Dutch NonSpeech Test

Abstract

The Nederlandstalige NonSpeech test (NNST) is a standardized diagnostic instrument specifically designed for the observation, scoring, and evaluation of communication preconditions and early verbal and non-verbal communication. This tool is essential in clinical and developmental settings, particularly for assessing young children and individuals who utilize little to no spoken language due to a handicap or severe disability.

Structurally, the NNST is comprised of two distinct primary components: a receptive observation scale and an expressive observation scale, allowing for a comprehensive assessment of both understanding and output capabilities in non-speech modalities. The test provides a systematic approach to identifying fundamental communication skills outside of conventional speech measures.

Keywords

Non-speech communication, Early communication, Standardized test, Observation scale, Developmental assessment, Receptive skills, Expressive skills, Communication disorder.

Authors

Huer M (Original development, 1983), Zink I (Dutch adaptation, 2000), Lembrechts D (Dutch adaptation, 2000).

Purpose

The primary purpose of the NNST is to serve as a robust diagnostic instrument for populations whose communication abilities cannot be adequately measured using traditional language-based assessments. It systematically evaluates the foundational components necessary for successful human communication, focusing heavily on pre-verbal behaviors and non-speech output.

The test provides clinicians and researchers with quantifiable data regarding a subject’s current level of communicative competence, facilitating the establishment of appropriate intervention goals. It is particularly valuable in the assessment of individuals with profound developmental delays or severe physical handicaps that impede speech production.

Construct

The NNST measures the psychological construct of fundamental communication competence, specifically addressing the precursors to and early manifestations of intentional communication. This construct is operationalized through the dual scales focusing on two key dimensions:

• Receptive Communication: The capacity to understand, interpret, and respond appropriately to non-verbal cues, environmental stimuli, and basic linguistic input, even without producing speech.

• Expressive Communication: The ability to intentionally convey needs, desires, and information through non-speech modalities, such as gestures, facial expressions, vocalizations (non-linguistic), and body movements.

Validity

Specific data regarding the psychometric validity (e.g., construct, criterion, or content validity) of the original 1983 scale or the 2000 Nederlandstalige adaptation were not provided in the source documentation. As a standardized observation tool, strong content validity is typically implied by the comprehensive nature of the behaviors observed across the receptive and expressive domains, which align with established developmental milestones in early communication.

Reliability

Detailed information concerning the reliability coefficients (e.g., internal consistency, test-retest reliability, or inter-rater reliability) for the NNST is not present in the available source material. Given that the NNST is an observational scale, high inter-rater reliability among trained assessors would be critical to ensure consistent scoring across different clinical environments.

Factor Analysis

The source documentation does not include information regarding formal factor analysis conducted on the NNST. The structure suggests a two-factor model corresponding to the receptive and expressive observation scales; however, empirical evidence supporting the dimensional structure of the test items requires further documentation.

Instrument

Test Type: Observation

Format: Standardized observation scale, divided into receptive and expressive sections, requiring a trained assessor to score observed behaviors against predefined criteria.

Language Available: Dutch (Nederlandstalige)

Population Group: Clinical and developmental populations, focusing on individuals with communication impairments.

Age Group: Primarily young children, but also applicable to older individuals with significant communicative or intellectual disabilities.

Population Details: Includes children and persons who, due to physical or cognitive handicaps, apply little or no spoken language. Associated functions assessed include Communication and Mental functions, often involving the Head/neck region (as a focus for non-verbal cues).

Test Methodology: Direct behavioral observation during structured or semi-structured interaction sessions. The assessor records the presence, frequency, and quality of specific non-verbal and early verbal behaviors according to the established scoring manual.

Keywords

Non-verbal assessment, Developmental psychology, Communication evaluation, Observational methods, Pre-verbal skills, Dutch language assessment, Handicap assessment.

Authors

Author ORCID Identifier: Not specified in source documentation.

Affiliation Email addresses: Not specified in source documentation.

Correspondence Address: Not specified in source documentation.

Permissions & Fee and Test Year

The original conceptualization of the test was developed by Huer M in 1983. The specific Dutch adaptation (Nederlandstalige versie) was published by Zink I and Lembrechts D in 2000. Permissions and fee structures for clinical use are typically proprietary and must be obtained directly from the test publisher or copyright holder.

The original PDF explanation form (Toelichtingsformulier) for the instrument can be downloaded here: Toelichtingsformulier.

Reference’s

• Huer M. (1983). Original scale development.

• Zink I, Lembrechts D. (2000). Nederlandstalige NonSpeech test (NNST) adaptation.

Items of the Nederlandstalige NonSpeech test

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

The specific items and scoring criteria for the Nederlandstalige NonSpeech test were not included in the provided source content.