Environmental Language Factors in Theory of Mind Development

Background/Objectives: Executive functions (EFs) and Theory of Mind (ToM) are often compromised in children with Specific Learning Disorders (SLD). Although evidence highlights the malleability of EF, studies have yet to investigate whether school-based interventions can enhance both cool and hot EF domains and support ToM development in this population. This study evaluated the effectiveness of a structured, classroom-based EF training program in improving cool EF, hot EF, and ToM in children with SLD. Methods: Forty students with SLD (aged 8-10 years) were allocated to an intervention group (n = 24) or a passive control group (n = 16). The program was delivered in small groups during regular school hours over 6-9 weeks (18 sessions). Pre- and post-intervention assessments measured cool EFs (working memory, planning, cognitive flexibility, inhibition), hot EFs (affective decision-making, delay of gratification), and ToM (false belief understanding, mental state/emotion recognition). Results: The intervention group showed significant within-group improvements in working memory, planning, and cognitive flexibility, whereas the control group showed no significant changes. Between-group comparisons revealed significant effects for working memory, planning, and ToM mental state/emotion recognition, with medium-to-large effect sizes. No significant group differences were found for hot EFs or ToM false belief understanding. Conclusions: These findings suggest that participation in a structured, school-based EF program is associated with selective improvements in specific cool EF components and one aspect of ToM in children with SLD, supporting the potential value of classroom-based interventions for cognitive and socio-cognitive development.

We examined deaf and hearing children's progression of steps in theory of mind (ToM) development including their understanding of social pretending. Ninety-three children (33 deaf; 60 hearing) aged 3-13 years were tested on a set of six closely matched ToM tasks. Results showed that deaf children were delayed substantially behind hearing children in understanding pretending, false belief (FB) and other ToM concepts, in line with their delayed uptake of social pretend (SP) play. By using a scaling methodology, we confirmed previous evidence of a consistent five-step developmental progression for both groups. Moreover, by including social pretence understanding, both deaf and hearing children's ToM sequences were shown to extend reliably to six sequential developmental steps. Finally and focally, even though both groups' sequences were six steps long, the placement of pretence relative to other ToM milestones varied with hearing status. Deaf children understood social pretending at an earlier step in the ToM sequence than hearing children, albeit at a later chronological age. Theoretically, the findings are relevant to questions about how universal developmental progressions come together along with culturally distinctive inputs and biological factors (such as hearing loss) to set the pace for ToM development.

This study examines the link between language abilities and Theory of Mind (ToM) development in individuals with Williams Syndrome (WS) and Down Syndrome (DS). We compared the results of 16 participants with WS, aged 6.3 to 27.2 years (Mean = 15.9 years, SD = 6.8 years), to those of 16 participants with DS, aged 10.7 to 23.9 years (Mean = 16.8 years, SD = 3.6 years). Using the French version of the ToM test-Revised (ToM test-R), we assessed three levels of ToM development: prerequisites, first-order beliefs, and second-order beliefs. Language abilities were evaluated using the Isadyle French language assessment battery, focusing on word comprehension, word production, syntax comprehension and production, and emotional lexicon. The results showed that the WS group performed significantly better in overall ToM skills in the ToM test-R compared to the DS group. Moreover, language skills were significantly associated with ToM development in the WS group, but not in the DS group. These findings underscore the importance of language development, particularly syntax and emotional understanding, in ToM acquisition. Through the application of a cross-syndrome approach, this study provides insights into how each syndrome impacts ToM development and the role of language in this process.

