Social working memory (WM) has distinct neural substrates from canonical cognitive WM (e.g., color). However, no study, to the best of our knowledge, has yet explored how social WM develops. The current study explored the development of social WM capacity and its relation to theory of mind (ToM). Experiment 1 had sixty-four 3- to 6-year-olds memorize 1-5 biological motion stimuli, the processing of which is considered a hallmark of social cognition. The social WM capacity steadily increased between 3- and 6-year-olds, with the increase between 4 and 5 years being sharp. Furthermore, social WM capacity positively predicted preschoolers' ToM scores, while nonsocial WM capacity did not; this positive correlation was particularly strong among 4-year-olds (Experiment 2, N = 144).

Individuals with autism spectrum disorders (ASD) have shown impaired performance in canonical and nonsocial working memory (WM). However, no study has investigated social WM and its early development. Using biological motion stimuli, our study assessed the development of social and nonsocial WM capacity among children with or without ASD across the age span between 4 and 6 (N = 150). While typically developing (TD) children show a rapid development from age 5 to 6, children with ASD showed a delayed development for both social and nonsocial WM capacity, reaching a significant group difference at age 6. Furthermore, we found a negative correlation between social (but not nonsocial) WM capacity and the severity of autistic symptoms among children with ASD. In contrast, there is a positive correlation between both types of WM capacity and intelligence among TD children but not among children with ASD. Our findings thus indicate that individuals with ASD miss the rapid development of WM capacity in early childhood and, particularly, their delayed social WM development might contribute to core symptoms that critically depend on social information processing.

With regard to the study of temperament and motivation in young children, exuberance, an important temperamental characteristic of the approach motivational system, has been relatively understudied in comparison with behavioral inhibition. However, due to the relationship between exuberance and behavioral regulation (e.g., problem behavior, task persistence), it is an important topic of study. Accordingly, this study examined whether the incentive value of goals moderated the relationship between exuberance and persistence in 109 Chinese preschoolers. Children's temperamental exuberance was assessed by behavioral observation and parental report. Their persistence was measured in two goal-blocked contexts (tower-building [TB] and locked box [LB]). In each task, children were randomly assigned to either a high-or low-incentive condition designed to vary the incentive value of a given goal. Results suggested that exuberance was positively associated with persistence in the high-incentive condition of TB and in both conditions of LB. The results highlight the incentive value of goals as an important factor for behavioral regulation development in exuberant Chinese children.

Visual working memory (WM) plays a pivotal role in integrating fragments into meaningful units, but no study has addressed how visual WM integration takes place in children. The current study examined whether WM integration emerges once preschoolers master Gestalt cue and can retain two representations in WM (automatic integration hypothesis), or still needs time to mature (maturation‐of‐integration hypothesis). Four experiments (N = 168, 81 females, 4‐ to 6‐year‐olds, Chinese, in Hangzhou, China, from 2016.10 to 2021.11) were conducted. Although 4‐year‐olds can retain two objects in WM and benefit from Gestalt cues in simultaneous display (Cohen's ds >1.00), they failed when memory arrays were presented sequentially. Meanwhile, 5‐ and 6‐year‐olds consistently demonstrated WM integration ability (all Cohen's ds >0.69), supporting the maturation‐of‐integration hypothesis.