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Revista mexicana de neurociencia

versión On-line ISSN 2604-6180versión impresa ISSN 1665-5044

Rev. mex. neurocienc. vol.20 no.5 Ciudad de México sep./oct. 2019  Epub 22-Mar-2022

https://doi.org/10.24875/rmn.m19000019 

Original articles

Sensory profile in children with autism disorder and children with typical development

Rebeca A. Pérez-Fonseca1 

Germán E. Burguillos-Torres1 

Victoria G. Castillo-Velásquez1 

Natalia Moreno-Zuleta1 

Rosa I. Fonseca-Angulo1 

Cesar Blumtritt1 

Rafael García-Jiménez2 

1Research Group, Foundart Academy, Colombia/Miami. Miami, Florida, United States

2Research Department, Simon Bolívar University. Barranquilla, Colombia


Abstract

Objective:

The objective of the study was to compare the sensory profile characteristics of the children with autism spectrum disorder (ASD) and children with typical development (TD) within the ages of 3 and 12 years who attended the rehabilitation center in Barranquilla and Valledupar Colombia.

Methods:

A study of descriptive type correlation of the sensory profile was conducting using the Short Sensory Profile 2 by Winnie Dunn on boys and girls with an ASD diagnosis and children with a TD.

Results:

A total of 59 test subjects were included in the study comprised 39 children on the ASD (5 girls and 36 boys) and 28 children with a TD (11 girls and 17 boys). The medium age was 6.97 for the ASD group and 6.61 for the TD group. There are differences in each of the patterns of pre-processing and sensory systems analyzed in children on the ASD and TD (p < 0.05) except at the visual system processing level (p > 0.05).

Conclusions:

The study indicates that there is a significant difference in between the ASD group and the TD group, these differences indicate that the population with ASD presents higher level in regard to sensory processing patterns in comparison to TD in accordance to each category in the Short Sensory Profile 2 by Winnie Dunn.

Key words Sensory profile; Autism spectrum child; Neurotypical; Child

Introduction

The American Psychiatric Association with acronyms APA1 published in 2013, the Diagnostic Manual of Mental Disorders DSM-5 where the Asperger, unspecified developmental disorders, and autism were united in a single diagnostic criterion called autism spectrum disorder (ASD). In this neurodevelopmental disorder, there is a deficit in communication, socialization and the interaction of multiple contexts, as well as restrictive, repetitive patterns of behavior, and restrictions of interest or activities2. The prevalence of ASD worldwide is approximately 1-6 per thousand individuals. In the United States, it is one to every 59 individuals. In Colombia, there are no exact data at present3.

Approximately, between 45% and 96% of children with ASD4 and 11 and 16% of children with typical development (TD) have sensory processing deficits5, however, in Latin American children, it is between 18 and 31%6. This type of alterations was initially defined by Ayres as a sensory integration disorder that consists of an alteration of the functioning of the nervous system due to the fact that the information received through the different senses is not processed adequately and efficiently7,8. Giving some kind of sensory integrative dysfunction such as motor restlessness, inadequate coordination, problems of visual perception, and difficulties in following the rhythm of work in class and others9,10.

Subsequently, Miller et al.11 proposed the term sensory processing disorder, referring to those individuals who experienced difficulties in the participation of activities of daily life, as a result of alterations in sensory processing. This proposal is divided into three categories: sensory modulation disorder, sensory-based motor disorder, and sensory discrimination disorder. In 1997, Dunn12 proposes a new approach in which she poses four patterns of sensory processing that arise from the interaction between the types of thresholds (high or low) and the type of response (agree or against).

Within the patterns of sensory integration is the pattern of low registration, corresponding to the responses of high neurological threshold and a tendency to act passively. That is, the individual within this pattern fails to perceive the same intensity of information of the environment and does not seem any need to satisfy his response (passive). One example of these behaviors is not realize that his face or hands are dirty, leave clothes twisted after going to the bathroom or difficulty to determine the amount of force they should use when doing sports or during fine motor activities12,13.

