Abstract
Early sensory differences may cascade into later social-communication difficulties in autism, yet their impacts on broader functional outcomes have remained understudied. This study aimed to conduct a comprehensive investigation into the longitudinal impacts of sensory patterns, including sensory hyperresponsiveness, hyporesponsiveness, and sensory repetitions/seeking behavior, on various school-age outcome domains among a community sample of children with autistic and non-autistic conditions. We prospectively followed 1,517 children with caregiver-reported sensory questionnaires across three timepoints from infancy to school age. A subsample (n = 389; 88 with reported autism diagnosis/concerns) was further assessed with adaptive, maladaptive and participation outcome measures at age 6–7. Structural equation modeling approaches were used to evaluate the multivariate associations between latent growth parameters (i.e., intercepts and slopes) of sensory patterns and school-age outcomes. Increasing sensory hyperresponsiveness was directly associated with poorer adaptive/maladaptive outcomes and indirectly with lower participation in activities with higher functional demands across settings at school age. Elevated sensory hyporesponsiveness was associated with lower adaptive functioning, more externalizing problems, and lower classroom participation. Trajectories of sensory patterns accounted for more unique variances in adaptive functioning and participation in daily life settings with higher functional and environmental demands among autistic children compared to their non-autistic peers.
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Introduction
Sensory patterns, including hyperresponsiveness (HYPER; e.g., distressed when touched), hyporesponsiveness (HYPO; e.g., tuning out sounds), and sensory interests, repetitions, and seeking behaviors (SIRS; e.g., fascinated with lights), are commonly observed in autistic children, with prevalence rates ranging from 74 to 94% (Baranek et al., 2006; Ben-Sasson et al., 2019; Kirby et al., 2022). The incorporation of sensory patterns into the restricted, repetitive behaviors criteria in the DSM-5 (DSM-5; American Psychiatric Association, 2013), along with longitudinal evidence from population-based and infant-sibling studies indicating their early emergence and association with later autism outcomes (Chen et al., 2022b, 2024; Riboldi et al., 2023; Wolff et al., 2019), reflect the crucial role of sensory patterns in diagnosing and supporting autistic children. Beyond the autism spectrum, the estimated prevalence of elevated sensory patterns in population-based samples of school-aged children was 5 to 8% (Ahn et al., 2004; Jusilla et al., 2019). As sensory patterns are present across the neurodevelopmental continuum, it is important to understand their impact on other behavioral domains, such as adaptive functioning and maladaptive behavior. This knowledge can aid in identification and intervention efforts for both autistic and non-autistic children with sensory differences.
Previous literature has documented the associations between sensory differences and social communication and daily living skills (Feldman et al., 2020; Liss et al., 2006; Watson et al., 2011; Williams et al., 2018), motor skills (Jasmin et al., 2009; Surgent et al., 2021; Tomchek et al., 2015), emotional-behavioral problems (Baker et al., 2008; Dellapiazza et al., 2020; Green et al., 2012), and daily activity participation (Hochhauser & Engel-Yeger, 2010; Little et al., 2015; Reynolds et al., 2011) across autistic and non-autistic populations. However, the findings were mixed due to the methodological differences in study designs, purposes, measures, and participant characteristics across studies. For instance, while previous research has generally indicated a negative association between sensory differences and adaptive functioning (Feldman et al., 2020; Liss et al., 2006), other studies have reported null findings (McCormick et al., 2016; O’Donnell et al., 2012) or differential associations for specific subdomains or subgroups (Dellapiazza et al., 2020; Kirby et al., 2019; Tomchek et al., 2015; Watson et al., 2011; Williams et al., 2018). The varied findings may be attributed to the heterogeneous manifestations of sensory differences across the neurodevelopmental spectrum, coupled with their potential variations over time or across contexts. Previous studies may have been limited in addressing these complexities when relying on observed total scores without considering potential multidimensionality and measurement errors for capturing sensory patterns, alongside conventional analytical methods that may not adequately address individual variability (Uljarević et al., 2017).
