Wied Ruijssenaars

Validity and suitability of the Bayley-III Low Motor/Vision version: A comparative study among young children with and without motor and/or visual impairments

The aim of the present study was to examine the validity of the Bayley-III Low Motor/Vision version, and its suitability for children with motor and/or visual impairment(s). This version contains accommodated items, that is, adaptations to minimize impairment bias, without altering what the test measures. We hypothesized that the accommodations would not affect the item scores of children without impairment, and that children with impairment(s) would benefit from the accommodations. We tested 41 children without impairment and 63 children with impairment with both the standard Bayley-III and the Low Motor/Vision versions, in randomly counterbalanced order. The test administrators filled in an evaluation form. Results showed that the accommodations did not affect the test scores of children without impairment and did improve the test scores of children with impairment on the Cognition scale, while no improvement was found for the other scales. The test administrators indicated that the vast majority of the children with impairment had been able to show their abilities on the test and that the accommodations were beneficial in 29 out of these 52 cases. For some children, the accommodated instrument appeared to be unsuitable because the impairment was too severe. The conclusion is that the accommodations improve the validity of the Bayley-III when used with children with mild to moderate motor and/or visual impairment, especially with regard to the Cognition scale.

The development of a checklist of child characteristics for assessment purposes

Until recently, pupils in The Netherlands with a developmental perspective of up to 24 months and with additional disabilities rarely made use of the educational facilities available. As a result of a new law passed in 2002, an increasing number of pupils with profound and multiple learning difficulties (PMLD) will attend school. Given the heterogeneity of this group of pupils, an appropriate method of assessment is needed to chart the abilities that these pupils have and to allow a suitable educational programme to be developed on the basis of the results obtained. As the existing instruments are not generally very satisfactory, a new instrument has been developed. This is a checklist that has been subjected to reliability trials and factor analysis after formulation of suitable items. The results indicate that it is a reliable checklist, with factors that can be interpreted accurately in terms of development perspectives (functions, activities and participation).

Accommodating the Bayley-III for motor and/or visual impairment: A comparative pilot study

Purpose: This study assessed the validity and usefulness of the Bayley Scales of Infant and Toddler Development, Third Edition (Bayley-III) Low Motor/Vision accommodated version. Accommodations are adaptations to minimize impairment bias, without altering what the test measures. Of the items, 66% have Low Motor accommodations like enlarged materials; 62% have Low Vision accommodations. Methods: Using a within-subject design, we tested 19 children with the accommodated and standard Bayley-III, in a randomly counterbalanced order. The children had motor and/or visual impairment and a chronological age between 22 and 90 months. The test administrators completed an evaluation form. Results: A subgroup of children benefited from the accommodations; 2 children obtained a large raw score difference. Test administrators considered the accommodations as practical, and advantageous for most children. Conclusion: The Low Motor/Vision accommodated version seems to validly assess the development of this population. Future, larger-scale research should study whether the accommodations improve the construct validity of the Bayley-III.

Stimulating Intersubjective Communication in an Adult with Deafblindness : A Single-Case Experiment

Sensory disabilities may limit a persons development of intersubjectivity, that is, the awareness of self and other, which develops in conjunction with interpersonal communication. This study used intersubjectivity theory to test a new intervention called the High-Quality Communication (HQC) intervention for its effects on a young adult with congenital deafblindness and a developmental age of between 1.5 and 4 years. Three of his social partners were trained to support attunement and meaning making with him through education and video feedback. This study measured seven observation categories at three layers of intersubjective development during a baseline and two intervention phases: dyadic interaction, shared emotion, referential communication, meaning negotiation, shared meaning, declarative communication, and shared past experience. The participants use of conventional communication was included as an additional category. Effects were observed in all observation categories from the baseline to the intervention phases. Further study of the effectiveness of the HQC intervention is recommended to test whether effects generalize across people and settings.

The validity of support profiles for children with profound multiple learning difficulties

As a result of a new law passed in The Netherlands, in 2002, an increasing number of children with profound and multiple learning difficulties will attend school. The complexity of the target group requires appropriate assessment that is focused on programme planning. A new instrument, the Checklist of child characteristics, has been developed for this purpose. This paper demonstrates how the scores on the checklist can be transformed into support profiles. It then discusses the results of a validity assessment conducted on support profiles that were compiled for 32 pupils. These results suggest that the instrument is valid.