In the search pattern, there are responses against the high neurological threshold, children with this type of pattern require a great intensity of sensory information, which they do not receive from the daily stimuli of their environment, leading them to acquire an active role to counteract its threshold13,14. The behaviors of a child with a search pattern correspond precisely to those of a child who presents search for sensations, an example of these behaviors are: the continuous search for movements, seems to be unaware of the danger; constantly looking for or making noise, squeezing objects, touching or embracing others excessively and taking inedible objects to the mouth14.

Regarding the sensitivity pattern, children are able to perceive sensations despite the fact that they involve a small amount or intensity of information, becoming simply a kind of “radar” when detecting information, but they do not acquire an active role to counteract its threshold, an example that clearly describes this pattern is the distraction that occurs in noisy environments13,14. Finally, there is the sensory seeker, this pattern is characterized by presenting a high sensory threshold but employs strategies of active self-regulation, that is, individuals seek and crave sensory stimulation in an unusual way, showing an insatiable desire to increase the intensity of the stimulus13,14.

According to the model proposed by Winnie Dunn, this allowed him to design the sensorial profile questionnaire; the internal consistency level of the instrument is 0.97 Cronbach’s Alpha and presents versions in English, Spanish, and Chinese. The application time of the instrument is approximately 45 min; this questionnaire must be applied by the occupational therapists to the caregivers and nurses of the children or on the contrary observations are made by the professional in charge so that it can be completed15.

Previous studies have reported that there are multiple mechanisms through which sensory disturbances at an early age in children with ASD enter a cascade of social deficits that affect functionality in this type of population. In the United States, they have identified that 95% of children with ASD present some degree of diffusion in sensory processing, specifically altered sensory systems are often auditory, visual, and tactile16,17. Studies conducted in children with TD have reported a prevalence of sensory processing disorders between 14.3 and 28.6%, which affected their school activities and activities of daily living18.

The one developed by Mailloux and Miller-Kuhaneck19 is one of the few studies that have made comparisons of the sensory profile; those that compared the characteristics of sensory processing among a group of children living in the United States (between 5 and 8 years of age) with and without ASD. In this study, 84 children and their parents participated; the results show that both groups behave differently in all the subscales that evaluate the sensory processing, in the case of the group with ASD, the behaviors they present are significantly related to the degree of severity in the symptoms of autism.

The authors agree that the sensory profile evaluations allow a better understanding of the sensory deficit and thus provide the possibility of generating therapeutic measures according to the needs of each individual, due to the heterogeneous characteristics that occur in each child with ASD and DT19,20. So far, most of the research conducted in this area has been in the United States and Europe; however, there is a low level of scientific evidence in South America about the variety of sensory responses that can be presented in the groups to be studied21. Despite the high impact that this type of alterations generates on the functional performance of children with ASD and DT, no comparative studies have been reported in Latin America. Obtaining this type of data is essential to identify the differences and similarities that may occur in both groups, in this sense those factors influence the timely detection of sensory alterations, which generate a negative impact on the performance of school activities and of daily life in both groups. Therefore, it is considered necessary to analyze the impact of this type of deficit in age groups or development status because it directly affects an effective intervention. The main objective of this study was to determine and compare the sensory profile in a sample of children between 3 and 12 with ASD and TD through the Sensory Profile of Winnie Dunn.

Methods

A transversal descriptive study of correlation type was carried out where 59 participants were selected through a non-probabilistic sampling for convenience, in this case, 28 children with TD and 31 children with ASD met the following inclusion criteria; boys and girls between the ages of 3 and 12 years, with diagnosis confirmed by a neuropediatric of ASD, in the case of children with TD they should not have presented any warning sign during their psychomotor development; for both groups of participants the parents had to sign the informed consent.

Materials

To fulfill the objective of the research, the sensory profile of Winnie Dunn Spanish version was applied to 59 participants, this questionnaire is divided into three sections that evaluate; the sensory system (visual, auditory, oral, proprioceptive, and vestibular) together with the sensory patterns (Search, avoidance, low register, and sensitivity) and behavior (behavior, attention, and social emotions). It contains 125 questions related to the sensory aspect and has as options of answers: almost always (5), frequently (4), half of the time (3), occasionally (2), almost never (1), and not applicable (0), for the qualification, the sum of the answers to each question was made according to the evaluated item, later this score is compared with the scales that go according to each item and that in this case indicates the categories that the child is in; less than other/much less than others, just like the majority of other and much more than/more than other, each of the above presented an interpretation that indicated the sensory characteristics presented by children with ASD and DT evaluated (Table 1).