Furthermore, it is worth noting that the existing evidence on sensory patterns is largely based on cross-sectional data from age-heterogeneous groups, which limits the ability to draw developmentally relevant implications. Longitudinal evidence is essential to support the potential cascading impacts of sensory patterns on later developmental outcomes (Baranek et al., 2018; Thye et al., 2018) as demonstrated by emerging evidence from prospective infant studies (Grzadzinski et al., 2020; Worthley et al., 2023). For instance, a toddler who exhibits hyperresponsiveness to certain sensory experiences may miss out on opportunities to explore their environment, learn new skills, or interact with others. This, in turn, could lead to difficulties in higher-order functioning later in life. Longitudinal evidence demonstrating these cascading effects is clinically significant, as it can inform early intervention strategies, including tailored environmental supports to optimize long-term behavioral outcomes for children with sensory differences (Baranek et al., 2018; Uljarević et al., 2017). Furthermore, the cascading impacts of sensory patterns on more distal or higher-level functional outcomes, such as daily activity participation, remain understudied and thus necessitate further investigation.
To address these empirical and methodological gaps, we applied structural equation modeling approaches, including latent growth curve modeling and path analysis, to investigate the multivariate associations between early development of sensory patterns and school-age adaptive/maladaptive and participation outcomes in a prospective birth cohort. Additionally, we sought to compare the impacts of sensory development in children with and without an autism condition to assess the relative significance of early sensory patterns on school-age outcome, including adaptive, maladaptive, and participation outcomes. Our hypothesis was that certain sensory patterns, characterized by higher initial levels and larger increases throughout early childhood, would be differentially associated with poorer school-age outcomes. We also hypothesized that the developmental trajectories of sensory patterns (hereafter “sensory trajectories”) would explain a greater amount of variance in school-age outcomes for autistic children compared to their non-autistic peers.
Methods
Participants and Procedure
This study involved a prospective birth cohort of 1,517 children born in 2013 recruited from the North Carolina birth registry. Families of Hispanic/Latino ethnicity were excluded from recruitment because the FYIv3.1 had not been translated into Spanish at the time of the study (see Chen et al., 2022b, 2024 for study details). The caregivers provided consent for their children to participate and were followed across three timepoints to report their child’s development on various domains of behavior using paper forms and/or online questionnaires when the child was aged 6–19 months (Time 1; T1), 3–4 years (Time 2; T2), and 6–7 years (Time 3; T3). Sensory patterns were assessed with the First Years Inventory version 3.1 (FYIv3.1; Baranek et al., 2013) at T1, and Sensory Experiences Questionnaire version 2.1 (SEQv2.1; Baranek et al., 1999) at T2 and T3-Phase 1. During the second phase of T3, approximately 5 months after the Phase-1 responses were collected, a subset of families (N = 465) was invited via email invitations to complete school-age outcome measures, including Vineland Adaptive Behavior Scales, Third Edition (VABS-3; Sparrow et al., 2016) and Participation and Environment Measure-Children and Youth (PEM-CY; Coster et al., 2010). This subset included families (N = 359) who reported any diagnosis/concerns via the (DCQv1.5; Reznick et al., 2005) and elevated autistic traits via the Social Responsiveness Scale, Second Edition (SRS-2; Constantino & Gruber, 2012). Additionally, a random sample of families whose responses did not indicate concerns at any previous time points was included (N = 106). A total of 389 responses were received across all the timepoints, with 312 (80%) of them reporting the presence of a developmental diagnosis and/or concerns at T2 or T3.
For the current study, the children with complete T3 outcome data (subsample; N = 389) were classified into either the autistic group (N = 88; reported by parents to have an autism diagnosis from clinicians via the DCQ and/or met the SRS-2 total T-score ≥ 60 cutoff at T2 or T3), or non-autistic group (N = 301; not meeting the autistic group criteria). Table 1 shows the demographic and clinical characteristics of the full sample (N = 1,517; with complete data of sensory measures) and the subsample (N = 389; with school-age outcome data) by autistic and non-autistic groups.
Measures
Sensory Patterns
Children's sensory patterns were assessed using two parent-report measures, both utilizing a 5-point Likert scale: the FYIv3.1, an early screener for identifying infants aged 6–16 months at elevated likelihood for a later diagnosis of autism (Baranek et al., 2013) and the SEQv2.1, a questionnaire for measuring the behavioral responses to daily sensory experiences for children ages 9 months through 12 years (Baranek et al., 1999). The FYIv3.1 has shown appropriate structural validity (Baranek et al., 2022) and has been applied in several studies involving community samples and high-risk samples (e.g., Meera et al., 2020; Turner-Brown et al., 2013). The SEQv2.1 has demonstrated appropriate structural validity (Lee et al., 2022), excellent internal consistency (alpha = 0.80) and test–retest reliability (ICC = 0.92) (Little et al., 2011), and has shown utility in differentiating autistic children from those with typical development or other developmental conditions (Baranek et al., 2006). It has been widely used in previous research on sensory differences in autism (e.g., Boyd et al., 2010; Wolff et al., 2019).
