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Confidence is Key

blindfoldedchris

From my personal experience, I think you may even see the exact opposite, depending on your student. Some people look at ratings, and don't take that person seriously. Perhaps the personality of your subject will affect it. Either way, should be fun to see! (If you need an opponent to help out, lmk)

From my personal experience, I think you may even see the exact opposite, depending on your student. Some people look at ratings, and don't take that person seriously. Perhaps the personality of your subject will affect it. Either way, should be fun to see! (If you need an opponent to help out, lmk)
mag_mag

that very good

that very good
Antifraudcheck

I used chess insights by lichess to enlighten this question. (partly)

The quantitative measure of "centipawn loss" seems to provide an answer this query, as it appears to be a measure of an objective variable comparative to perfect play as evaluated by the engine, i.e. the difference between the evaluated play and "optimal" play.

It turns out that I have on average 10% less centipawn loss against a weaker opponent.

So in my personal experience, playing vs weaker players does create better play, objectively.

Of course, this would not measure the subjective perception of the player.
Would the outcome differ in case the player was not aware of the exact difference, or somehow lead to believe otherwise ?

The methodology would require a long term evaluation, setting baselines, creating representative samples, creating false accounts by better and/or worse players, which seems to be violating the Terms of service of nearly all chess websites, and hence hard to ascertain.

Good luck !

I used chess insights by lichess to enlighten this question. (partly) The quantitative measure of "centipawn loss" seems to provide an answer this query, as it appears to be a measure of an objective variable comparative to perfect play as evaluated by the engine, i.e. the difference between the evaluated play and "optimal" play. It turns out that I have on average 10% less centipawn loss against a weaker opponent. So in my personal experience, playing vs weaker players does create better play, objectively. Of course, this would not measure the subjective perception of the player. Would the outcome differ in case the player was not aware of the exact difference, or somehow lead to believe otherwise ? The methodology would require a long term evaluation, setting baselines, creating representative samples, creating false accounts by better and/or worse players, which seems to be violating the Terms of service of nearly all chess websites, and hence hard to ascertain. Good luck !