Table 1 Interpretation of results from the Winnie Dunn categories. 

Sensory processing patterns Less than other/much less than others Just like the majority of others More than others/much more than others
Seeking May not look for enough sensory information to sustain successful participation Use sensory stimuli to gather the information necessary for their participation Can search for sensory information so excessively or disruptively that it interferes with participation
Avoiding The detection of the sensory stimulus necessary for participation may fail Handles sensory information to get only the amount needed for participation Can become so overwhelmed by sensory information that it interferes with participation
Sensitivity May not detect the sensory input particularly necessary to sustain participation Detects the sensory input that allows participation Maybe so distracted by sensory information that it interferes with participation
Registration Can observe sensory stimuli that are not useful for participation Observes enough sensory stimuli that allow participation May lose the sensory information necessary for participation

Reference source: sensory profile Winnie Dunn

Process

The researchers conducted a review of the literature based mainly on the theory described by the Occupational Therapists Jean Ayres and Winnie Dunn, analyzing the sensory behaviors within the areas of action in which individuals develop sensory level.

Subsequently, the evaluators went to the educational institutions and rehabilitation centers located between the cities of Barranquilla and Valledupar, where the risks, procedures, and benefits of the investigation were shared with parents, managers, therapists, caregivers, and teachers. The informed consent form was given to the parents who accepted their children’s participation in the study. Data collection by occupational therapists was carried out during the months of June and July of 2018, through the technique of direct observation and interviews with parents, the evaluators were trained to perform the registration of the Winnie Dunn format. In addition, the professionals in charge of the evaluation have 6 years of experience in the assessment and intervention of this population.

As part of the evaluations carried out, each therapist performed the respective screening according to the sensory behaviors reported in the instrument; finally, the information collected was entered into a database designed in Excel version 2010 and was later exported to the statistical software SPSS version 20.

Statistic analysis

According to the information collected, an analysis of the proportional distribution of the following variables was carried out; sociodemographic characteristics, sensory processing patterns, processing, and behavior system; later to identify whether the variables of the sensory profile were parametric or non-parametric, the Kolmogorov–Smirnov statistical test was applied in both groups (DT-TEA); finally, to establish the differences and similarities of both groups about the sensory profiles, the student’s t-test for independent samples was applied, accepting a significant value of p < 0.05.

Results

At the level of sociodemographic characteristics, the following was observed; there is a greater number of male participants in both the ASD group and DT group, 64.5% of the ASD group and 100% of the group with TD are in school, the average age of the ASD participant is 6.97 ± 2.93 and in children with TD was 6.61 ± 3.29 (Table 2).

Table 2 Sociodemographic characteristics of the groups studied. 

Sociodemographic characteristics Frequency (%)
ASD DT
Gender
Female 5 (16.1) 11 (39.3)
Male 26 (83.9) 17 (60.7)
Schooled
Yes 20 (64.5) 28 (100)
No 11 (35.5) 0

Reference source: sensory profile Winnie Dunn. ASD: autism spectrum disorder; DT: typical development

Regarding the patterns of sensory processing evaluated through the sensory profile of Winnie Dunn, in the search pattern, it was observed that 45.2% of the group with ASD is within the response category more than other/much more than other. It means that children with ASD can search for sensory information so much that it interferes with participation, while 64.3% of the group with DT is in the category just like majority than others, which means that they use various sensory stimuli to gather the information necessary for active participation (Table 3).

