domingo, 16 de septiembre de 2012

ERROR CORRECTION



ERROR CORRECTION


Students make mistakes, even during carefully planned lessons using well-designed instructional materials. They answer incorrectly, give incomplete answers, or do not respond at all. The importance of providing feedback when students make errors is well documented (e.g., Brophy, 1986; Christenson, Ysseldyke, & Thurlow, 1989). Nevertheless, relatively little experimental research on error correction exists, and what does exist is inconclusive. Teachers are left knowing the importance of correcting student errors but receiving little empirically supported guidance for how to do so. 

What to do when student make a mistake? 

Don’t Let Students Practice Errors during the Acquisition Stage of Learning

Students learn by doing, but if errors are repeated, they may be learning how to perform skills incorrectly. Students learn better by “doing with feedback.” The biggest problem with delayed feedback is that it allows students to practice errors (Van Houten, 1984). Practicing errors also wastes valuable instructional time because of the re-teaching and relearning that eventually must take place. Most errors are made during the acquisition stage of learning, when the student is learning how to perform a new skill or to remember and use new knowledge correctly. It is important that feedback be provided before the student is required to use the skill/knowledge again. Feedback should be qualitative, focusing on the accuracy of the student’s response. 

For example: “Excellent, Robin. You removed all of the leaves with dark spots. But there’s still too much sand on them to serve to our customers. Let me show you again how to wash it off. Then you can show me.” For behaviors that produce a permanent product (e.g., a completed workbook page, a sanded piece of wood), it is usually not critical that feedback occur within a few seconds or minutes of a student’s response. Feedback received even a day or two later may still be helpful as long as it occurs before the student must respond again. Teachers can ensure that students receive feedback after each response by using instructional strategies such as these:


Collaborative learning. Use a peer tutoring system or small-group activities in which peers provide feedback to one another after each response (Miller, Barbetta, & Heron, 1994).

Learning centers. Use instructional materials and computer software that provide feedback after each response.

Self-correction. Teach students to self-score their work and self-correct any errors before proceeding to the next problem or item (Goddard & Heron, 1998; Morten, Heward, & Alber, 1998).

Homework. Avoid assigning homework or independent seatwork activities that do not contain self scoring and self-correcting components until the student can perform the target skill with some accuracy. 



When Errors Occur, Provide Effective and Efficient Error Correction

When handled properly, errors can provide good opportunities for teaching and learning. But too often error correction is carried out ineffectively (the student is still wrong the next time) and inefficiently (it is time-consuming and reduces the total number of learning trials that can be conducted during the lesson). Although much remains to be learned about how teachers should respond when students make mistakes during instruction, the combined results of several experimental studies provide some guidance. Research suggests that error correction will be more effective and efficient when it includes these four characteristics:

Now Instead of Later. Errors should be corrected before going to the next item or problem. Teachers may hesitate to delay instruction when a student errs during group instruction, preferring instead to work individually with her after the lesson. But this may allow the student to make the same mistake for the rest of the lesson. Two recent studies compared “right now” and “end-of-the-lesson” error correction during sight-word lessons with primary students with mental retardation and science vocabulary lessons with upper elementary-age students with learning disabilities. Error correction immediately after each error was more effective, even when the post lesson error correction consisted of repeated trials (Barbetta, Heward, Bradley, & Miller, 1994; Kleinman et al., 1994).


Direct. Error correction is direct when the feedback focuses on the target skill. Several studies have shown that the effectiveness of error correction is improved when students are provided with complete information or a direct model of the missed item (Barbetta, Heward, & Bradley, 1993; Espin & Deno, 1989). That is, instead of offering incomplete or indirect feedback, tell, show, and/or guide the student through the correct response.

Brief. The teacher should rapidly tell, show, and/or demonstrate the correct response (e.g., “This word is ‘circus.’ ”). Correcting an error in 3 or 4 seconds is better than engaging in an extended discussion of the student’s mistake. In trying to help students understand their error, teachers often spend a great deal of time talking. Although detailed explanations are sometimes necessary and helpful, often students just get confused or lose interest. Time would be better used conducting several more complete learning trials.

Ends with the Student Making the Correct Response. When a student errs, teachers often hint, probe, tell, show, and eventually provide the correct response or ask another student to answer. The student who made the original error passively observes. Results from several studies show that feedback is more effective when the student who erred is given an opportunity to emit the corrected response (Barbetta & Heward, 1993; Dalrymple & Feldman, 1992; Drevno et al., 1994). For example, Barbetta, Heron, and Heward (1993) examined the effects of active student response during the correction of errors made by primary students with mental retardation during sight-word lessons. Half of each week’s set of 20 unknown words were taught with “no response” (NR) error correction (after each error, the teacher modeled the correct response while the student looked at the word); the remaining 10 words were taught with “active student response” (ASR) error correction (the student repeated the word after the teacher’s model). ASR error correction was more effective for all six children on all five measures of performance: number and percentage of correct responses during instruction, same-day tests, next day tests (see Figure A), maintenance tests given 2 weeks after instruction, and words read in sentences.

The error correction episode should end with the student making the correct response. Instead of providing or showing the correct response and then asking the student, “Now do you understand?” have the student repeat the correct response (e.g., teacher: “No. This word is ‘circus’. What is this word?”  student: “Circus.” Teacher: “Good.”).


Error Correction Techniques.

