First they had to study different behaviors to find out which ones stongly predict whether your mind is interrupted.
The potentialbusynesssignals they focused on included whether the office doors were left open or closed,the time of day,if other people were with the person in question,how close they were to each other, and whether or not the computer was in use.
The sensors monitored these and many other factors while four subjects were at work . At random intervals,the subjects rated how interruptible they were on a scale ranging fromhighly interruptibletohighly notinterruptible . Their ratings were then correlated with the various behaviors . It is a shotgun(随意的)approach:we used all the indicators we could think of and then let statistics find out which were important, says Hudson.
The model showed that using the keyboard,and talking on a landline or to someone else in the office correlated most strongly with how interruptible the subjects judged themselves to be.
Interestingly,the computer was actually better than people at predicting when someone was too busy to be interrupted . The computer got it right 82 per cent of the time,humans 77 per cent.
Fogarty speculates that this might be because people doing the interrupting are inevitably biased towards delivering their message,whereas computers dont care.
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