Intervening on Affective Involvement and Expression of Emotions in an Adult With Congenital Deafblindness

This study examined the effects of a 20-week intervention to foster affective involvement during interaction and communication between an adult with congenital deafblindness (CDB) and his caregivers in a group home and a daytime activities center. Using a single-subject design, we examined whether the intervention increased affective involvement between the participant and his caregivers, and whether the participant’s positive emotions increased and his negative emotions decreased. In both settings, an increase in affective involvement and very positive emotions coincided with the onset of the intervention, with the clearest effects in the daytime activities center. Negative emotions decreased in the daytime activities center. During follow-up, affective involvement decreased in both settings but remained above baseline. The caregivers indicated that it was easier to share positive emotions than negative emotions. This study demonstrates that it is possible to foster affective involvement with an adult with CDB, both during interaction and communication.

The Application of Dynamic Assessment in People Communicating at a Prelinguistic Level: A descriptive review of the literature

Many people with severe disabilities face difficulties communicating with their communication partners and rely primarily on prelinguistic communication. It is accepted that dynamic assessment can play an important role in improving communication and in measuring a person’s ability to learn new communicative skills. Less is known, however, about the application of dynamic assessment in the case of those who communicate at a prelinguistic level. The present article reviewed dynamic assessment procedures that addressed communication abilities in people communicating at a prelinguistic level and young children who communicate using speech, with the aim of identifying key elements of dynamic assessment for persons communicating at a prelinguistic level. The results indicated the need for the identification of contextual variables that support communicative competence, teaching communication partners new skills, and a procedure that is highly individualised. Further research on the validity and reliability of these dynamic assessments is strongly recommended.

A comparison of natural and non-natural soundscapes on people with severe of profound intellectual and multiple disabilities

ABSTRACT Background Previous research indicates that there is a relationship between the auditory environment and the core affects (or mood) of people with severe or profound intellectual disability. We conducted a systematic study to further explore this relationship. Method Thirteen participants with severe or profound intellectual disability and challenging behaviour were presented with 5 different soundscapes (Beach, Forest, Urban, Music, and Silence) in a dedicated room. Direct support professionals made core affect observations before and after each trial. Results A trend was visible in the core affect observations, with a prominent and consistent increase in the frequency of observations of a Relaxed core affect across conditions. However, a greater increase in the frequency of observations of a Relaxed core affect and a greater decrease in the frequency of observations of an Interested core affect were associated with the natural conditions (Forest and Beach) rather than the non-natural conditions (Urban and Music). Conclusion This pilot study could serve an important role in raising awareness and stimulating further research regarding the auditory environments of people with severe or profound intellectual disability.

Examining relationships between staff attributions of soundscapes and core affect in people with severe or profound intellectual and visual disabilities

ABSTRACT Background People with profound intellectual disability experience a high prevalence of visual disability, making them more dependent on sound. However, research addressing the influence of the auditory environment is scarce. Method Observations of the auditory environments (soundscapes) and moods of people with profound intellectual and visual disabilities, in terms of core affect, were conducted in residential facilities by direct support personnel. Appraisals of soundscape and core affect dimensions were combined and analysed by means of multilevel linear regression. Results Findings endorse a positive relationship between the observed pleasantness and eventfulness of soundscapes and core affect of people with profound intellectual and visual disabilities. Conclusion Based on the results of this study we suggest a relationship between soundscapes and moods of people with profound intellectual and visual disabilities, as judged by staff members engaged in their environments. These findings give reason to believe that improved soundscapes could ameliorate the moods of the residents.

Low verbal assessment with the Bayley-III

Recently, the authors have developed the Bayley-III-NL Low Verbal for developmental assessment of children with language impairment. The Low Verbal version consists of an accommodated cognition scale, and non-accommodated communication and motor scales. The purpose of the study was to evaluate the validity and added value of the Bayley-III-NL Low Verbal for children with a language impairment, in relation to the standard Bayley-III-NL for children without impairment. We administered the Bayley-III Low Verbal to 69 children with language impairment, and the standard Bayley-III-NL to 1132 children without impairments. We used an evaluation form for test administrators and interviews with developmental psychologists to evaluate the suitability of the Low Verbal version for the target group. We analyzed the test results using nonparametric item response theory (IRT) to investigate whether test results can be reasonably compared across the two groups. The results of the IRT analyses support the validity of the Bayley-III-NL Low Verbal: the test items do not suffer from differential item functioning (DIF) across the two groups, and thus measure the ability levels of interest in the same way. The results of the evaluation form and interviews confirm that the Bayley-III-NL Low Verbal has added value for testing children with a language impairment, especially for children up to 36 months old. It is also suitable for children with general developmental delay. We conclude that the Bayley-III-NL Low Verbal can validly assess the cognitive, language, and motor development of young children with a language impairment and is the preferred instrument for this target group.