Table 3 Mean difference in sensory processing patterns 

Patterns of sensory processing Groups Media (SD) Differences of medias p
Seeking ASD 42.290 ± 19.03 13.32 0.00*
DT 28.964 ± 4.41
Avoiding ASD 48.77 ± 16.71 19.45 0.00*
DT 29.321 ± 14.48
Sensitivity ASD 45.806 ± 15.21 17.09 0.00*
DT 28.714 ± 9.24
Observation ASD 41.774 ± 18.62 17.27 0.00*
DT 24.500 ± 8.87
Auditory ASD 19.387 ± 6.95 5.78 0.00*
DT 13.607 ± 6.78
Visual ASD 10.25 ± 6.11 1.4 0.31
DT 8.857 ± 4.24
Touch ASD 22.419 ± 9.99 6.91 0.00*
DT 15.500 ± 7.54
Movement ASD 17.613 ± 8.88 6.75 0.00*
DT 10.857 ± 5.83
Body position ASD 12.516 ± 9.09 5.69 0.00*
DT 6.812 ± 5.60
Oral ASD 20.065 ± 9.68 5.38 0.02*
DT 14.679 ± 8.16
Behavioral ASD 22.387 ± 9.14 7.99 0.00*
DT 14.393 ± 6.59
Socialemotional ASD 34.613 ± 14.7 13.68 0.00*
DT 20.929 ± 13.85
Attention ASD 29.903 ± 10.39 14.54 0.00*
DT 15.357 ± 7.09

Reference source: sensory profile de Winnie Dunn.

*p < 0.05 Significant differences. ASD: autism spectrum disorder; DT: typical development; SD: standard deviation.

Regarding the pattern of avoidance, it is confirmed that 54.8% of children with ASD are within the score more than other/much more than other, which indicates that they can be overwhelmed with sensory information to such an extent that interferes with their participation. As for children with TD, 60, 7% are in the category of just like the majority of others (Table 3).

In the sensitivity pattern within the obtained results it was evidenced that 64.5% of the group with ASD are within the score more than other/much more than other which indicates that they can be distracted with both the non-organized sensory information. On the other hand, 89.3% of the children with DT are in the “just like the majority of others” category, that is, they detect the sensory stimuli that allow their participation.

In the registration pattern, both the group with ASD and that of DT were rated within the category just like the majority of others, it means, they perceive the amount of stimuli sufficient for correct participation. The results and the comparisons revealed that there are significant differences between the group with ASD and the group with DT (p = 0.00) (Table 3). In each of the evaluated patterns, the TEA group shows a trend of higher values (41.77 ± 18.72) compared to the measurement of the DT group (24.500 ± 8.87) (Table 4).

Table 4 Percentage distribution of the processing patterns of the groups studied 

Patterns of sensory processing Frequency (%)
ASD DT
Seeking
More than other/much more than other 14 (45.2) 3 (10.7)
Less than other/much less than other 4 (12.9) 7 (25)
Just like the majority than others 13 (41.9) 18 (64.3)
Avoiding ]
More than other/much more than other 17 (54.8) 4 (14.3)
Less than other/much less than other 0 7 (25)
Just like the majority than others 14 (45.2) 17 (60.7)
Sensitivity
More than other/much more than other 20 (64.5) 1 (3.6)
Less than other/much less than other 2 (6.5) 2 (7.1)
Just like the majority than others 9 (29) 25 (89.3)
Registration
More than other/much more than other 12 (38.7) 5 (17.9)
Less than other/much less than other 2 (6.5) 0
Just like the majority than others 17 (54.8) 23 (82.1)

Reference source: sensory profile Winnie Dunn. ASD: autism spectrum disorder; DT: typical development.

At the level of auditory sensory processing systems, 74.2% of children with ASD and 64.3% of children with TD are within the response category just like the majority of others, in sensory processing visual 48.4% of the group with ASD and 42.9% of children with TD are in the category just like the majority of others. However, 53.5% of children with TD and 38.7% of ASD are in the less than other/much less than other category, which indicates that they are below the response threshold established by Dunn. In tactile sensory processing, 51.7% of children with ASD are in the more than other/much more than other category, with this high threshold giving rise to determining that there is greater tactile defensibility that bursts into their behavior, whereas the group with DT 67.9% of children is in the category just like the majority than other (Table 5). Otherwise, in both groups, both TEA and DT are in the category just like the majority than other at the level of the vestibular, proprioceptive, and gustatory systems. Regarding the sensory processing systems evaluated through the Winnie Dunn sensory profile, the results and comparisons revealed that there are significant differences between the group with ASD and the group with DT in each of the systems (p = 0.00) except in the visual system (p = 0.31) (Table 6).

