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3

Quantitative methods

1. User performance data collection

data is collected on system use

frequency of request for on-line assistance

what did people ask for help with?

frequency of use of different parts of the system

why are parts of system unused?

number of errors and where they occurred

why does an error occur repeatedly?

time it takes to complete some operation

what tasks take longer than expected?

collect heaps of data in the hope that something interesting shows up

often difficult to sift through data unless specific aspects are targeted

as in list above

descriptive statistics

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