Despite its importance, studies involving developmental delay remain low in the last 10 years in Latin. The objective of the present study was to estimate and compare the prevalence of developmental delay during 2019-2022 in Mexican children under 5 years of age. This was a cross-sectional study carried out in Nuevo Leon, Mexico (n = 2,951).…

Statistical learning is a core ability for individuals in extracting and integrating regularities and patterns from linguistic input. Yet, the developmental trajectory of visual statistical learning has not been fully examined in the orthographic learning domain. Employing an artificial orthographic learning task, we manipulated three levels of…

This study examines the differences in third-party punishment and compensation behaviors in 3- to 5-year-old children (N = 114) in fair and unfair distribution contexts. Using both third-party punishment and compensation paradigms, the study involved Chinese-speaking preschool children. The results showed: (1) Children's intention and degree of…

This study aims to determine the differences or similarities between the violence suffered by student teachers in their intimate partner relationships, as well as the implications for their training as teachers. The method used was cross-sectional, quantitative, non-experimental, the sample, selected from a probability sampling by clusters, was…

Children's evaluations of empathizers were examined using vignette-based tasks (N = 159 4- to 7-year-old U.S. children, 82 girls, 52% White) between March 2023 and March 2024. Children typically evaluated empathizers positively compared to less empathic others. They rated empathic responses as more appropriate, selected empathizers as nicer, and…

When determining what others know, we intuitively consider not only whether they succeed but also their probability of success in the absence of knowledge (e.g., random guessing). Across three experiments (n = 240 North American 4-6-year-olds, data collected between 2020-2023) we find that 4-year-olds understand that tasks with a lower probability…

This study examined the acquisition of numeral classifiers in 120 monolingual Japanese children. Previous research has argued that the complex semantic system underlying classifiers is late acquired. Thus, we set out to determine the age at which Japanese children are able to extend the semantic properties of classifiers to novel items/situations.…

Despite considerable interest in children's ability to provide temporal information, there remain many unanswered questions about what children can provide and how to elicit this information. In Study 1, children (N = 147, aged 5 to 10 years) participated in an activity session. Either shortly after or 1 day later, children completed an interview…

Background: The transition to adulthood in contemporary industrialized society, which once followed a fairly standard pattern, has undergone many changes in terms of timing and order of events. Today's emerging adults are as likely as not to postpone their entry to college after high school, withdraw temporarily from studies after enrolling, and…

Implicit motor sequence learning is necessary to perform daily activities and is susceptible to age-related deficits. We examined how aging affects the learning of deterministic and probabilistic sequences assessed using the serial reaction time task and related variants. Both young and older adults demonstrated within-session learning of both…

The current research examined how seeking versus receiving help affected children's memory and confidence decisions. Baseline performance, when no help was available, was compared to performance when help could be sought (Experiment 1: N = 83, 41 females) or was provided (Experiment 2: N = 84, 44 females) in a sample of predominately White 5-, 7-,…

Across two studies, children ages 6-9 (N = 160, 82 boys, 78 girls; 75% White, 91% non-Hispanic) rated an inaccurate expert's knowledge and provided explanations for the expert's inaccurate statements. In Study 1, children's knowledge ratings decreased as he provided more inaccurate information. Ratings were predicted by age (i.e., older children…

Values serve as guiding principles, motivating specific behaviors, and actions. Peers spend a considerable amount of time together, thus offering a unique platform for the acquisition and development of values. During adolescence, a stage of life when youth are actively defining their identities, peers emerge as vital social agents, contributing…

Speech exhibits quasi-rhythmic regularities at multiple timescales, which seem to be crucial to comprehension. Both children's ability to extract rhythm from complex stimuli and to produce rhythmic patterns are known to undergo changes from infancy to adulthood. However, it remains unclear what rhythm skills specifically related to speech look…

The present study explored developmental differences in preschoolers' use of reported speech and internal state language in personal narratives. Three-, four-, and five-year-olds attending a laboratory preschool shared 204 stories about 'a time when you were happy/sad'. Stories were audio-recorded, transcribed, and coded for reported speech…