The threshold hypothesis: two levels of bilingual competence mediate cognitive and academic effects of bilingualism¶
Theory · All theories
Evidence · 4 claims (3 for, 1 mixed) · 2 studies (1 review, 1 theoretical),q1–q2· 0 of 2 report an effect size · 4 claims rest on one study
Description¶
The threshold hypothesis holds that there are threshold levels of linguistic competence bilingual children must attain, such that "there may be threshold levels of linguistic competence which bilingual children must attain both in order to avoid cognitive disadvantages and allow the potentially beneficial aspects of bilingualism to influence his/her cognitive and academic functioning." The paper's preferred form posits two thresholds: attaining a lower threshold suffices to avoid negative cognitive effects, while a second, higher level is necessary for accelerated cognitive growth. The hypothesis treats level of competence in the two languages as an intervening variable mediating bilingualism's effects on cognition, and is expressed in a figure relating type of bilingualism (additive, dominant, semilingualism) to positive, neutral, or negative cognitive effects.
Design Implications¶
Context¶
Requirements¶
- Threshold levels cannot be defined in absolute terms; they vary with the child's stage of cognitive development and the academic demands of different stages of schooling
Constraints¶
- The paper states the threshold hypothesis tells little about how L1 and L2 skills are related to one another or which school programs promote additive versus subtractive bilingualism
Target Learners¶
- Bilingual children in elementary and secondary schooling
Target Learning Objectives¶
- Cognitive development
- Academic outcomes of different patterns of bilingual skills
Claims¶
- High L2 Achievers Show Iq Gains In Immersion [+M]
- Semilingualism Associated With Negative Cognitive Effects [+M]
- About 750 contact hours of high school ESL support can have a tangible effect toward the postsecondary threshold [~W]
- Youngest-arriving ESL learners risk acquiring neither L1 nor L2 at the level school demands [+W]
Related Theories¶
- Linguistic Threshold Hypothesis versus Linguistic Interdependence Hypothesis for ELL reading comprehension
- Cummins' theoretical framework relating language proficiency to academic achievement via threshold and interdependence hypotheses
Examples¶
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Key Sources¶
- Cummins, James. (1979). Linguistic interdependence and the educational development of bilingual children. https://eric.ed.gov/?id=ED257312. doi:10.3102/00346543049002222
Page metadata
| Field | Value |
|---|---|
type |
theory |
title |
The threshold hypothesis: two levels of bilingual competence mediate cognitive and academic effects of bilingualism |
description |
The threshold hypothesis holds that there are threshold levels of linguistic competence bilingual children must attain, such that "there may be threshold levels of linguistic competence which bilingual children must a... |
status |
review |
canonical |
True |
generated |
by claude/unspecified on 2026-09-25 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — cummins-1979 |
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