Address Mother Tongue Interference¶

Strategy · All strategies
Evidence · 3 claims (3 for) · 7 studies (4 quant-synthesis, 2 causal, 1 associational), q2–q4 · 3 of 7 report an effect size

Description¶

Mother tongue interference (negative L1 transfer) occurs when features of a learner's first language — phonology, syntax, vocabulary, or pragmatics — are carried into the target language in ways that produce errors or impede comprehension. This strategy treats interference as predictable and teachable: the instructor identifies the specific L1–L2 contrasts that affect their learner population, surfaces them explicitly, and provides targeted practice and feedback rather than treating errors as random. Modern SLA frames this as cross-linguistic influence, recognizing that the L1 can also support learning through positive transfer [Odlin, 1989].

Design Implications¶

Interference errors are systematic, not random, which makes them anticipatable through contrastive analysis of the learner's L1 and the target language (Selinker, 1972). Explicitly contrasting L1 and L2 forms converts an unconscious habit into an object of attention, and error-focused work is most effective when feedback targets the underlying pattern rather than each surface mistake Feedback is most effective at task and process levels. [+S]. Because transfer can be positive as well as negative, the goal is not to suppress the L1 but to manage when and how it is engaged [~M].

Context¶

Requirements¶

• Knowledge of the learners' L1(s) and the specific structures where it diverges from the target language (e.g., absence of articles, different phoneme inventories, word-order differences)
• Diagnostic assessment to identify which interference patterns are actually present, rather than assumed
• Explicit contrast activities that juxtapose L1 and L2 forms (Analogies, Advance Organizers, erroneous examples)
• Targeted feedback loops with opportunities for revised production (Practice, Coaching)

Constraints¶

• Contrastive analysis overpredicts: not all L1–L2 differences cause errors, and some errors arise from developmental sequences shared across L1 backgrounds [-W] — teaching every contrast wastes time and can induce errors that would not have occurred
• Heavy error correction focused on interference can raise anxiety and reduce willingness to communicate, particularly in fluency-oriented activities [-M]
• Monolingual "target-language-only" policies that ban the L1 remove a resource learners use to make sense of new input [~M]
• In multilingual classrooms with many L1s, per-L1 contrast work is impractical; group-level patterns must suffice

Implementation Variability¶

• Contrastive preview: teach the L1–L2 difference before learners meet the structure in input
• Erroneous examples: present typical interference errors for learners to diagnose and correct Erroneous examples build conceptual knowledge. [+M]
• Strategic L1 use: permit brief L1 use for meaning negotiation and metalinguistic comparison, then require L2 production
• Pronunciation-specific work: minimal-pair drills targeting phonemes absent from the L1 inventory
• Translanguaging tasks: learners compare how each language encodes a meaning, leveraging the L1 as an object of study

Target Learners¶

• Beginning and intermediate L2 learners, whose interlanguage is most strongly shaped by L1 transfer [+M]
• Learners whose L1 is typologically distant from the target language (e.g., L1 Japanese learning English articles)
• Advanced learners show less L1-driven error and benefit more from stylistic and pragmatic refinement than from interference correction [~M]
• Young learners may benefit less from explicit contrast than adolescents and adults, who can engage metalinguistically [~W]

Target Learning Goals¶

• Accuracy in high-interference structures (grammar, pronunciation, collocation)
• Metalinguistic awareness: understanding how languages differ systematically
• Self-monitoring: learners catching their own predictable L1-based errors Self-explanation improves conceptual understanding. [+M]

Instructions¶

1. Diagnose: collect writing and speech samples; identify recurring error patterns and check which are consistent with known L1 transfer patterns for the class's language backgrounds.
2. Prioritize: select the 2–3 patterns with the highest frequency and the greatest impact on comprehensibility; ignore idiosyncratic errors for now.
3. Make the contrast visible: use Analogies and side-by-side examples to show how the L1 and L2 encode the same meaning differently; erroneous examples drawn from real class errors work well Erroneous examples build conceptual knowledge. [+M].
4. Provide targeted practice: design focused production tasks that force use of the contrasted structure, with immediate Coaching during the task.
5. Give pattern-level feedback: correct the category of error ("remember — no article before plurals in general statements"), not each instance Feedback is most effective at task and process levels. [+S].
6. Position for support: during independent work, circulate near learners who struggle to follow instructions and use their names to re-engage them; brief L1 check-ins can confirm comprehension without stalling the lesson.
7. Fade: reduce explicit contrast work as accuracy stabilizes, shifting to self-monitoring checklists learners apply to their own drafts.

Related Strategies¶

• Activate Background Knowledge — the L1 is a major component of prior knowledge; activating it deliberately supports positive transfer
• Accessible Syntax — simplifying instructional language reduces comprehension load for multilingual learners
• Action-Oriented Feedback — feedback on interference patterns is most usable when tied to a concrete revision action

Examples¶

• A French L1 English class studies the false-friend pairs actually/currently and librairie/bookshop through erroneous-example diagnosis before a vocabulary quiz.
• An English pronunciation course for Arabic L1 learners uses minimal-pair listening and production drills for /p/ vs. /b/, a contrast absent in Arabic phonology.
• Duolingo tailors course content and tip notes to the learner's interface language, explicitly flagging structures that differ from the learner's L1 (e.g., English tips for Spanish speakers on ser/estar).
• A bilingual content course uses "cognate awareness" mini-lessons so Spanish L1 students leverage academic cognates (investigación → research/investigation) while avoiding false cognates.

Key Sources¶

• Lado, R. (1957). Linguistics across cultures: Applied linguistics for language teachers. University of Michigan Press.
• Selinker, L. (1972). Interlanguage. International Review of Applied Linguistics, 10(3), 209–231. doi:10.1515/iral.1972.10.1-4.209
• Odlin, T. (1989). Language transfer: Cross-linguistic influence in language learning. Cambridge University Press.
• Cummins, J. (1979). Linguistic interdependence and the educational development of bilingual children. Review of Educational Research, 49(2), 222–251. doi:10.3102/00346543049002222
• Ellis, R. (2006). Current issues in the teaching of grammar: An SLA perspective. TESOL Quarterly, 40(1), 83–107. doi:10.2307/40264512