Average task times in usability tests: what to report?
Average task times in usability tests: what to report?
复制标题
可用性测试中的平均任务时间:报告什么?
DOI:
--
复制
发表时间:
2010
期刊:
影响因子:
--
通讯作者:
James R. Lewis
中科院分区:
文献类型:
--
作者:
Jeff Sauro;James R. Lewis
The distribution of task time data in usability studies is positively skewed. Practitioners who are aware of this positive skew tend to report the sample median. Monte Carlo simulations using data from 61 large-sample usability tasks showed that the sample median is a biased estimate of the population median. Using the geometric mean to estimate the center of the population will, on average, have 13% less error and 22% less bias than the sample median. Other estimates of the population center (trimmed, harmonic and Winsorized means) had worse performance than the sample median.
DOI:
10.1037/0096-1523.14.3.539
发表时间:
1988-08-01
影响因子:
2.1
作者:
MILLER, J
通讯作者:
MILLER, J