Brand Robins One of the most common effects of cognitive load has to do with maintaining load over time erodes our decision-making abilities.
The study I read specifically used food choices when studying cognitive load. Folks who were under more load throughout the day experienced less ‘willpower’ to choose healthy food options at the end of the day.
In gameplay, that may be how cognitive load of a game manifests: we get the munchies. Or… maybe we get more impulsive and improv more than we would have, had we had less load.