@article{oai:stars.repo.nii.ac.jp:00009503,
 author = {中西, 啓喜 and NAKANISHI, Hiroki},
 issue = {2},
 journal = {桃山学院大学社会学論集, ST.ANDREW'S UNIVERSITY SOCIOLOGICAL REVIEW},
 month = {Feb},
 note = {Class size reduction is a hot topic in policy．Since2021，elementary
schools will gradually be phased in to35students per class for all grades．
However，most sociological studies examining the effects of class size
have been set on students，such as the correction of academic
achievement gaps．It is not only students who are affected by the
reduction in class size，but teachers as well．In particular，it would be
meaningful to examine whether the reduction in class size has a positive
effect on the busyness of teachers，which has become a social issue in
recent years．Therefore，I will empirically clarify the question “Does class
size reduction reduce teacher work hours? “by analyzing elementary school
teacher data from TALIS2018．
In this paper，I used decision tree analysis as the analysis method．By
using decision tree analysis，it is possible to extract non-trivial information
from the data．The analysis of constructing hypotheses from previous
studies and testing them is often prone to manipulation，but it is expected
that decision tree analysis can present findings that have not been obtained
before．Furthermore，decision tree analysis can be read like a flowchart，
making it easy to interpret the results．Therefore，even non-experts can
easily interpret the results of the analysis，and the knowledge can be
easily shared between experts and non-experts．
The following two findings were obtained from the analysis．（1）The
smaller the class size，the shorter the working hours of the teachers．（2）
There is no statistical relationship between teachers’working hours and
the number of children with low Socio-economic status in their classrooms．
Japanese schools do not have as many students with economically
difficulties，students with limited native language skills，or immigrant and
refugee students as their European counterparts．Nevertheless，if the
working hours of Japanese teachers are the longest in the world，it is a
problem of work culture．Solving “child poverty” is a very important
social problem，however perhaps even if this problem is solved，the
busyness of teachers will not go away．A fundamental reconfiguration of
the work culture of teachers is needed．},
 pages = {117--136},
 title = {学級規模縮小は教師の労働時間を短縮するのか？ : 決定木分析を用いたデータマイニングによる検証},
 volume = {55},
 year = {2022},
 yomi = {ナカニシ, ヒロキ}
}