In the current study, comparable item-response-theory-based scores across measures and timepoints were computed using a common set of parent-reported items across the two measures for longitudinal analysis, with higher scores indicating more elevated sensory patterns (for details, see Appendix in the supplementary materials).
Clinical Outcome Classification
As described in the Participants and Procedure section, the DCQv1.5 and SRS-2 were used to classify participants into autistic and non-autistic groups. The DCQv1.5 is a parent-report measure with open-ended questions about whether a caregiver or professional (e.g., psychiatrists, pediatricians, or psychologists) had been concerned about the child’s development and whether the child has received any clinical diagnoses (Reznick et al., 2005). The DCQv1.5 has demonstrated utility in previous research on community samples for clinical outcome ascertainment (Chen et al., 2022b, 2024; Turner-Brown et al., 2013). The SRS-2 is a widely-used parent-report measure of autistic traits with established general-population norms (Constantino & Gruber, 2012). A total T-score (M = 50, SD = 10) ≥ 60 suggests clinically significant social difficulties and elevated likelihood of an autism diagnosis. Participants were classified into the autistic group if they were reported to have an autism diagnosis through the DCQ and/or those who met the SRS-2 T-score cutoff at T2 (3–4 years) or T3 (6–7 years).
Adaptive and Maladaptive Outcomes
The VABS-3 is a widely used standardized measure of adaptive functioning from birth to age 90. The domain-level parent/caregiver form was used to assess children’s adaptive skills, motor skills, and maladaptive behavior (two subscales: internalizing and externalizing behaviors). The standardized scores (M = 100, SD = 15 for the adaptive behavior composite and motor skills and M = 15, SD = 3 for maladaptive behavior subscales) were used for the current analysis.
Activity Participation Outcomes
The PEM-CY is a parent-report questionnaire designed to assess participation in 25 types of daily activities across three settings: home, school, and community. Caregivers reported on the child’s participation frequency (0 = never to 7 = daily) and extent of involvement (1 = minimally involved to 5 = very involved) for each activity. The internal consistency of the frequency scales ranged from insufficient to acceptable (α = 0.59-0.70), while the involvement scales showed acceptable to good consistency (α = 0.72-0.83) (Coster et al., 2011).
To capture both the frequency and level of involvement in operationalizing participation outcomes for the current study, a new variable was created by multiplying the item-level responses from the frequency and involvement scales, resulting in scores ranging from 0 to 35. These new scores served as indicators for common factor analysis, which was conducted using maximum-likelihood estimation and varimax factor rotation to determine the internal factor structures for each of the home, school, and community settings. The number of factors was determined using multiple criteria, such as scree plots with parallel analysis (eigenvalues > simulated values), relative fit indices (Tucker-Lewis Index [TLI] > 0.90 and root-mean-square error of approximation [RMSEA] < 0.06), and theoretical consistency.
As shown in Figure S1, three factors were extracted for the home setting, two factors for the school setting, and three factors for the community setting. Two community items (“working for pay” and “overnight trips”) were dropped due to limited relevance to the current young sample and low standardized factor loading (< 0.20) across the extracted factors, respectively. Bartlett’s approach was utilized to derive factor scores, which provide unbiased estimates of the true factor scores (Hershberger, 2005). These derived factor scores were then used as the distal outcomes in the primary analysis. Descriptive statistics of these factor scores by clinical outcome groups can be found in Table S1.
Statistical Analyses
To examine the multivariate associations among the observed and latent variables, the current hypothesized model (see Fig. 1) was built upon a multivariate linear latent growth curve model for estimating trajectories of sensory patterns across the three domains (HYPER, HYPO, and SIRS), which has been demonstrated as a good-fitting model in a previous study (χ2(15) = 27.44, CFI = 0.995, TLI = 0.988, RMSEA = 0.023; Chen et al., 2022b, 2024). The adaptive/maladaptive outcome variables were regressed onto the latent growth parameters of sensory patterns to assess the direct effects of sensory trajectories. Given the previous evidence that children’s activity participation can be influenced by their functional levels and behavioral challenges (Askari et al., 2015; Taheri et al., 2017), the participation outcomes were further regressed onto the adaptive/maladaptive outcome variables by each setting separately. This allowed for the examination of the direct and indirect effects of sensory trajectories on participation outcomes, while considering children’s level of adaptive functioning and maladaptive behavior. Additionally, three demographic variables (i.e., child’s sex, race/ethnicity, and parental education level) were added as covariates to account for their potential effects on the above-mentioned associations. The intercorrelations of the school-age outcome variables are shown in Table S2.