A really important skill for ESL or EFL teachers is error correction. There is a fine balance needed to maintain lesson flow and develop student’s confidence. It is easy to tip this balance and the results are disastrous for your students. Over-correction will result in students losing confidence and then always speaking hesitantly, often “stuttering” and always looking to the teacher for confirmation. Under-correction will result in students developing bad habits and not learning proper grammar, forms, usage; eventually decreasing communicative ability.
The first step is learning whether to correct or not. A key to developing this skill is to understand the difference between ‘errors’ and ‘mistakes’ (TESOL and TEFL courses focus a lot on this differentiation). A mistake is a slip up: you know the correct thing to say, but by accident said the wrong thing. Often mistakes result in fun statements and students can get a kick out of them. Mistakes are not critical to correct. If you identify that it was a simple mistake, let it go. If it is repeated too often, it has become an error. Errors are when the student does not know the correct form, term, or usage. Errors need to be corrected for students to develop their skills and to avoid developing bad habits.
Once an error has been identified, teachers need to consider the type of error and how best to deal with it.
Jim Scrivener (1994) writes:
1. Decide what kind of error has been made (grammatical? pronunciation?, etc.).
2. Decide whether to deal with it (is it useful to correct it?).
3. Decide when to deal with it (now? end of the activity? later?).
4. Decide who will correct (teacher? student self-correction? other students?).
5. Decide on an appropriate technique to indicate that an error has occurred or to enable correction.
In order to make the decisions above, we must hone our skills. The bigger our knowledge base, the easier to make these decisions, the better we can deal with them. Some suggested error correction techniques are explained below. 


On the Spot (Selective)
On the spot can be dangerous to your students’ confidence. Do so with caution and not too often, and choose an appropriate technique that doesn’t slow down the pace too much. Be careful not to ‘jump’ on one student for making a mistake.
Echo the Error: Quick and easy, be an echo to your student’s error.
Ask for Repetition: Just say “please repeat” or “please say that again”.
Repeat up to the Error: Echo up to the error; let it hang for students to finish...
Ask a Question: Highlight student’s error by asking a question that will expose the error.
Provide Options: Without stopping the flow of the lesson, write options on the board.
Gestures: Especially useful with phrasal verb and preposition mistakes.
Write on the Whiteboard, Underline: The standard whiteboard technique. Highlight the error with an underline.


Delayed Error Correction (After)
At an appropriate stop in the lesson, do some error correction. A good place to do this is at the end of a section, practice, or activity (error correction makes a nice transition between parts of the lesson). Don’t make student’s feel bad about their errors; they often don’t know the correct thing to say. Instead of saying “You said ~”, say “I heard ~” or just simply write the error(s) on the board. When possible, change the sentence for anonymity; we don’t want to embarrass students.
Echo the Error: “I heard ~”
Ask for Reformulation (questions): Can you change this question to get the same answer?
Repeat up to the Error: good for vocabulary errors, write the sentence on the board up to the error, have students finish the sentence. This can be done with all students, thus re-enforcing the correct form to be used by hearing several variations.
Ask a Question: Good for concept checks and getting students to repeat a section where they made an error, simply ask them a question that will bring up the error. The question can be directed at any student or all students.
Repetition of the Correct Answer: Once the error has been corrected, have students repeat the correct answer. This technique works best with low level students or when the error seems to have become a bad habit.
Provide Options: Write the error on the board and provide several options. Have students choose the option they think is best.
Use a Visual Aid: Draw a timeline, pie chart, picture or other visual aide on the board to help students to understand the error. Have them self-correct.
Write on the Whiteboard, Underline: The standard white board technique. Highlight the error with an underline. 
Highlight the Issue:Rather than bringing up a specific error, when you notice repeated errors of the same type, highlight this issue and discuss. If necessary, mark students’ files and teach the appropriate curriculum item as soon as possible.



Other Technique Notes
Here are a few other notes to help you develop your error correction techniques.
Anonymous Error Correction: With delayed error correction, try to make the correction anonymous. For a grammar mistake, try changing the nouns so that the sentence is unidentifiable by students but still helps them learn their mistake. For example: if a student said “Yesterday, I go to Kyoto”, change it to “Last week, I go to Daimaru”. Also say “I heard…,” rather than “Mr Suzuki said….” This anonymity will help students feel more confident by not highlighting a specific student’s mistake in front of peers. All students will benefit from this consideration as all students will be curious to fix the mistake, not knowing who made it originally.
Self Correction: As much as possible try to encourage self-correction. If students can fix their own mistake, it shows that they understand and allows them to feel more confident in their knowledge. Confident self-correction habits lead to students depending less on others (i.e. their coach) and thus speaking more freely, knowing if they make a mistake they can correct it themselves. They will become more confident speaking outside of the classroom, which is the true goal of ESL and EFL education.
Peer Correction: Above we saw numerous techniques which allow students to work together to correct errors and avoid individual error correction. Coaches should further encourage students to correct each other (peer correction). Peer correction will increase student talk time and also increase student interaction. This is particularly easy to do with homework and written work, but can be done on the spot and with delayed correction on the board. 

 REFELECTION:

Error Correction is not a difficult part in our lessons, but not also is easy. We know many error correction techniques, so we can use it our classes, but we have to keep in mind that we must find the way and the moment to do the correction. Students will feel confortable if they know that makes error is normal in their learning.