Table 5 Percentage distribution of the sensory processing systems of the groups 

Sensorial processing system Frequency (%)
ASD DT
Auditory processing
More than other/much more than other 6 (19.4) 10 (35.7)
Less than other/much less than other 2 (6.5) 0
Just like the majority than other 23 (74.2) 18 (64.3)
Visual processing
More than other/much more than other 4 (12.9) 1 (3.6)
Less than other/much less than other 12 (38.7) 15 (53.5)
Just Like the majority than other 15 (48.4) 12 (42.9)
Touch processing
More than other/much more than other 16 (51.7) 6 (21.4)
Less than other/much less than other 1 (3.2) 3 (10.7)
Just like the majority than other 14 (45.2) 19 (67.9)
Vestibular processing
More than other/much more than other 14 (45.1) 3 (10.7)
Less than other/much less than other 2 (6.4) 5 (17.9)
Just like the majority than other 15 (48.4) 20 (71.4)
Proprioceptive processing
More than other/much more than other 9 (29) 1 (3.6)
Less than other/much less than other 6 (19.4) 8 (28.6)
Just like the majority than other 16 (51.6) 19 (67.9)
Gustatory processing
More than other/much more than other 11 (35.5) 2 (7.1)
Less than other/much less than other 1 (3.2) 4 (14.3)
Just like the majority than other 19 (61.3) 22 (78.6)

Reference source: sensory profile Winnie Dunn. ASD: autism spectrum disorder; DT: typical development.

Table 6 Percentage distribution of behavior of the groups studied 

Behavior Frequency (%)
ASD DT
More than other/much more than other 16 (51.7) 1 (3.6)
Less than other/much less than other 1 (3.2) 5 (17.9)
Just like the majority than other 14 (45.2) 22 (78.6)
Socialemotional relationship
More than other/much more than other 17 (54.8) 5 (17.9)
Less than other/much less than other 1 (3.2) 6 (21.4)
Just like the majority than other 13 (41.9) 17 (60.7)
Attention
More than other/much more than other 21 (67.8) 2 (7.1)
Less than other/much less than other 1 (3.2) 4 (14.3)
Just like the majority than other 9 (29) 22 (78.6)

Reference source: sensory profile Winne Dunn. ASD: autism spectrum disorder; DT: typical development.

Regarding the proportional distribution measures, it was identified that at the behavioral level, 51.7% of children with ASD are in the category more than other/much more than others, this occurs in the same way in the items of attention and socioemotional relationships, giving rise to the responses or sensory challenges directly affect the performance in the activities of daily life, generating behaviors that are misinterpreted as not very adaptive. However, the group with DT is within the response category just like the majority of others, that is, sensory processing systems may not affect the behavior of this population (Table 5). Both groups present significant differences in each of the variables (p = 0.00), the group with ASD has a tendency to score above the mean at the behavioral level (22.387 ± 9.14), socioemotional relationships (34.613 ± 14.7), and attention (29.903 ± 10.39) with respect to the group of children with TD (Table 4).

Discussion

Based on the results obtained in this research, we identified within the sociodemographic characteristics that the majority of the population with ASD evaluated is male, with an average age of 6 years; they are in school and with therapeutic intervention. These data coincide with that reported by the Centers for Disease Control of Atlanta with acronyms CDC3 where it states that one in every 59 children between the ages of 6 and 8 years have been diagnosed with ASD with a 4 times higher tendency in man that in women, likewise, 95% of children diagnosed with ASD resident in the United States have been included in special education programs.

At the level of sensory processing patterns, we observed that both groups behave differently in the patterns of search, avoidance, sensitivity, and observation. The group with ASD presented alterations in the aforementioned patterns compared to the group with DT, which presented a performance according to age and condition in each of them, these results coincide with the reported by Brown et al.22, who in the same way compared a group with ASD and a group with DT and found that there were significant differences in those patterns (p ≤ 0.017), the group with ASD showed alterations in sensory processing. Similar results were reported in the study conducted by Brockevelt, et al.23 In the United States in a sample of 21 children with ASD between the ages of 3 and 9 years, also reported that there are significant differences between the groups with ASD and DT in each of the sensory patterns (p < 0.001). Little et al.24 presented several studies under the same approach, which state that the sensory patterns of the groups studied are different.

