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Reliability and Validity of the Diagnostic Instrument on Adaptive Behaviour: A New Instrument Measuring Adaptive Behaviour in People with Moderate, Severe or Profound Intellectual Disability

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Title: Reliability and Validity of the Diagnostic Instrument on Adaptive Behaviour: A New Instrument Measuring Adaptive Behaviour in People with Moderate, Severe or Profound Intellectual Disability
Language: English
Authors: Hinke Elisabet Drijver (ORCID 0000-0001-8006-073X), Robert Didden (ORCID 0000-0001-5009-4269), Carlo Schuengel (ORCID 0000-0001-5501-3341)
Source: Journal of Applied Research in Intellectual Disabilities. 2025 38(6).
Availability: Wiley. Available from: John Wiley & Sons, Inc. 111 River Street, Hoboken, NJ 07030. Tel: 800-835-6770; e-mail: cs-journals@wiley.com; Web site: https://www.wiley.com/en-us
Peer Reviewed: Y
Page Count: 14
Publication Date: 2025
Document Type: Journal Articles
Reports - Research
Descriptors: Test Reliability, Test Validity, Clinical Diagnosis, Adjustment (to Environment), Moderate Intellectual Disability, Severe Intellectual Disability, Adults, Foreign Countries, Scores, Daily Living Skills, Psychomotor Skills
Geographic Terms: Netherlands
DOI: 10.1111/jar.70150
ISSN: 1360-2322
1468-3148
Abstract: Background: Assessment of adaptive behaviour of people with moderate to profound intellectual disability is hampered by limited variation in scores within this range. We evaluated measurement properties of the Diagnostic Instrument on Adaptive Behaviour (DIAB), which was developed for this population. Method: The DIAB was completed by two care staff members for 73 adults (age 19-84) grouped by level of intellectual disability (i.e., moderate, severe or profound intellectual disability) along with Dutch normed measures of adaptive and motor functioning and a global rating. Results: Inter-rater (ICC = 0.94) and test--retest (ICC = 0.96) reliability met standards. DIAB scores correlated highly with those of the two Dutch instruments (r = 0.90; r = 0.77). Associations between measures were consistent with convergent and discriminant validity. DIAB scores differed between three severity levels of ID (p < 0.001). Conclusion: The DIAB exhibited promising reliability, convergent, discriminant, concurrent, and known group validity.
Abstractor: As Provided
Entry Date: 2026
Accession Number: EJ1494004
Database: ERIC
FullText Text:
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  Data: Reliability and Validity of the Diagnostic Instrument on Adaptive Behaviour: A New Instrument Measuring Adaptive Behaviour in People with Moderate, Severe or Profound Intellectual Disability
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  Data: &lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Hinke+Elisabet+Drijver%22&quot;&gt;Hinke Elisabet Drijver&lt;/searchLink&gt; (ORCID &lt;externalLink term=&quot;https://orcid.org/0000-0001-8006-073X&quot;&gt;0000-0001-8006-073X&lt;/externalLink&gt;)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Robert+Didden%22&quot;&gt;Robert Didden&lt;/searchLink&gt; (ORCID &lt;externalLink term=&quot;https://orcid.org/0000-0001-5009-4269&quot;&gt;0000-0001-5009-4269&lt;/externalLink&gt;)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Carlo+Schuengel%22&quot;&gt;Carlo Schuengel&lt;/searchLink&gt; (ORCID &lt;externalLink term=&quot;https://orcid.org/0000-0001-5501-3341&quot;&gt;0000-0001-5501-3341&lt;/externalLink&gt;)
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  Data: Wiley. Available from: John Wiley &amp; Sons, Inc. 111 River Street, Hoboken, NJ 07030. Tel: 800-835-6770; e-mail: cs-journals@wiley.com; Web site: https://www.wiley.com/en-us
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  Data: 10.1111/jar.70150
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  Data: 1360-2322&lt;br /&gt;1468-3148
– Name: Abstract
  Label: Abstract
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  Data: Background: Assessment of adaptive behaviour of people with moderate to profound intellectual disability is hampered by limited variation in scores within this range. We evaluated measurement properties of the Diagnostic Instrument on Adaptive Behaviour (DIAB), which was developed for this population. Method: The DIAB was completed by two care staff members for 73 adults (age 19-84) grouped by level of intellectual disability (i.e., moderate, severe or profound intellectual disability) along with Dutch normed measures of adaptive and motor functioning and a global rating. Results: Inter-rater (ICC = 0.94) and test--retest (ICC = 0.96) reliability met standards. DIAB scores correlated highly with those of the two Dutch instruments (r = 0.90; r = 0.77). Associations between measures were consistent with convergent and discriminant validity. DIAB scores differed between three severity levels of ID (p &lt; 0.001). Conclusion: The DIAB exhibited promising reliability, convergent, discriminant, concurrent, and known group validity.
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  Data: As Provided
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  Data: 2026
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  Label: Accession Number
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  Data: EJ1494004
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=eric&AN=EJ1494004
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      – Type: doi
        Value: 10.1111/jar.70150
    Languages:
      – Text: English
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        PageCount: 14
    Subjects:
      – SubjectFull: Test Reliability
        Type: general
      – SubjectFull: Test Validity
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      – SubjectFull: Clinical Diagnosis
        Type: general
      – SubjectFull: Adjustment (to Environment)
        Type: general
      – SubjectFull: Moderate Intellectual Disability
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      – SubjectFull: Severe Intellectual Disability
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      – SubjectFull: Adults
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      – SubjectFull: Foreign Countries
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      – SubjectFull: Scores
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      – SubjectFull: Daily Living Skills
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      – SubjectFull: Psychomotor Skills
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      – SubjectFull: Netherlands
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      – TitleFull: Reliability and Validity of the Diagnostic Instrument on Adaptive Behaviour: A New Instrument Measuring Adaptive Behaviour in People with Moderate, Severe or Profound Intellectual Disability
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            NameFull: Hinke Elisabet Drijver
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            NameFull: Robert Didden
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            NameFull: Carlo Schuengel
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              M: 11
              Type: published
              Y: 2025
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              Value: 38
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            – TitleFull: Journal of Applied Research in Intellectual Disabilities
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