Summary of differences between rated chess players and non-chess players and their relations to chess skill and memory performance.

* p < .05.
** p < .01.
*** p < .001.
a Memory performance on Board 2 was employed to calculate its correlation with number of chunks and size of the largest chunks for game positions.
Average memory performance for game positions was used to calculate all other correlations.
b Age was controlled when calculating the correlations in the column of “Chess skill (USCF rating)”.
Summary of differences between rated chess players and non-chess players and their relations to chess skill and memory performance.