Imitation-Comprehension-Production (ICP) Test

Abstract

The Imitation-Comprehension-Production (ICP) Test, developed by Fraser, Bellugi, and Brown in 1963, is a foundational instrument used in developmental psycholinguistics to evaluate the stages of children’s acquisition of grammatical contrasts. This task-based assessment focuses specifically on three modalities of linguistic behavior: Imitation (I), Comprehension (C), and Production (P). The ICP Test was designed to determine the developmental sequence of these three language skills, particularly whether comprehension precedes production, or vice versa, when dealing with complex syntactic structures. The complete instrument includes 10 distinct grammatical contrasts, with six corresponding examples constructed for each contrast, alongside four initial practice items.

Keywords

Imitation-Comprehension-Production Task, Test Development, Language Acquisition, Nonverbal Pointing, Verbal Comprehension, Grammatical Contrasts, Psycholinguistics.

Authors

Fraser, Colin, Bellugi, Ursula, Brown, Roger

Purpose

The primary purpose of the ICP Test is to systematically assess the developing capacity of children to manage and deploy specific grammatical contrasts in English. The test specifically aims to isolate and measure the child’s ability across the three fundamental stages of language learning—imitation, comprehension, and production—to understand their relative developmental ordering.

By requiring children to apply linguistic structures (presented orally) to visual stimuli (pictures), the test provides empirical evidence regarding how well a child understands nuanced differences in sentence structure (e.g., active vs. passive voice, singular vs. plural) and how they manifest this understanding through nonverbal production (pointing).

Construct

The scale measures two primary and interconnected psychological constructs: Language Comprehension and Language Production. The authors utilized the three-part framework (Imitation, Comprehension, Production) to dissect the proficiency level associated with mastering specific syntactic rules.

Language Comprehension is evaluated by requiring the child to interpret a given utterance and correctly select the corresponding picture. Language Production, specifically the nonverbal pointing task (P), assesses the child’s ability to demonstrate understanding of the required reference without necessarily generating the speech output itself. Imitation (I) serves as the baseline, testing the child’s ability to repeat the utterance immediately after hearing it, which often precedes full comprehension or production.

Validity

Specific information regarding the formal validity of the Imitation-Comprehension-Production Test was not explicitly reported in the initial 1963 publication. The original work focused primarily on establishing the developmental sequence of the three modalities (I > C > P) for specific grammatical structures, rather than detailed psychometric validation.

However, the test possesses inherent face validity, as the tasks directly require the child to demonstrate processing and understanding of the specific grammatical contrasts under investigation, a crucial element for assessing early syntactic development.

Reliability

Detailed measures of internal consistency (e.g., Cronbach’s alpha) or test-retest reliability were not provided in the original study by Fraser, Bellugi, and Brown (1963). The focus of the methodology was on the comparative performance across the three modalities (I, C, P) rather than establishing traditional psychometric stability.

Researchers utilizing the ICP framework in subsequent studies have often implemented their own reliability measures specific to their adapted versions, but the original instrument lacks formally published reliability coefficients.

Factor Analysis

No formal factor analysis was conducted or reported for the original 1963 version of the ICP Test. Factor analysis is typically employed to confirm whether the items cluster into the intended underlying factors (e.g., a single language proficiency factor, or distinct comprehension and production factors).

Given the test’s structure—designed specifically to test sequential mastery of grammatical rules across three behavioral modalities—the initial research design did not necessitate a factor analytic approach to validate the underlying structure.

Instrument

Test Type: Task-based standardized assessment; specifically designed as a measure of linguistic performance hierarchy.

Format: The test comprises 60 scored items, derived from 10 grammatical contrasts, each presented in six different examples. Responses are scored based on the child’s ability to correctly match an oral utterance to one of two contrasting pictures (nonverbal pointing).

Language Available: English (Original study conducted in the United States).

Population Group: Human (Male and Female).

Age Group: Childhood (Preschool Age, approximately 2 to 5 years).

Population Details: The initial sample consisted of children located in the United States, aged approximately 37 to 43 months.

Test Methodology: The administration method is structured as an interview. The methodology is comparative, designed to score performance across Imitation, Comprehension, and Production tasks for identical linguistic structures. No standard psychometric information (beyond descriptive statistics of performance) was provided with the original publication.

Keywords

Imitation (Learning), Language Production, Verbal Comprehension, Test Construction, Psycholinguistics, Child Language Assessment, Fraser Bellugi Brown.

Authors

Author ORCID Identifier: Not provided.

Affiliation Email addresses: Not provided.

Correspondence Address: Correspondence for the original authors (Fraser, Bellugi, and Brown) was associated with Harvard University at the time of publication (1963).

Permissions & Fee and Test Year

The original study was published in 1963. Test items are not openly available in the published article. Researchers seeking access to the specific stimuli used in the original Imitation-Comprehension-Production Test tasks are typically directed to contact the original authors’ affiliated institutions or the journal publisher.

Reference’s

Fraser, C., Bellugi, U., & Brown, R. (1963). Control of grammar in imitation, comprehension, and production. Journal of Verbal Learning & Verbal Behavior, 2(2), 121–135. https://doi.org/10.1016/S0022-5371(63)80076-6

Items of the Imitation-Comprehension-Production (ICP) Test

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

The specific test items for the Imitation-Comprehension-Production (ICP) Test are not publicly available within the published literature. To access the test items, researchers are instructed to contact the original authors or the publisher.