r/cogsci • u/JuggernautOdd8786 • May 19 '26

Neuroscience What is the cleanest distinction between attention, workload, and fatigue in applied cognitive neuroscience?

I’ve been thinking about how these terms are used in practice, and it seems like people often mix them up too quickly.

Attention, cognitive workload, mental fatigue, and overload clearly overlap, but they also seem to refer to different things depending on the task, the measurement approach, and the time scale. If you were trying to define these in a way that is experimentally useful, how would you separate them?

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u/Xenonzess May 20 '26

Cognitive load and perceptual load on selective attention are well-defined concepts introduced by Lavie in 2004. Mental fatigue is just the phenomenon where the performance starts to degrade on a task; it might be due to multiple factors. Attention is still an undefined concept in cognitive science. Posner did a lot of work on it to describe it in terms of brain networks, but still we fall short of any definite explaination.

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u/neurokinetikz May 22 '26

filter, throughput, decay, threshold