Likewise, the group with ASD presented higher scores with respect to the DT group at the level of the patterns and sensory processing system; each of the groups presented significant differences. Those results coincide with the study carried out by Linde et al.25, in the USA that affirms that the scores of the ASD are always superior in each of the patterns of sensory processing with respect to the DT. However, in the study conducted by Brown et al.22 and Brockevelt et al.23 found that the group diagnosed with ASD residing in Australia and another group of children with the same condition residing in the United States had significantly lower scores in comparing the group of children with TD in each of the sensory processing patterns, the sensory patterns were altered in all the groups studied with ASD.

The study conducted by Tomchek and Dunn26 in the USA with a sample of 281 children with and without ASD, partially supports the results obtained, stating that both groups had significant differences in each of the systems (visual, auditory, tactile, gustatory, vestibular, and proprioceptive) (p = 0.00). Cervera et al.27 also performed a study in a sample of children with ASD and DT in Spain, in this case, they reported that statistical comparisons revealed significant differences between both groups (p = 0.00).

Regarding the level of the auditory sensory processing system, both the group with ASD and the group with DT, register a threshold within the typical sensory parameters, that is, their performance is in accordance with the chronological age, those results are contrary to the exposed by Tomchek and Dunn26 where 77.6% of children with ASD present alterations in this system and 87.8% of children with SD have a performance within the range. Similarly, in Canada, in a study conducted by Nadon et al.28, I observed that 55.8% of children with ASD presented alterations of the auditory type that affect their daily functioning.

In the visual system, DT children presented a low response threshold compared to children with ASD. The last thing coincides with the study carried out by Nadon et al.28 and Tomchek and Dunn26. Where children with ASD present a typical performance score and children with SD were below the scores established by the Winnie Dunn scale.

In relation to the tactile system, the majority of the group with ASD tended to have a high response threshold in proportion to the group with DT that presented a performance within the typical range. This coincides with the study carried out by Linde et al.25, which reports that 60.1% of children with ASD present alterations in this system.

In the gustatory system, the majority of children with ASD had a higher response threshold compared to children with DT who presented a performance according to age. These results are related to the study developed by Dunn12 and Al-Heizan et al.29 where they also reported deficiencies in this system, specifically 54.1% of children with ASD evaluated, parents reported the intake of only some foods, in the case of children with DT their food intake was wider. In relation to the behavioral item, it was identified that the majority of the group with ASD reflect poorly adapted behaviors as consequences of faults in patterns and sensory systems. This coincides with the study carried out by Cervera et al.27 and Little et al.24 it was identified that the majority of the group with ASD presents alterations at the level of social participation due to deficiencies in the sensory system, children with DT show adaptive responses according to the expected performance for their age.

Conclusions

From this study, we can infer that there are differences between the sensory profiles of the compared groups as they were DT and ASD, in addition, the sensory deficit prevalence is higher in ASD than in children with TD. In this case, it is of vital importance the intervention of these deficiencies through sensory integration programs that allow a foster adaptive response by children with ASD. It is necessary that this type of sensory modulation be provided at home, school, and in the therapeutic environment for each one of the professionals in charge of the intervention in this type of population.

Despite the limitations that some professionals have to certify themselves as sensory integrators, we believe that this work is a first step to examine in a sample of Colombian children with and without ASD dysfunctions in sensory integration, and therefore raise awareness about the different difficulties that this group usually faces.

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Ethical disclosures

Protection of people and animals. The authors declare that the procedures followed to conform to the ethical standards of the responsible human experimentation committee and in accordance with the World Medical Association and the Declaration of Helsinki.

Confidentiality of the data. The authors declare that they have followed the protocols of their work center on the publication of patient data.

Right to privacy and informed consent. The authors have obtained the informed consent of the patients and/or subjects referred to in the article. This document is in the possession of the correspondence author.

FundingThe particular sources of financing for this scientific report was Foundart Academy Headquarters, Miami, United States.

Received: January 07, 2019; Accepted: March 27, 2019

* Correspondence: Rosa Isabel Fonseca-Angulo E-mail: rosafonse_2004@hotmail.com

Conflicts of interest

The authors declare that there are no relevant conflicts of interest.

Creative Commons License Instituto Nacional de Cardiología Ignacio Chávez. Published by Permanyer. This is an open ccess article under the CC BY-NC-ND license