.@skinnerlayne what's the theory behind pupil diameter as a measure of alertness/energy/focus?
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@vgr I've been told that how many times you can tap the space bar in a set period is a good test of alertness, but I can't find any sources. - End of conversation
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@vgr pupil diameter ?Thanks. Twitter will use this to make your timeline better. UndoUndo
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@vgr beyond reaction time http://www2.psychology.uiowa.edu/faculty/mordkoff/pdfs%5CMatchock%20&%20Mordkoff%202007%20(EBR%20178).pdf … some people think temperature is a proxy http://www.ncbi.nlm.nih.gov/pubmed/12388468Thanks. Twitter will use this to make your timeline better. UndoUndo
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@vgr I've seen software that purports to measure thisThanks. Twitter will use this to make your timeline better. UndoUndo
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@vgr The trouble is taking merely the measurement will require attention that diminishes your level of alertness.Thanks. Twitter will use this to make your timeline better. UndoUndo
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@vgr heart rate variability, 2nd order effect might be more relevant.Thanks. Twitter will use this to make your timeline better. UndoUndo
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