Hypothesized full structural equation model. The full model included a measurement part (as shown in the dashed square), which is a multivariate linear latent growth curve model for sensory patterns with factor loadings on the latent growth parameters (i.e., latent intercept and slope) and covariances among them. Additionally, the structural parts consist of regression paths estimating the associations between latent growth parameters and other observed variables (demographic covariates, VABS-3 and PEM-CY variables). Note INT intercept, SLP slope, HYPER hyperresponsiveness, HYPO hyporesponsiveness, SIRS sensory repetitions/seeking behavior. *The model was fitted for each of the three PEM-CY settings: home (3 factors: routines/duties, screen-based activities, non-screen-based activities), school (2 factors: classroom-based and extracurricular activities), and community (3 factors: daily outings, unstructured physical activities, structured group activities)
Further, an iterative approach was employed to assess the relative importance of predictors and explanatory variables for school-age outcomes. As shown in Figure S2, each group of predicting variables was added iteratively, and the change in R-squared (ΔR2) was evaluated to determine the additional variances explained by each predictive variable group across autistic and non-autistic groups using multigroup analysis. This allowed us to examine whether certain groups of predictors, such as sensory trajectories, accounted for more unique variances in participation outcomes among children classified as autistic compared to non-autistic. The structural equation modeling analyses (including latent growth curve modeling) were conducted with full-information maximum-likelihood estimation for handling missingness in Mplus 8.4 (Muthén & Muthén, 2018).
Results
The model fit statistics indicated good fits of the full models (CFI = 0.988 to 0.989, TLI = 0.958 to 0.960, RMSEA = 0.024 to 0.025; Table S3). The effects of sensory trajectories on adaptive/maladaptive outcomes controlling for demographic variables were presented in Table S4, with significant results visualized in Fig. 2. The greater slope (i.e., steeper increase) of HYPER predicted lower adaptive and motor skills (both β = -0.28, SE = 0.08, p = 0.001), as well as higher levels of internalizing behavior (β = 0.43, SE = 0.07, p < 0.001) and externalizing behavior (β = 0.15, SE = 0.07, p = 0.041) by school age. The higher HYPO at baseline predicted lower adaptive skills (β = -0.43, SE = 0.20, p = 0.034), and its steeper increase predicted more externalizing behavior (β = 0.41, SE = 0.08, p < 0.001). The latent growth parameters of SIRS were not significant predictors of any adaptive/maladaptive outcomes. The total variances of adaptive/maladaptive outcomes as explained by sensory trajectories and demographics ranged from 17.5% to 34.5%.
Differential effects of sensory trajectories on a adaptive and b maladaptive outcomes. Note. The displayed paths are subsets of the full model illustrated in Fig. 1. The values are standardized beta coefficients with corresponding standard errors. *p < .05, **p < .01, ***p < .001
The total effects of the predictors on participation outcomes across settings are reported in Table S5. Controlling for the effects of demographic variables, the steeper increase of HYPER indirectly predicted lower participation in certain categories of activities through the mediation of certain adaptive/maladaptive outcomes. As shown in Fig. 3, the effects of the slope of HYPER on participation in routines/duties and classroom-based activities were mediated by adaptive skills (β = -0.12 & -0.14, both SE = 0.05, p = 0.016 & 0.021), while its effects on unstructured physical activities were mediated by motor skills (β = -0.08, SE = 0.03, p = 0.018) and internalizing behavior (β = -0.06, SE = 0.03, p = 0.036). In other words, the steeper increase of HYPER was associated with lower adaptive and motor skills, which in turn respectively predicted lower participation outcomes in the aforementioned areas. Additionally, the steeper increase of HYPO was found to directly predict lower participation in classroom-based activities (β = -0.26, SE = 0.12, p = 0.033), without being mediated by adaptive or maladaptive behavior. The growth parameters of SIRS were not significant predictors of any participation outcomes. The total variances of participation outcomes as explained by all the predictors ranged from 6.5% to 36.1% across activity categories.
