Intake

Definition:

Intake is the subset of comprehensible input that a learner actually notices, processes, and incorporates into their developing interlanguage system. Not all input that a learner encounters becomes intake: a learner may hear or read far more language than they cognitively process in a form-focused way. The gap between input and intake represents the acquisition-critical filtering process — input must be attended to, noticed (noticing hypothesis), and processed in a way that connects form to meaning before it can become intake and ultimately contribute to acquisition. The term was introduced by Stephen Krashen and later developed and refined by other SLA researchers to address the gap between receiving language and acquiring it.

Also known as: Noticed input, processed input, acquisitional input

In-Depth Explanation

The input-intake-output pipeline.

In most models of second language acquisition, the process can be schematized as:

Input ? Intake ? Integration ? Long-term knowledge ? Output

Input: Any language the learner encounters — in reading, listening, conversation, media exposure.
Intake: The portion of input that the learner actually attends to and processes for form-meaning relationships.
Integration: Intake that connects to the learner’s existing interlanguage and is incorporated as revised or new linguistic knowledge.
Long-term knowledge: The accumulated, consolidated linguistic system.
Output: Language the learner produces, which in turn can become input for others and feedback for the self.

The intake stage is the bottleneck. A learner can be immersed in massive input with very little of it actually becoming intake if attention, motivation, and processing resources are not engaged.

What determines whether input becomes intake?

Several factors govern the input-to-intake transition:

Comprehensibility: Input at i+1 (comprehensible input) — just above the learner’s current level — maximizes the probability of intake. Input that is entirely incomprehensible cannot be processed for form-meaning mapping. Input that is far too easy may not receive form-focused attention because meaning is retrieved without engaging with the linguistic form.

Salience: Forms that are perceptually salient — phonologically prominent, high-frequency in the input, short and invariant in form — are more likely to attract attention and become intake than forms that are perceptually weak or variable.

Noticing: Schmidt’s Noticing Hypothesis proposes that conscious attention (noticing) is necessary for intake. Forms that a learner notices — even briefly — in input become intake; forms in the acoustic or visual field that are not noticed do not.

Frequency: Forms encountered many times in input eventually exceed an attention threshold and are noticed. This is why high-frequency vocabulary is typically the first to be acquired from input — it appears often enough to cross the attention threshold even without deliberate study.

Affective factors: The Affective Filter Hypothesis predicts that anxiety, low motivation, or defensive attitudes reduce the learner’s openness to processing input — effectively reducing intake by causing the learner to withdraw attention from or block incoming language.

Processing capacity: Working memory limits constrain how much linguistic processing can occur simultaneously. When a learner is concentrating on comprehending meaning, less cognitive capacity remains for form-focused processing. This is why input delivered too fast, or at too high a difficulty level, produces low intake — the cognitive demands of comprehension absorb all available processing resources.

Intake and SRS.

Spaced repetition systems can be understood as intake-maximizing machines: they present vocabulary items in conditions designed to maximize the probability that the learner notices and processes each form. The review event is specifically structured to draw attention to the form-meaning relationship (the front-of-card prompt ? recall attempt ? back-of-card answer) and the spaced scheduling ensures the item is encountered at attentionally favorable intervals. SRS effectively converts each review event into intake by design.

Beyond SRS, learners can increase intake from extensive input exposure by:

Actively marking unknown or partially known forms rather than passively reading past them.
Using input that is text-based with access to dictionary lookup — which creates conditions for form-focusing.
Keeping vocabulary logs or notebooks that require noticing and recording new forms.
Setting specific form-focused intentions before reading (“I am going to notice ?-form constructions in this text”).

Intake from interaction.

The Interaction Hypothesis provides a theory of how interaction specifically promotes intake: when communication breaks down and is repaired through negotiation of meaning, the linguistic feature causing the breakdown is highlighted and the correct form is provided in context — creating optimal conditions for intake. The learner’s attention is specifically focused on the precise feature they need to acquire, making the form-in-context sequence highly likely to become intake.

Intake vs. uptake.

Related but distinct: uptake refers to the learner’s incorporation of corrective feedback from an interlocutor into their immediate subsequent utterance. If a teacher recasts an error and the learner incorporates the correct form in their next turn, that is uptake. Uptake is a behavioral measure of short-term intake from corrective interaction; intake is the broader cognitive concept of what is processed from all input.

Common Misconceptions

“More hours of input always means more acquisition.”

Input hours and intake are not equivalent. A learner spending 200 hours in a classroom where input is incomprehensible, far above level, or processed in distracted conditions may have negligible intake. A learner spending 20 hours in well-structured comprehensible input with active noticing may have far more intake. Acquisition correlates with intake, not raw input volume.