Weak theory of mind (ToM) ability is a core deficit in children with autism. A growing body of work has found that there is a close relation between complement syntax and ToM in autistic children. However, researchers have not yet investigated whether other linguistic components may explain the difficulties in ToM reasoning in autistic children. To determine whether verb factuality (i.e., mental and action verbs) is related to ToM ability, as measured by a false belief understanding (FBU) task after controlling the effect of complement syntax for Mandarin-speaking autistic children. Participants were verbal autistic children, aged 4-7 years. Their IQ performance (verbal, performance and total IQ) and the comprehension of complement syntax were evaluated. A total of 38 children scoring over 9 points in complement syntax test and 90 points in the verbal IQ test were selected to complete verb factuality and FBU task. The χ2 tests and correlation analyses were carried out on two relations: (1) ToM ability and understanding of verb factuality; and (2) ToM ability and comprehension of complement syntax. A total of 11 autistic children completed the action verb factuality task, while 14 completed the mental verb factuality task and 13 completed both tasks. Participants performed well on the verb factuality task, and their ToM performance appeared to be related to their linguistic ability, regardless of the type of verb (i.e., action or mental verb). However, complement syntax scores did not significantly predict the success of the FBU task for the autistic children. The results of this study link weaker ToM ability with the understanding of verb factuality among autistic children aged 4-7 and provide new evidence for the view that the development of language facilitates improvement of ToM skills. The findings shed new light on how language affects or determines social interactions. What is already known on the subject ToM ability is crucial for social interaction. It has been claimed that mental verb factuality (e.g., think, had thought) may play a role in the development of ToM reasoning in typically developing children, but whether there is a link between the mastery of verb factuality and ToM skills in autistic children is still unclear. What this study adds to existing knowledge Correlational analysis revealed links between verbal ToM measured by unexpected location task and factuality test of mental verbs as well as action verbs. More importantly, this study confirmed the extra role of verb factuality in explaining ToM ability after excluding the influence of the complement syntax. What are the potential or actual clinical implications of this work? This study suggests that the factuality of verbs could serve as a tool for autistic children to infer the mental states of others. Thus, training on this linguistic structure could be taken into consideration when improving the social skills of autistic children.

The aim of this study was to investigate the relationship between the development of theory of mind and conservation abilities. A secondary aim explored the development of children's theory of mind and conservation abilities using an inactive (standard) and active (modified) paradigm. It was predicted that there would be an association between the development of conservation and theory of mind abilities, independent of age or verbal ability. The second hypothesis predicted that children would demonstrate superior performance in the modified versions of these tasks when compared to standard conditions. The participants were 78 children aged between 3 years, 3 months and 6 years, 11 months of age who were administered two standard and two modified false belief tasks and three standard and three modified conservation tasks. Children were divided into a younger group and an older group to examine the age at which tasks were completed successfully. No direct association was found between theory of mind and conservation abilities. The findings indicate that any correlation between these cognitive abilities is determined by processes of maturation. There were no significant differences in children's performance on the modified and standard false belief tasks. However, both groups performed significantly better in the modified conservation condition when compared to the standard condition. While active involvement in conservation tasks may explain this difference, changes in context may have also contributed to the effect.

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Language and theory of mind in preschool children with specific language impairment

This study investigated Theory of Mind (ToM) development in children with hearing loss, comparing children with mild-to-moderate hearing loss (MHL, n = 26), severe-to-profound hearing loss (SHL, n = 31), and typical hearing (TH, n = 53), aiming to explore the differences between the three groups and potential factor related to the ToM development in children with hearing loss. Participants completed the ToM scale and language assessments. One-way ANOVA and Bonferroni post-hoc tests were used to analyze group differences, while Pearson's correlation examined relationships between ToM, language, and background variables. Results revealed that both MHL and SHL groups showed delays in overall ToM skills compared to TH peers, with the SHL group exhibiting more substantial delays. The MHL group demonstrated delays only in hidden emotion understanding, while the SHL group showed delays from knowledge access through false belief and hidden emotion tasks. Language comprehension was significantly correlated with ToM skills in both hearing loss groups. Aided audibility was associated with false belief understanding in the MHL group. The study highlights the impact of hearing loss severity on ToM development and emphasizes the crucial role of language comprehension in ToM skills. Findings suggest the need for tailored interventions addressing language and communication challenges to support ToM development in children with hearing loss.

This longitudinal study investigates theory of mind (ToM) development in middle childhood and its demographic and linguistic predictors. In this study, 194 Italian primary school children (Mage = 9.4 years; 47% girls; 28% with one or both Italian parents) were assessed four times over 2 years using a multi-modal ToM battery. Results confirmed longitudinal measurement invariance of the ToM battery. Latent growth modeling showed ToM growth from Time 1 to Time 3, followed by a plateau. Analyses revealed significant inter-individual variability at Time 1 but no variance in the rate of development. Higher verbal ability and having siblings predicted higher initial ToM, while non-native speakers began lower but showed greater gains. Findings extend existing accounts on ToM development.

