Self- and proxy-rated needs in adults with mild to moderate intellectual disabilities: Perspective matters

Does adapting a self-report instrument to improve its cognitive accessibility for people with intellectual disability result in a better measure? - A cognitive interview study

BACKGROUND AND AIMS

We investigated whether improving the cognitive accessibility of a widely used self-report measure leads to better understanding and more accurate answers in a sample of adults with mild intellectual disability and borderline intellectual functioning.

METHODS AND PROCEDURES

We undertook a series of cognitive interviews before and after adaptation of the instructions and selected items of an existing self-report measure of adaptive functioning. Interview results and participant feedback were supplemented with quantitative comparisons between participant and carer scores.

OUTCOMES AND RESULTS

Adaptation based on participant experiences and preferences combined with evidence-informed guidelines improved understanding and accuracy. Self-report and carer-report scores showed greater convergence after adaptation; this occurred because people with intellectual disabilities appeared to understand the self-report measure more effectively.

CONCLUSIONS AND IMPLICATIONS

The results show that adaptation of the self-report instrument to suit the needs and preferences of people with mild intellectual disability or borderline intellectual functioning leads to a more accessible measure and more reliable and valid results. Results also highlight the importance of complementing proxy reports with a first-person perspective in assessment as clients and informants may differ in their assessment of behavior and skills.

Scale of Emotional Development - Short: reliability and validity in adults with intellectual disability

BACKGROUND

Intellectual disability (ID) is often associated with delays in emotional development (ED). The Scale of Emotional Development - Short (SED-S) was developed to assess the level of ED and to adapt treatment and care accordingly.

METHODS

In a sample of 724 adults from five study sites in three countries, a confirmatory factor analysis with a one-factor model was conducted on the entire dataset as well as in different subgroups. Furthermore, internal consistency was investigated using Cronbach's alpha.

RESULTS

The confirmatory factor analysis indicated that a single-factor model fits the SED-S data well. The subgroup analyses revealed good model fit, regardless of the severity of ID and irrespective of sex or the presence of autism spectrum disorder or psychiatric disorders. Internal consistency was excellent for the entire sample (Cronbach's alpha = 0.93) and various subgroups (0.869-0.938).

CONCLUSION

The results of this study suggest that the SED-S is psychometrically sound and can be used to assess the level of ED in adults with ID.

Putting "ME" into measurement: Adapting self-report health measures for use with individuals with intellectual disability

BACKGROUND

Self-report is important for measuring health outcomes; however, most research in intellectual disability (ID) relies on proxy report. The lack of cognitively accessible measures is one barrier to accurate self-reporting by individuals with ID.

AIMS

This paper describes the process of adapting self-report measures of health status, health-related quality of life, and environment for use by individuals with ID and presents evidence on their usability (accessibility), usefulness (independent self-report), and reliability (internal consistency and test-retest).

METHODS AND PROCEDURES

We used an inclusive research approach, in which we collaborated with adults with ID to revise, cognitively test, and pilot test cognitively accessible self-report measures. Technology supported the independent completion of measures. We assessed usability, usefulness, and reliability of these measures in 41 adults with ID.

OUTCOMES AND RESULTS

The resulting measures are useful (independently completed) and usable (elicit a range of responses), with modest reliability (internal consistency and test-retest).

CONCLUSIONS AND IMPLICATIONS

Self- report by adults with ID is feasible. A key element of this measure adaptation process was engaging adults with ID. More research is needed to understand the reliability and validity of the adapted measures and the characteristics of the population for whom they are most usable.

Proxy-report in individuals with intellectual disability: A scoping review

BACKGROUND

Views can be collected from individuals (self-report) or others on their behalf (proxy-report).

OBJECTIVE

We aimed to review the literature on methods and statistical approaches used to evaluate observer versus self-report responses from individuals with intellectual disability or Down syndrome.

METHODS

A series of key questions related to statistical approaches and data collection methods were formulated a priori to inform the search strategy and review process. These addressed the topics of self-report in individuals with intellectual disability, including Down syndrome. Using the National Library of Medicine database, PubMed, detailed literature searches were performed. The quality of available evidence was then evaluated, the existing literature was summarised, and knowledge gaps and research needs were identified.

RESULTS

Fifty relevant original articles were identified which addressed at least one key question. Study details, including: research design, internal validity, external validity, and relevant results are presented. Review of studies of individuals with intellectual disability which used a variety of statistical approaches showed mixed agreement between self-report and proxy-report.

CONCLUSION

Few studies identified to-date have used self-report from individuals with Down syndrome, but lessons from the existing intellectual disability literature can guide researchers to incorporate self-report from individuals with Down syndrome in the future.

Straight from the horse's mouth: Increasing self-report in mental health assessment in individuals with intellectual disability

BACKGROUND

Mental health conditions are common among individuals with intellectual disability. Under recognition of mental health disorders leading to unmet treatment needs is common in this population. This article addresses one major contributing factor, the lack of cognitively accessible self-report measures for individuals with intellectual disability.

METHOD

In this literature-informed overview of the state of the field, we discuss the need for, and complexities of, including individuals with intellectual disability in mental health assessments.

RESULTS

With appropriate supports, many individuals with intellectual disability can respond to mental health questions. We discuss evidence-based strategies to make mental health assessments more accessible.

CONCLUSION

We highlight the need to engage individuals with intellectual disability to provide first-hand information about their health and well-being. New instruments and research procedures should be developed in partnership with individuals with intellectual disability. Self-report may be essential to advancing the science of mental health research.

Needs of older people with intellectual disabilities: variables influencing inter-respondent (client vs staff) agreement

Background: The importance of understanding the needs of older people with intellectual disabilities (IDs) is obvious, but the research available is limited. This study identifies the self-reported needs of older adults with IDs and compares them with staff reported needs regarding the same older adults with ID, therefore specifying and explaining agreements and disagreements. Method: The needs of 96 older adults with IDs were assessed through the Inventory of Identification of Needs (informant and self-report versions). Results: Both older people with IDs and staff reported quite diverse needs related to all the domains assessed by the IIN: physical health, literacy, information, meaningful activity, participation in the community, mental health, basics needs and accommodation. All the mean scores of the informant version of the IIN were higher than the ones of the self-report version. Agreement amongst informants was influenced by the prominence of needs, the accessibility to and the subjectivity of the information, and social desirability. Conclusions: A consumer-driven approach implies that services should be based on the needs identified.

[Mental health in persons with intellectual disability]

People with intellectual disability (ID) have a high vulnerability to develop mental health problems. The prevalence of mental disorders is higher than in the general population and, in addition, adults with ID often show behavioral problems that imply a need for psychiatric psychotherapeutic care. In view of the impairments of intellectual functioning, impaired adaptive behavioral skills and physical illnesses, the needs of this target group are usually complex and require particular expertise. A number of specific assessment instruments are available for target group-specific diagnostics to collate the cognitive performance and emotional development as well as for psychopathological symptoms and behavioral disorders. To improve the accuracy of diagnosis in the ID population, existing alternatives to DSM or ICD should be applied especially to adults with moderate or severe ID. Guidelines for psychopharmacotherapy and adapted user guides for psychotherapeutic treatment provide support in the context of target group-specific treatment.