms and representations underlying reasoning about confidence remain debated. We test whether children rely on "processing fluency" to infer their own confidence: do…

Learning takes time: Performance usually starts poorly and improves with practice. Do children intuit this basic phenomenon of skill learning? In preregistered Experiment 1 (n = 125; 54% female; 48% White; collected 2022-2023), US 7- to 8-year-old children predicted improved performance, 5- to 6-year-old children predicted flat performance, and…

Background: The transmission of attachment from parent to child is a well-known phenomenon. Previous research documented evidence supporting the transmission of attachment from parents to their children, with parental sensitivity serving a mediating role. Nevertheless, a "transmission gap" exists. Objective: In the current pre-registered…

This research with two studies examined whether young children's moral judgments of honesty and dishonesty predict their actual cheating behavior. Participants were 200 children aged 3-6 years (2021-2022. Study 1: N = 80, M[subscript age] = 4.96, 40 girls; Study 2: N = 120, M[subscript age] = 4.98, 60 girls; all middle-class Han Chinese). Children…

Children learn language by listening to speech from caregivers around them. However, the type and quantity of speech input that children are exposed to change throughout early childhood in ways that are poorly understood due to the small samples (few participants, limited hours of observation) typically available in developmental psychology. Here…

This study explored the salient characteristics of transactions within parent-child engagement and investigated relationships between transactional characteristics and future identification of autism. The main aims of the study were to (1) examine if parents/children and their initial behaviors impact the length of transaction; (2) determine…

Purpose: This study examined how subgroups of children with autism spectrum disorder (ASD) and developmental language disorder (DLD) perform on theory of mind (ToM) tasks and comprehend mental terms. Method: Eighty Hebrew-speaking children aged 5-6 years were divided into four groups: children with DLD, ASD and language impairment (ASD-LI), and…

Social understanding competence develops in sensitive and co-regulating caregiver interactions. Parental reflective functioning (PRF) and parenting stress can affect children's social understanding. This study investigated if children's social understanding was associated with PRF and parenting stress. Parents of 305 Italian children aged from 24…

A base model was tested composed of insecure attachment at age 3 years, poor emotional and behavioral self-regulation at age 5 years, and weak empathy at age 9 years predicted delinquency at age 15 years with and without the intervening influence of two dimensions of antisocial cognition: moral neutralization and cognitive impulsivity, both of…

The standard view on Theory of Mind (ToM) is that the mastery of the false belief (FB) task around age 4 marks the ontogenetic emergence of full-fledged meta-representational ToM. Recently, a puzzling finding has emerged: Once children master the FB task, they begin to fail true belief (TB) control tasks. This finding threatens the validity of FB…

Purpose: Although children with developmental language disorder (DLD) are known to have difficulties with emergent literacy skills, few available studies have examined emergent literacy skills in Arabic-speaking children with DLD. Even though Arabic language characteristics, such as diglossia and orthographic structure, influence the acquisition…

We investigated longitudinal relations between internalizing, externalizing, and total behaviors that challenge in young children on the autism spectrum and mothers' parenting stress. Participants included 93 mothers of children on the autism spectrum aged 27.89-65.84 months, who completed questionnaires on maternal parenting stress, and…

Research Findings: The present study investigated the potential mediating role of maternal parenting in the intergenerational effects of maternal childhood traumatic experiences (CTEs) on prosocial behaviors of their offspring and examined whether the offspring's sensory processing sensitivity (SPS) moderates this association using a 1-year…