Language Learner Errors

Definition:

Language learner errors are systematic, non-target-like forms produced by learners that deviate from target language (TL) norms in predictable ways. Since Corder’s (1967) landmark paper “The Significance of Learners’ Errors,” errors have been reconceived not as failures to learn, but as evidence of the learner’s current interlanguage (IL) system. Error analysis — the systematic description, classification, and causal interpretation of learner errors — is a central methodology in SLA research. Distinct from mistakes (performance slips the learner can self-correct), errors reflect genuine gaps in developing TL competence.

Errors vs. Mistakes

A foundational distinction (Corder, 1967):

In practice, distinguishing errors from mistakes requires multiple elicitation contexts. A pattern that the learner cannot correct upon prompting across several trials is classified as an error.

Sources of Learner Errors

1. Negative transfer (interlingual errors)

Errors caused by applying L1 patterns to the TL:

• Spanish speaker: “I have 25 years” (Spanish Tengo 25 años ? English literal translation)
• Japanese speaker: “I yesterday the book read” (SOV word order)

2. Developmental errors (intralingual errors)

Errors caused by the learner’s application of TL rules to inappropriate contexts — they would be made by learners of any L1:

• Overgeneralization: “She goed” (applying regular past rule to irregular verb)
• Simplification: omitting obligatory morphemes (“He go”)
• False analogy: “I am agree” (extending copula pattern)

3. Overgeneralization — see the dedicated entry

Overgeneralization is a subtype of developmental error: the learner extends a TL rule to contexts where it does not apply. This is evidence of active hypothesis-testing, not random failure.

4. Communication strategies

Learners may borrow from L1, coin new words, or paraphrase when they lack the TL form. These produce non-target forms that are strategic rather than reflecting mislearned rules.

5. Induced errors

Errors induced by teaching methods, textbook presentations, or teacher corrections that model non-target forms.

Error Analysis Methodology (EA)

Steps in EA (Corder, 1974; Ellis, 1994):

1. Collect learner data — written or spoken samples under natural conditions
2. Identify errors — mark non-target forms (both obligatory occasion errors = omissions, and errors of commission = wrong forms)
3. Classify errors — by linguistic domain (phonological, lexical, grammatical, pragmatic) and source (interlingual, intralingual, induced)
4. Explain errors — psycholinguistic and sociolinguistic explanations
5. Evaluate gravity — assess which errors impede communication (global errors) vs. which are local/minor (local errors)

Global errors violate overall message comprehension (“No very like I this song”). Local errors affect only one element and are usually still interpretable (“She go to school yesterday”).

Error Gravity and Pedagogical Response

Not all errors require equal attention. Research on error evaluation (Lennon; Sheen) suggests:

• Native speakers judge lexical errors as more disruptive than grammatical errors
• Phonological errors that cause misunderstanding are more serious than minor accent features
• Pragmatic errors (inappropriate politeness, directness) can cause social damage even when grammatically correct

For teaching, recasts and other forms of implicit corrective feedback are used to address errors without disrupting communicative flow; explicit correction is used for persistent high-priority errors.

Error Analysis vs. Contrastive Analysis

Modern approaches combine CA and EA, supplemented by IL theory.

History

Pre-1960s: errors were seen as bad habits to be suppressed (audiolingual/behaviorist view). Corder (1967) “The Significance of Learners’ Errors” reframed errors as evidence of systematic IL knowledge. Richards (1971) classified intralingual errors. Selinker (1972) formalized interlanguage. Ellis (1994) provided a comprehensive EA methodology. Later research integrated Error Analysis with corpus linguistics and learner corpus research (Granger, 1990s–2000s).

Common Misconceptions

• “Errors should be corrected immediately and consistently” — Timing, type, and focus of correction depends on the pedagogical goal and learner’s developmental stage; premature correction of developmental errors may have limited effect
• “Fewer errors = more proficiency” — Advanced learners may produce fewer errors in simple tasks but make characteristic advanced-level errors in complex tasks

Criticisms

• EA focuses on what learners get wrong, not on what they successfully avoid (avoidance strategies)
• Classifying error sources as “interlingual” vs. “intralingual” is often ambiguous in practice
• Learner corpus research has partly replaced EA as the primary methodology for studying non-native forms

Social Media Sentiment

Language learners discuss errors broadly — both as embarrassments (production anxiety) and as humor (funny mistakes). The “errors are normal” message is frequently promoted by SLA-informed content creators. Last updated: 2026-04

Practical Application

• Treat your own errors as data: identify patterns in what you consistently get wrong and address the underlying gap
• Keep a personal error log — write down persistent errors and track whether they decrease over time
• Practice with real output (speaking and writing) to generate errors that reveal your IL gaps; silence produces no data

Related Terms

• Interlanguage
• Negative Transfer
• Overextension
• Corrective Feedback
• Recasts
• Contrastive Analysis

See Also

• Sakubo

Research

• Corder, S. P. (1967). The significance of learner’s errors. IRAL, 5, 161–170. — Foundational reconceptualization of errors as windows into interlanguage systems.
• Richards, J. C. (1971). A non-contrastive approach to error analysis. English Language Teaching, 25, 204–219. — Classification of intralingual and developmental errors.
• Ellis, R. (1994). The Study of Second Language Acquisition. Oxford University Press. — Comprehensive methodology for Error Analysis (Chapter 2).