But note that in this study the beta wave activity turned on and off in task-sensitive ways. It may not be useful to have some stimulus that increases or decrea

But note that in this study the beta wave activity turned on and off in task-sensitive ways. It may not be useful to have some stimulus that increases or decreases beta wave amplitude in ways that are not sensitive to exactly what your brain needs at that very moment. I mean, imagine you were investigating a CPU and found a pin that went high when the CPU wanted to write to memory. You wouldn't think "yeah, remembering shit is awesome, let's connect this to Vcc". No, that pin is only supposed to go high at specific times depending on exactly what the CPU is doing.