Interactive Dyslexia Test Amsterdam-Antwerp-MBO

Abstract

The Interactieve Dyslexietest Amsterdam-Antwerpen-MBO (IDAA-mbo) is a dedicated screening instrument designed to identify indicators of dyslexia and other associated learning difficulties among students in Middle-level Applied Education (MBO) in the Netherlands and Belgium. Its primary function is to provide preliminary information regarding the severity and nature of reading difficulties, facilitating the timely referral of students for comprehensive diagnostic assessment and subsequent provision of appropriate educational support and remedial measures. The instrument also assesses co-occurring difficulties in vocabulary and numeracy to determine the potential multifaceted nature of the student’s learning profile.

Keywords

Dyslexia, MBO, Vocational Education, Screening, Reading Problems, Learning Difficulties, Vocabulary, Numeracy, Diagnostic Assessment.

Authors

Bekebrede JI, et al. (2010)

Purpose

The IDAA-mbo serves a critical tripartite purpose within the context of vocational education. Firstly, it aims to signal MBO students who exhibit significant reading difficulties, thus indicating a potential diagnosis of dyslexia. This initial screening allows educators and support staff to initiate the process of full diagnostic investigation in consultation with the student.

Secondly, the instrument provides crucial information regarding the co-occurrence of reading problems with difficulties in two other key academic domains: vocabulary acquisition and numeracy (arithmetic). By assessing these related skills, the IDAA-mbo helps to identify the potential multifaceted nature of the student’s learning profile, moving beyond isolated reading deficits.

Finally, the data collected by the IDAA-mbo contributes directly to the subsequent stages of support. The results are used to inform the design of targeted remedial and supportive interventions tailored to the specific needs identified during the screening process within the MBO educational setting.

Construct

The primary psychological construct measured by the IDAA-mbo is the presence and severity of specific learning difficulties related to reading and spelling, characteristic of developmental dyslexia. This construct encompasses core deficits in phonological awareness, rapid automatized naming, and efficient word decoding, which manifest as slow or inaccurate reading performance.

Additionally, the scale is constructed to assess related cognitive functions, specifically lexical knowledge (vocabulary) and fundamental arithmetic skills. This broader assessment approach ensures that the instrument captures the complexity and frequent comorbidity associated with learning disorders in the adolescent and young adult population attending MBO institutions.

Validity

While specific psychometric studies detailing the validity of the IDAA-mbo are typically found in accompanying manuals or dedicated academic papers, the instrument is generally structured to demonstrate strong content validity, ensuring alignment with recognized diagnostic criteria for Specific Learning Disorder (SLD) in reading.

Furthermore, evidence of criterion validity is expected through documented correlations between IDAA-mbo scores and scores derived from established, comprehensive diagnostic reading assessments administered to the MBO population. Construct validity is supported by the measure’s ability to differentiate between students with typical reading skills and those with severe reading deficits, as well as its capacity to distinguish reading difficulties from co-occurring challenges in vocabulary and arithmetic.

Reliability

The reliability of the IDAA-mbo, crucial for a high-stakes screening instrument, typically relies on two main metrics. Internal consistency, usually assessed via Cronbach’s alpha, should be high (often >.80) across the subscales measuring core reading components, indicating that the items within each subtest measure the same underlying construct effectively.

Additionally, test-retest reliability studies are performed to confirm the stability of the scores over a short interval (e.g., 2–4 weeks), ensuring that a student’s classification status (at-risk vs. typical) remains consistent, providing confidence in the instrument’s use for initial signal detection.

Factor Analysis

Given the multidimensional nature of the IDAA-mbo, encompassing reading, vocabulary, and numeracy, a Confirmatory Factor Analysis (CFA) is typically employed to validate its underlying structure. The expected model posits at least three distinct, yet correlated, factors corresponding to the identified domains of learning difficulty.

Successful factor analytic results confirm that the specific items designed to measure reading problems load strongly onto the reading factor, separate from the items measuring vocabulary or arithmetic skills. This structural validation ensures that the instrument accurately captures the independent and co-occurring variances associated with different types of learning problems in the MBO population.

Instrument

Test Type: Observational Screening Instrument

Format: Computer-based interactive test administered individually or in a group setting

Language Available: Dutch

Population Group: Students in Middle-level Applied Education (MBO) / Vocational Education (Also broadly applicable to older adolescents/young adults requiring specific learning assessment)

Age Group: Typically 16 to 25 years (MBO student demographic)

Population Details: Students enrolled in MBO institutions across the Netherlands and Flanders (reflecting the Amsterdam-Antwerp collaboration).

Test Methodology: Timed and untimed subtests assessing reading fluency, decoding accuracy, word recognition, basic arithmetic, and vocabulary knowledge.

Keywords

MBO Students, Screening Test, Psychological Assessment, Reading Fluency, Decoding, Learning Support, Remedial Measures.

Authors

Author ORCID Identifier: N/A (Information not publicly available)

Affiliation Email addresses: N/A (Contact details usually restricted to research departments)

Correspondence Address: Research Institute for Child Development and Education, University of Amsterdam (Inferred)

Permissions & Fee and Test Year

Test Year: 2010

The IDAA-mbo is a standardized, proprietary instrument. Usage typically requires official licensing and training for qualified professionals within MBO institutions. Permissions must be obtained from the publisher or copyright holder (usually the University or affiliated research group) prior to administration, and associated usage fees may apply depending on the scale of implementation.

Reference’s

Bekebrede JI, et al. (2010). Handleiding Interactieve Dyslexietest Amsterdam-Antwerpen-MBO (IDAA-mbo). [Publisher Information Inferred].

The explanatory PDF document (Toelichtingsformulier) related to the instrument can be downloaded here: Toelichtingsformulier (PDF).

Items of the Interactieve Dyslexietest Amsterdam-Antwerpen-MBO

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.

The specific items comprising the Interactieve Dyslexietest Amsterdam-Antwerpen-MBO are proprietary and not available in the source material. However, the instrument typically includes subtests covering the following components:

• Leessnelheid en nauwkeurigheid (Reading speed and accuracy)
• Woordherkenning (Word recognition)
• Pseudo-woord decoding (Non-word decoding)
• Woordenschat (Vocabulary knowledge)
• Rekenkundige basisvaardigheden (Basic arithmetic skills)