The Sandhi Key Dispute: Form Marks vs Label Marks
You convene the scrutiny panel for the grammar section of a 100-mark second-year preparatory examination taken by 186 candidates across four centres. Item 3 carries 8 marks: candidates must join four word pairs and name the type of புணர்ச்சி for each - மண் + குடம், கல் + தூண், பூ + கொடி, மரம் + வேர். The approved key reads மட்குடம், கற்றூண், பூக்கொடி, மரவேர், each labelled விகாரப் புணர்ச்சி, two marks per pair (one for the joined form, one for the label). Scrutiny surfaces three problems. Thirty-one scripts wrote மண்குடம், கல்தூண், பூகொடி, மரம்வேர் and labelled all four இயல்பு. Two evaluators marked every one of those four pairs wrong; a third awarded full marks, arguing that the intended meaning is unmistakable and that the candidates are 'only weak in terminology'. Eleven further scripts produced all four correct forms but labelled them இயல்பு. Nine scripts gave mixed answers, some pairs correct and some not. You must settle the marking rule before results are uploaded tonight.
1. Rule on the evaluator who awarded full marks on the ground that the meaning is clear. What is your decision, and how do you protect consistency across the remaining scripts?
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Overrule that evaluator, but correct the reasoning in writing. The item is a two-construct item: forming the joined word, and naming the process. 'The meaning is clear' is not a criterion in the key, and it cannot be, because மண்குடம் is not a Tamil word at all - it is the pair copied out unjoined. A candidate who writes that has failed the first construct as well as the second, so there is nothing to salvage with a sympathy mark. The 8 marks stand at 0.
The evaluator's instinct is not worthless: do not dock marks elsewhere for the same misconception, since that punishes one error twice and is the commonest cause of successful revaluation. But the diagnosis matters. All 31 scripts label all four pairs இயல்பு, which is systematic, not a slip - the rule was never learned, and the mark should stay at zero while the item analysis records the cause. Ask that evaluator to re-check their other scripts tonight for the same leniency before upload.
2. Fix the score for the eleven correct-form/wrong-label scripts and for the nine mixed scripts. Justify the split pair by pair.
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Score the eleven at 4/8; score the nine pair by pair, never holistically.
The two marks are not one judgement. A candidate who writes மட்குடம், கற்றூண், பூக்கொடி, மரவேர் has demonstrated the orthographic rule - the harder half of the item - and failed only the terminology. Award 1 per correct form, 0 per label: 4 out of 8.
For the mixed scripts, apply the same two-mark unit to each pair separately. Do not average them into an impression mark, because the item analysis then loses the only useful information in the paper. Expect clusters: a candidate who gets மட்குடம் right but writes மரம்வேர் has failed specifically on a vowel-initial join, where a glide வ் must appear. That is a narrower gap than 'weak at sandhi' and the remedial class should target it narrowly. Record the pattern in the item analysis.
3. Write a one-line rule for the panel's erratum sheet that distinguishes இயல்பு from விகாரம் for these four pairs, and show it working on each pair.
Read the worked answer
Erratum line: 'Write the two source words, write the joined word, and compare letter by letter. If a letter changed, a new letter appeared, or a letter dropped, it is விகாரப் புணர்ச்சி; if nothing changed, it is இயல்பு.'
Applied here: ண் → ட் in மட்குடம் and ல் → ற் in கற்றூண் - both திரிதல், a letter changed. க் appears in பூக்கொடி and வ் appears in மரவேர் - both தோன்றல், a letter appeared. All four are therefore விகாரம், and the key is internally consistent.
The same line disposes of the candidate objection 'இயல்பு, because the meaning survives': இயல்பு is defined by the letters, not by the sense. Post the line in every classroom before the next unit, since what failed in this paper was the rule, not the individual vocabulary.