“Immersion automatically produces maximum intake.”

Full immersion environments provide rich input but do not guarantee intake. Learners in overwhelming input environments often “shut down” — comprehension of overall meaning may be maintained while form-focused processing ceases. This is one reason intermediate learners often plateau in immersion before developing high-level grammatical accuracy: they receive input but have reduced intake of subtle grammatical forms.

“Intake happens passively if input is comprehensible.”

Comprehensibility is necessary but not sufficient for intake. The learner must also notice the specific form being acquired. Comprehensible input can be processed for meaning (bottom-up comprehension) without the linguistic form becoming intake if form-focused attention is not engaged. This is why noticing activities and focus on form interventions are valuable complements to rich input.

History

1982: Stephen Krashen introduces the concept of intake (though not the term) in discussions of comprehensible input — the idea that input must be understood and processed before it can contribute to acquisition. The term itself appears in Krashen’s writings of the early 1980s.

1967: The intake concept has earlier roots in Corder’s “The significance of learners’ errors” — Corder distinguishes between “input” (what the teacher provides) and “intake” (what the learner actually processes), noting that these are not identical and that the learner’s internal processing mediates between them.

1990: Schmidt’s Noticing Hypothesis provides the cognitive mechanism linking input to intake: noticing (conscious attention to form in input) is the proximal cause of intake. This makes noticing the key variable mediating between input availability and actual acquisition.

1990s–present: The input-intake distinction is foundational in models of the acquisitional pipeline (VanPatten’s “Input Processing” theory specifically addresses how learners allocate cognitive resources between meaning-processing and form-processing during input). Research on intake informs instructed SLA methodology for maximizing the acquisitional return on input exposure.

Criticisms

The intake concept has been criticized for its theoretical vagueness — defining intake as “what is noticed and processed” depends on empirically difficult constructs (noticing, attention, consciousness) that cannot be directly observed or measured. The relationship between noticing (necessary according to Schmidt’s Noticing Hypothesis) and intake has been examined through operational proxies (eye tracking, event-related potentials, verbal reports) but none provides a direct window into the cognitive processes claimed. The intake-to-acquisition pathway — how processed intake becomes part of the learner’s developing interlanguage — is theorized but not fully specified mechanistically.

Social Media Sentiment

The intake concept appears in language learning communities primarily through the practical question of what happens when you “hear” something in the L2 but it doesn’t seem to “stick.” The distinction between exposure and intake resonates with community experience: learners who have watched hundreds of hours of L2 content but have not acquired specific forms describe the phenomenon of intake failure without using the technical term. The implication that conscious attention (noticing) is required for form acquisition — reinforcing the value of focused vocabulary study and form-focused practice alongside comprehensible input — is widely accepted in community discourse.

Last updated: 2026-04

Practical Application

Maximize the probability of input becoming intake by: (1) building sufficient vocabulary so that unknown items stand out as noticeable against a background of comprehensible text; (2) using subtitles and transcripts that allow re-processing of specific items; (3) actively attending to target forms in reading/listening rather than processing purely for meaning. Spaced repetition vocabulary study directly targets the intake process by repeatedly drawing attention to specific form-meaning mappings.

Related Terms

Research

Corder, S.P. (1967). The significance of learners’ errors. International Review of Applied Linguistics, 5(4), 161–170.
Summary: Early paper drawing the input/intake distinction — noting that the input the teacher provides is not identical to the input the learner processes. Corder introduces the idea that intake (the learner’s internal processing of input) is mediated by the learner’s internal state and prior knowledge, establishing a foundational concept in SLA theory.

VanPatten, B. (1990). Attending to content and form in the input: An experiment in consciousness. Studies in Second Language Acquisition, 12(3), 287–301.
Summary: Experimental study of how learners allocate attentional resources between meaning processing and form processing during input. Finds that when learners must attend to both form and meaning, form processing suffers when the meaning task is cognitively demanding. Foundational for input processing models of intake.

VanPatten, B. (1996). Input Processing and Grammar Instruction: Theory and Research. Norwood, NJ: Ablex.
Summary: Comprehensive theory of input processing — the mechanisms by which learners convert input to intake. Proposes that learners primacy-process for lexical meaning over grammatical form, and that redundant or perceptually non-salient forms are not processed until clear, communicatively informative forms are handled. Directly relevant to understanding what becomes intake under different input conditions.

Schmidt, R. (1990). The role of consciousness in second language learning. Applied Linguistics, 11(2), 129–158.
Summary: Introduces the Noticing Hypothesis as the cognitive mechanism underlying intake — conscious attention to form in input is necessary (and possibly sufficient) for that form to become intake. This paper is the key theoretical link between input availability and actual acquisitional processing.