Differential effects of sensory trajectories on participation outcomes: a Indirect effect of sensory hyperresponsiveness on participation in routine/duty activities at home; b Indirect and direct effects of sensory hyperresponsiveness and hyporesponsiveness on participation in classroom activities at school; c Indirect effect of sensory hyperresponsiveness on participation in unstructured physical activities at community. Note. The displayed paths are subsets of the full model illustrated in Fig. 1. The values are standardized beta coefficients with corresponding standard errors. *p < .05, **p < .01, ***p < .001
The multigroup models revealed that sensory trajectories explained 10.9–28.9% variances of adaptive/maladaptive outcomes beyond demographics for the autistic group, and 9.7–28.3% variances for the non-autistic group (see Fig. 4a). Specifically, sensory trajectories explained substantial portions of variances in adaptive skills (24.8%), internalizing behavior (28.9%), and externalizing behavior (18.2%) for the autistic group, and in externalizing (28.3%) and internalizing behavior (23.1%) for the non-autistic group. As for participation outcomes, all the predictors accounted for 11.1–47.9% variances of participation across activity categories for the autistic group, and 5.2–30.1% variances for the non-autistic group (see Fig. 4b). Specifically, sensory trajectories accounted for an additional 1.2–14.6% of the explained variances in participation outcomes above and beyond other predictors for the autistic group, and 2.2–8.5% for the non-autistic group. For children in the autistic group, sensory trajectories contributed to more than 10% of the explained variances in participation in classroom-based activities (14.6%), structured group activities in the community (10.8%), and non-screen-based leisure activities (10.3%).
Discussion
This prospective study represents the first comprehensive, multivariate investigation into the developmental impacts of sensory patterns, including sensory hyperresponsiveness, hyporesponsiveness, and sensory repetitions/seeking behavior, on school-age adaptive, maladaptive, and participation outcomes in a birth cohort sample of autistic and non-autistic children. Our findings demonstrated that the early development of sensory patterns, particularly hyperresponsiveness and hyporesponsiveness, are differentially associated with specific outcome domains. The multigroup analysis further revealed the relative importance of early sensory development for predicting autistic children’s adaptive functioning and participation in daily life settings with higher functional and environmental demands. Below, we delve into a detailed discussion of the differential effects of sensory trajectories on the respective school-age outcome domains.
Impacts of Sensory Trajectories on Adaptive Outcomes
Previous longitudinal studies, although few in number, have shown that early sensory differences may be negatively associated with later social communication (Grzadzinski et al., 2020; Worthley et al., 2023), daily living (Williams et al., 2018; Worthley et al., 2023), and motor skills (Worthley et al., 2023) for autistic children and infants at elevated likelihood for autism. However, these studies were limited in addressing how change in sensory patterns was associated with later outcomes. Through modeling within-person trajectories of sensory patterns, our current study reveals that elevated sensory hyporesponsiveness at baseline (i.e., infancy), coupled with intensifying sensory hyperresponsiveness during the preschool period, may cascade into later difficulties in social-adaptive and motor functioning. Notably, such cascading effects on school-age adaptive functioning appeared to be more pronounced among autistic children compared to non-autistic children. These findings support the cascading theory of sensory patterns on social development (Baranek et al., 2018; Thye et al., 2018) and highlight the importance of early detection and intervention in addressing sensory needs of young children with elevated hyperresponsive and hyporesponsive patterns in response to the sensory environment. By recognizing the intricate interplay of these sensory patterns and their changes over time, it may be possible to mitigate the potential negative impacts of sensory differences on children’s acquisition of adaptive skills through the provision of tailored interventions and supports for children’s sensory needs early in life (Chen et al., 2022a, 2022b; Watson et al., 2017).
