Figure 1. Sub-graph analysis of a co-occurrence network among the words used in the reports of the teachers about the workshop. Each color indicates a cluster of words (topic) used closely in sentences. By referring to the hierarchical cluster analysis, the blue cluster (05) was not considered as one topic because it included auxiliary verbs (be and have) connected with multiple topics. The following five topics were extracted: 01 “new findings,” 02 “subject selection,” 03 “expressing opinions,” 04 “rethinking community,” and 06 “time constraints.”
Figure 2. Correspondence analysis of teachers’ opinions about the training: differences by past attendance. A short distance between words indicates that these are used close together in sentences and that between-group labels indicate their similarities. Words that appear on the opposite side of the contrasting group are characteristic of the target group.