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Science of Chess - Eyetracking, board vision, and expertise (Part 2 of 2)

@Danjyboi said in #10:

I’m a bit late but does anyone have that spoiler for the visual change puzzle?

the busy one. I though I did long ago. but now I don'T recall. or never did.

@Danjyboi said in #10: > I’m a bit late but does anyone have that spoiler for the visual change puzzle? the busy one. I though I did long ago. but now I don'T recall. or never did.

@Danjyboi said in #10:

I’m a bit late but does anyone have that spoiler for the visual change puzzle?

I can help with that: In the lower-right quadrant, there is a green-yellow blossom that vanishes and reappears.

@Danjyboi said in #10: > I’m a bit late but does anyone have that spoiler for the visual change puzzle? I can help with that: In the lower-right quadrant, there is a green-yellow blossom that vanishes and reappears.

I noticed other changes in the pictures:

In the picture with the globe there are two additional changes, I think: a person and a building are also disappearing, or am I wrong?

And in one ear of the bunny one of the dark spots is replaced by a green one?

I noticed other changes in the pictures: In the picture with the globe there are two additional changes, I think: a person and a building are also disappearing, or am I wrong? And in one ear of the bunny one of the dark spots is replaced by a green one?

@SlowZenPlayer said in #13:

I noticed other changes in the pictures:

In the picture with the globe there are two additional changes, I think: a person and a building are also disappearing, or am I wrong?

And in one ear of the bunny one of the dark spots is replaced by a green one?

Good eye! Yes, those do seem to be additional changes in the first example. As for the bunny, I don't see the dark/green switch, but perhaps others do? Thanks for reading!

@SlowZenPlayer said in #13: > I noticed other changes in the pictures: > > In the picture with the globe there are two additional changes, I think: a person and a building are also disappearing, or am I wrong? > > And in one ear of the bunny one of the dark spots is replaced by a green one? Good eye! Yes, those do seem to be additional changes in the first example. As for the bunny, I don't see the dark/green switch, but perhaps others do? Thanks for reading!

After I read #12 I can't believe I did not see the blossom disappear :(
And regarding the dot in the bunny's left ear, now I think it is simply an artefact from generating the gif-file.

After I read #12 I can't believe I did not see the blossom disappear :( And regarding the dot in the bunny's left ear, now I think it is simply an artefact from generating the gif-file.

Why does the visual span (number of squares) decrease for intermediate players compared to novices? I expected a steady increase, where experts would have the largest visual span, followed by intermediate players, and then novices.
Figure 3 from Reingold et al. (2001) shows that experts have a much larger visual span than weaker players.

Why does the visual span (number of squares) decrease for intermediate players compared to novices? I expected a steady increase, where experts would have the largest visual span, followed by intermediate players, and then novices. Figure 3 from Reingold et al. (2001) shows that experts have a much larger visual span than weaker players.

@kinglovesqueens said in #16:

Why does the visual span (number of squares) decrease for intermediate players compared to novices? I expected a steady increase, where experts would have the largest visual span, followed by intermediate players, and then novices.
Figure 3 from Reingold et al. (2001) shows that experts have a much larger visual span than weaker players.

I just took a quick look at the paper, and it looks like the intermediate players' visual span is not significantly smaller than novices. Experts' span is bigger than both of them, but that small numerical difference in the graph isn't statistically meaningful. Hope that helps!

@kinglovesqueens said in #16: > Why does the visual span (number of squares) decrease for intermediate players compared to novices? I expected a steady increase, where experts would have the largest visual span, followed by intermediate players, and then novices. > Figure 3 from Reingold et al. (2001) shows that experts have a much larger visual span than weaker players. I just took a quick look at the paper, and it looks like the intermediate players' visual span is not significantly smaller than novices. Experts' span is bigger than both of them, but that small numerical difference in the graph isn't statistically meaningful. Hope that helps!

Your explanation is very helpful—thanks for the quick response! With a larger sample size, if I were to repeat the experiment today as described in the paper, I should expect to see a steady increase in visual span ( and decrease in reaction time) from novices to intermediate players to experts, isn't it? (This is just my intuitive guess -unlike the Einstellung effect, where experts remain unaffected while intermediate players are influenced )

Your explanation is very helpful—thanks for the quick response! With a larger sample size, if I were to repeat the experiment today as described in the paper, I should expect to see a steady increase in visual span ( and decrease in reaction time) from novices to intermediate players to experts, isn't it? (This is just my intuitive guess -unlike the Einstellung effect, where experts remain unaffected while intermediate players are influenced )