Impacts of Sensory Trajectories on Maladaptive Outcomes
The link between sensory hyperresponsiveness and internalizing behavior, such as anxiety, has been well supported by both behavioral and neurological evidence (Ben-Sasson et al., 2009; Carpenter et al., 2019; Green & Ben-Sasson, 2010; Green et al., 2012). Our findings align with the literature by demonstrating the specific contribution of sensory hyperresponsiveness to internalizing behavior, as a larger increase in hyperresponsiveness over time predicted higher levels of internalizing behavior at school age. Interestingly, while increasing hyperresponsiveness was also associated with externalizing behavior, increasing hyporesponsiveness emerged as a more significant predictor of externalizing behavior. The association between sensory patterns and externalizing behavior, as opposed to internalizing behavior, has received less attention in literature. Previous physiological evidence underscores a possible association between under-arousal and externalizing behavior in autistic children (Baker et al., 2018), suggesting a potential underlying mechanism warranting investigation in future research. The current finding adds behavioral evidence by demonstrating the differential roles of sensory hyperresponsiveness and hyporesponsiveness to later maladaptive behavior. Moreover, our multigroup analysis revealed that sensory trajectories accounted for a significant portion of variance in maladaptive outcomes for both autistic and non-autistic children. These findings suggest that early sensory differences could serve as a potential intervention target to mitigate the risk of cascading into maladaptive behavior and promote positive socio-emotional development across the neurodevelopmental spectrum. Moreover, it is important that clinical practitioners consider specific behavioral domains when evaluating developmental progress or the effectiveness of interventions (Chen et al., 2022a; Talbott & Miller, 2020).
Impacts of Sensory Trajectories on Participation Outcomes Across Settings
Compared to adaptive/maladaptive outcome domains, sensory trajectories accounted for a smaller portion of variance in participation outcomes across settings, with some of their effects mediated by adaptive functioning or maladaptive behavior. This observation aligns with expectations, considering participation is viewed as a more distal functional outcome. As shown in Fig. 3b, a larger increase in hyporesponsiveness was found directly associated with lower classroom participation. This longitudinal evidence adds to the prior cross-sectional finding of a concurrent association between hyporesponsiveness and academic performance (Ashburner et al., 2008). Further, a greater increase in hyperresponsiveness was indirectly associated with lower participation in routine activities (e.g., personal care, doing homework) at home, classroom activities, and unstructured physical activities (e.g., playing sports, hanging out with peers) in the community. These results build on the previous longitudinal evidence that higher sensory hyperresponsiveness is associated with lower participation in routine activities at home and community activities among autistic children (Little et al., 2015). This suggests that the impact of sensory patterns on participation may be more pronounced in settings with greater functional and environmental demands, such as in the classroom and community. Thus, children with sensory differences may require additional support in these settings.
The observed mediating role of adaptive and motor skills between sensory development and participation outcomes may be explained by early-life sensory challenges imposing constraints on families, which lead to avoidance of certain stress-inducing learning opportunities, thereby restricting skill acquirement and adaptive growth. Over time, such constraints may further influence broader aspects of daily-life participation. Regarding the mediation of maladaptive behavior, we only observed internalizing behavior, along with motor skills, as a significant mediator between the change rate of hyperresponsiveness and participation in unstructured physical activities. Anxiety related to sensorimotor differences can intensify in unstructured settings with less predictability, leading to avoidance and reduced participation in autistic and non-autistic populations (Ambrose et al., 2022; Arnell et al., 2020; Cairney et al., 2013). These findings thus highlight the importance of considering individual children’s sensory and developmental profiles when implementing environmental adaptations or sensory-based support strategies to facilitate children’s participation in various daily life settings (Pfeiffer et al., 2017).
Importantly, sensory trajectories overall accounted for a larger proportion of variance in participation outcomes for autistic children than for non-autistic children, particularly in non-screen-based leisure activities, classroom or extracurricular activities, and community group activities. This suggests that sensory differences may have a greater impact on the participation of autistic children in these specific activity areas compared to their non-autistic peers, thus underscoring the importance of addressing sensory needs through targeted interventions and support to promote inclusive participation for autistic children in these settings.
