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class size research: grade improvements driven entirely by grade manipulation
Posted on 6/4/14 at 9:16 am
Posted on 6/4/14 at 9:16 am
Evidence from a natural experiment in Italy. LINK
Definitely not the last word in how class size should fit into education policy, but interesting IMO.
Definitely not the last word in how class size should fit into education policy, but interesting IMO.
quote:
An instrumental variables (IV) identification strategy that exploits statutory class size caps shows significant achievement gains in smaller classes in Italian primary schools...
distinguished by pervasive manipulation of standardized test scores, a finding revealed in a natural experiment that randomly assigned school monitors. IV estimates also show that small classes increase score manipulation. Estimates of a causal model for achievement with two endogenous variables, class size and score manipulation, suggest that the effects of class size on measured achievement are driven entirely by the relationship between class size and manipulation. Dishonest scoring appears to be a consequence of teacher shirking more than teacher cheating.
1
Posted on 6/4/14 at 9:22 am to 90proofprofessional
when they are graded solely on test scores there is 100% incentive to rig the scores.
Everything in life circles back to self preservation
Everything in life circles back to self preservation
Posted on 6/4/14 at 9:24 am to Mr.Perfect
quote:
when they are graded solely on test scores there is 100% incentive to rig the scores
Obviously the incentive is present (here at least), but why do you suppose the shirking action is more prevalent when the teacher has fewer students? Shouldn't one expect it to be the exact opposite?
Posted on 6/4/14 at 9:26 am to 90proofprofessional
quote:
why do you suppose the shirking action is more prevalent when the teacher has fewer students? Shouldn't one expect it to be the exact opposite?
not really. Too many people and scores for the teacher to edit. Remember these teachers arent rocket scientists. The more people you have, the harder it is to get a realistic distribution of grades through shirking. Moreover, it drastically increases the likelihood you'll get one extremely bright student who will get pissed and blab that you're giving the morons better grades with no work.
Posted on 6/4/14 at 9:29 am to CptBengal
So is having teachers with large classes being evaluated mostly by test scores potentially optimal policy?
(assuming that policy for expensive private schools is excluded here)
(assuming that policy for expensive private schools is excluded here)
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