Central to the interface of social-cognitive and communicative development is the growth of a theory of mind (ToM). ToM is mastered by most hearing children and deaf children of signing deaf parents by the age of 5 or 6 but is often seriously delayed in deaf children of hearing parents. This paper reviews recently published research on deaf children's ToM development and presents an original study consisting of eight longitudinal case histories that collectively map late-signing deaf children's ToM performance from 44 to 158 months of age. While five tentative conclusions can be posited from the collective research so far, further investigation of each of these possibilities is clearly needed.

Longitudinal tracking of 107 three- to-thirteen-year-olds in a cross-sequential design showed a 6-step theory of mind (ToM) sequence identified by a few past cross-sectional studies validly depicted longitudinal ToM development from early to middle childhood for typically developing (TD) children and those with ToM delays owing to deafness or autism. Substantively, all groups showed ToM progress throughout middle childhood. Atypical development was more extended and began and ended at lower levels than for TD children. Yet most children in all groups progressed over the study's mean 1.5years. Findings help resolve theoretical debates about ToM development for children with and without delay and gain strength and weight via their applicability to three disparate groups varying in ToM timing and sequencing.

Two studies addressed key theoretical debates in theory of mind (ToM) development by comparing (a) deaf native signers (n = 18), (b) deaf late signers (n = 59), and (c) age-matched hearing persons (n = 74) in childhood (Study 1: n = 81) and adulthood (Study 2: n = 70) on tests of first- and second-order false belief and conversational sarcasm. Results showed ToM development to be a life span phenomenon for deaf and hearing people alike. Native and late signers were outperformed by hearing peers on advanced ToM in childhood (M = 9 years), but in adulthood (M = 40 years), native signers had caught up, whereas late signers had not. Findings highlight the extended importance of conversational interaction for ToM growth.

The impact of visual-spatial abilities on theory of mind in children and adolescents with autism spectrum disorder

Children with Specific Language Impairment (SLI) often experience emotional and social difficulties. In general, problems in social emotional functioning can be cognitively explained in terms of Theory of Mind (ToM). In this mini-review, an overview is provided of studies on social-emotional functioning and ToM in preschoolers (average age from 2.3 to 6.2 years) with SLI. It is concluded that, similar to school-aged children with SLI, preschoolers with SLI have several social-emotional problems and that both cognitive and affective aspects of ToM are impaired in those children. Based hereon, three possible causal models for the interrelation between language, ToM and social emotional functioning are put forward. It is proposed that future research on the construct and measurement of early ToM, social emotional functioning and language development in preschoolers with SLI is needed to achieve early detection, tailored treatment, and ultimately insight into the pathogenesis of SLI.

Theory of Mind (ToM) encompasses a wide variety of abilities, which develop during childhood. However, to date most ToM research has focused on the single concept of false-belief understanding, and examined ToM only in young children. Furthermore, there is a lack of implementation of a longitudinal design, which examines the dynamics of the ToM construct over several years. Our longitudinal study measured the abilities of a group of 5-year-old children (n = 77) in mainstream education during three consecutive years, on aspects of ToM related to emotion understanding and false-belief understanding. The results provide support for significant improvements in emotion understanding and false-belief understanding between the ages of 5 and 7. Whereas emotion attribution was already largely developed at age 5, more intricate aspects of emotion understanding, such as understanding display rules and understanding mixed emotions showed significant developments. Over the course of the years, children also showed an increasing awareness of false-belief understanding. In addition to the developmental growth, the different ToM aspects were found to be relatively stable over time. Correlations as well as predictive relations between emotion understanding and false-belief understanding could be identified. Finally, there was evidence for the role of language ability in the development of the ToM aspects under consideration. The results support the notion that ToM abilities measured at age 5 are not just a snapshot but provide a longer-term outlook as well.