Researched Based Best Practices in the Classroom
What is the difference between comprehensible input and the zone of proximal development?
i +1 deals with adjusting speech or writing to the learner’s linguistic competence; view of learner as autonomous: input is processed in the brain (if the input is mostly comprehensible, the LAD will figure out the rest). Some argue that Krashen was influenced by Vygotsky.
ZPD deals with adjusting teaching (scaffolding) to help the learner reach a new competence; view of learner as a social being and learning as social process
Dunn and Lantolf (1998) argue that the two are so distinct as to be incommensurable. [Incommensurable–“the impossibility of translating from the language of one scientific theory or conceptual framework into the language of another, rival theory or framework” (Pearce, 1987).]
“The i+1formula, then, represents what will be acquired next, not what is in the course of maturing. Acquisition for all intents and purposes involves moving from one actual developmental stage to the next, with no attention given to the ripening process, which plays a central role in Vygotsky’s thinking (see Aljaafreh &Lantolf, 1994). Krashen saw move-ment from one stage of interlanguage competence to the next as ultimately a fixed and predictable process, independent of cultural and historical influences. Thus, for Krashen, an individual’s linguistic future is certain; for Vygotsky, the future is open, uncertain and depends on the material and interactional (i. e., cultural and historical) circumstances in which the individual is situated” (Dunn and Lantolf, 1998).
Research that supports the Interaction Hypothesis
Pica, Young & Doughty (1987)
Izumi (2002)
Mackey (1999)
Research that supports the Output Hypothesis
Izumi (2002)
Swain & Lapkin (1994)
These studies support the ZPD.
Nassaji & Swain (2000)
Hosada (2006)
Mackey & Philp (1998) [recasts work when within the ZPD]
These studies support Explicit Metalinguistic Feedback
Lyster & Ranta (1997)
Ellis, Loewen & Erlam (2006)
“instructed second language acquisition”
R. Ellis, 1990 Spada, 1997 Norris & Ortega, 2000 Cook, 2001 Lyster, 2001 Robinson, 2001 Doughty, 2003
“instructed second language acquisition”
R. Ellis, 1990 Spada, 1997 Norris & Ortega, 2000 Cook, 2001 Lyster, 2001 Robinson, 2001 Doughty, 2003