- 著者
-
広田 すみれ
- 出版者
- 日本認知科学会
- 雑誌
- 認知科学 (ISSN:13417924)
- 巻号頁・発行日
- vol.22, no.3, pp.409-425, 2015-09-01 (Released:2016-03-01)
- 参考文献数
- 42
The purpose of this study was to explore the effects of the numeracy and educationallevels on biases in five decision tasks: denominator neglect, risk-format effect in breastcancer screening risk communication, misunderstanding of correlation, framing effect,and conjunction fallacy. An internet survey was conducted with Japanese citizens inmetropolitan areas (n = 960) whose numeracy scores were previously measured by theJapanese version of Lipkus et al.’s (2001) numeracy scale, aged from their 20s to their60s with high and low educational levels. Data were analyzed based on 3 criteria ofnumeracy levels: median split (10), split according to the previous study’s criterion(9), and top-quartile (11) vs. bottom-quartile (7 and under). In the results of analysisby median split, there were no significant differences except the denominator neglect.There existed significant differences in educational levels across the three tasks. In theresults by the other criteria, there were significant differences in the tasks of conjunctionfallacy and framing effect, but those biases were rather stronger in the high-numeracygroup. The influence of the ceiling effect measuring numeracy in Japanese citizenscompared to the previous studies’ participants was discussed, as were the kinds of tasksand the difference of response by numeracy.