Finally, we found no significant association between sensory repetitions/seeking behavior and any of the school outcome domains. Previous literature has shown mixed evidence for associations between sensory repetitions/seeking behaviors and specific types of adaptive or participation outcomes (Hochhauser & Engel-Yeger, 2010; Kirby et al., 2019; Little et al., 2015; Watson et al., 2011; Williams et al., 2018). For instance, previous longitudinal evidence suggested negative associations between sensory repetitions/seeking behavior and adaptive functioning as well as community participation in autistic children, contrasting with positive associations observed in children with developmental delay (Kirby et al., 2019; Williams et al., 2018). It is possible that sensory repetitions/seeking behavior may serve as self-regulation strategies or motivators for children to engage in shared family activities and routines (Bagby et al., 2012; Hochhauser & Engel-Yeger, 2010), which could have positive effects on their functional outcomes and participation. Nevertheless, this sensory pattern may present challenges in certain contexts, such as distracting children from effectively following commands or completing required tasks in structured learning environments, thereby negatively impacting their functional performance (Jones et al., 2020). Additional factors that may be attributed to the mixed findings include children’s cognitive levels, parental perceptions or expectations, and parental stress related to sensory-seeking behavior and their functional impacts in various contexts (Kirby et al., 2015, 2019; Piccardi & Gliga, 2022; Williams et al., 2018). Further research that considers these child, parental, and environmental characteristics is warranted to comprehensively understand the positive and negative impacts of sensory repetitions/seeking behavior on child functioning.
Limitations and Future Directions
Despite these novel longitudinal findings, some caveats need to be considered. This large cohort study necessarily relied on parent-reported measures of sensory patterns, developmental, and clinical outcomes. While we were restricted in our capacity to validate parent-reported diagnoses with gold-standard tests, prior population-based studies have supported the utility of parent-reported outcomes in clinical classification (Kogan et al., 2018; Warnell et al., 2015). Further, previous studies have demonstrated that the results may vary depending on whether the sensory patterns were assessed through parent-reported measures or clinician-observational measures (Grzadzinski et al., 2020; Williams et al., 2018). Therefore, the current findings must be interpreted in light of these limitations. Future research should also consider adopting a multi-informant multi-method approach including observational measures to obtain a more comprehensive understanding of the impacts of sensory patterns on other behavioral domains. Moreover, because participation is a complex construct shaped by a multitude of factors, future research should consider including other variables, such as school/community characteristics, environmental support or barriers, children’s preferences, peer interactions, and caregivers’ expectations, to understand their interplay with sensory patterns and participation outcomes, and how tailored supports for sensory needs may mitigate the cascade of sensory patterns on children’s functional development.
Data Availability
The research data from the NCCDS-2 study are not publicly accessible as the participants did not provide consent for its release to a national repository. Inquiries regarding de-identified data supporting the findings of the current study may be directed to the principal investigator (Dr. Grace T. Baranek) routed through the corresponding author.
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Acknowledgements
The authors would like to thank the families for their ongoing participation in this longitudinal study and the dedicated staff involved in data collection and coding through the Program for Early Autism Research, Leadership, and Service (PEARLS). Our gratitude also extends to the members of the Innovations in Neurodevelopmental Sensory Processing Research (insp!re) lab at USC Chan for their invaluable feedback. Furthermore, we remember with gratitude our late colleague, Dr. J. Steven Reznick, whose leadership, friendship, and support were invaluable during the initial stages of this research.
Funding
Open access funding provided by SCELC, Statewide California Electronic Library Consortium. The NCCDS project received support from the Autism Speaks Foundation (Grant #5946) and the Ireland Family Foundation. The school-age follow-up was a part of YJC’s doctoral dissertation at the University of Southern California, partially funded by the Organization for Autism Research Graduate Research Grant (#2019G3).
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YJC, JS, and GTB have contributed to conceptualization and methodology of the current study. GTB, LRW, and ERC are the principal investigators of the project, responsible for conceptualizing the early stages of the project and measures, securing research funds as well as overseeing the project implementation and dissemination efforts. YJC conducted formal analyses and drafted the manuscript. All other authors provided critical revision of the work for intellectual content.
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GTB is the lead author of two measures used in the current study, the First Years Inventory and Sensory Experiences Questionnaire. ERC and LRW are co-authors of the First Years Inventory. There are no financial conflicts with the use of these measures as they are freely available and none of the authors collect any royalties. YJC and JS have declared no conflict of interest in relation to this study.
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The study procedure was approved by the University of North Carolina at Chapel Hill (IRB #13-2648) and University of Southern California Institutional Review Boards (IRB #HS-19-00651).
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Chen, YJ., Sideris, J., Watson, L.R. et al. Developmental Impacts of Early Sensory Patterns on School-Age Adaptive, Maladaptive, and Participation Outcomes in Autistic and Non-autistic Children. J Autism Dev Disord (2024). https://doi.org/10.1007/s10803-024-06494-0
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DOI: https://doi.org/10.1007/s10803-024-06494-0