Page 5 - R_EdQuire White Paper Nov 2017 v3.4

EdQuire White Paper: Computer learning behaviour in K-12
Nov 2017 V3.4
Page 5 of 15

The Distractibility Index
Off task time, as well as frequent task-switching contribute to distraction (Kraushaar and Novak 2010). We
thus defined a Distractibility Index (DI) as a ratio of time On-Tasks (Green, Blue or Orange educategories),
versus time Off-Task (Red) weighted by the number of activity switches between the two. This index ranges
from 0 (no distraction) to 1 (completely distracted). See Appendix for details of the formula.

2.3 Active computer use in lessons

Method
The average time computers were used in lessons was calculated from all lessons with significant computer
use, defined as at least 2 minutes.

Result
Computers were used in 84% of lessons for at least 2 minutes. Figure 1a shows the distribution of lessons by
computer use time across the four schools. Seventy six percent of lessons were 40 minutes in duration, the
remainder were 50 minutes. There is an even distribution of active computer use time from 1 to 29 minutes
per lesson with an average of 20 minutes, representing 5% of lesson time where computers were used and
38% of all student lesson time

Figure 1a: Distribution of lessons by computer usage time

Discussion
The relatively high 5% spent on active computer use in classes where computers were used is consistent with
anecdotal reports from teachers. The relatively flat, non-normal distribution of computer use in lessons
probably reflects the non-homogeneity of the lesson subjects. Further analysis by subject and by year grade
may be useful in characterising this differential use of computers.

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