
| Subject   | #                                                                                                           | Answers                                                                                                  |
|-----------|-------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------|
| Q2        | I don't like persons as a motif.                                                                            |                                                                                                          |
| 59        | Q3                                                                                                          | Understandable abstractness, warm colors, and landscape motifs are relevant to my preference.            |
| Q4        | The same as the Q3.                                                                                         |                                                                                                          |
| Q2        | Composition, rather than color, governs the comforts I feel.                                                |                                                                                                          |
| 66        | Q3                                                                                                          | Motifs are not relevant to my preference. I don't like the art works like commercial posters.            |
| Q4        | Flow of lines or paintbrushes determines the comforts I feel.                                               |                                                                                                          |
| Q2        | I can't imagine the art works which I dislike.                                                              |                                                                                                          |
| Q3        | I noticed that I have preference than I expected.                                                           |                                                                                                          |
| 71        | I don't like the primary colors such as red or yellow.                                                      |                                                                                                          |
| Q4        | The diagrams agrees with my intuitive feeling more firmly as the granularity of the diagrams becomes finer. |                                                                                                          |
| Q2        | I like landscapes and the drawings which are not complicated.                                               |                                                                                                          |
| 72        | Q3                                                                                                          | I noticed that simplicity becomes the calmness which heals me.                                           |
| Q4        | The same as the Q3.                                                                                         |                                                                                                          |
| Q2        | I like the art works which assert themselves in drawing nature, or make myself feel at ease.                |                                                                                                          |
| 80        | Q3                                                                                                          | I began to feel that the simplicity in the abstract painting is one of the assertions which attracts me. |
| Q4        | I noticed that I got tired if the drawing includes only living things, or nature scenes.                    |                                                                                                          |
| Q2        | I like funny, understandable, impressive, or queer art works.                                               |                                                                                                          |
| Q3        | I am surprised at some of the art works which belong                                                        |                                                                                                          |
| 81        | to my cluster, but fond of the others.                                                                      |                                                                                                          |
| Q4        | The secondary cluster is related to my temporary feeling, or the influence from my friends.                 |                                                                                                          |

felt that the switch to the secondary clusters was not relevant. Subject nPID72 **discovered that the simplicity the**
subject prefers means the calmness that heals the subject rather than the technical conciseness of the drawings. According to the protocols, the subject talked about the primary **clusters in the finer granularity preference**
diagrams. Similarly to subject nPID59**, attention was paid to observing the detailed expression that the artworks**
in the primary cluster conveys. This seems to be the reason why the **switch is not relevant.**
The other subjects answered YES to question Q6 in Table 2. Subject nPID80 **talked about the secondary**
clusters in the more coarse granularity preference diagrams, and **became aware that the subject gets tired if the**
drawings include only living things or nature scenes. Subject nPID81 **talked about the secondary clusters in the**
finer granularity preference diagrams, and became aware that the temporary feeling, or the influence from friends, is included in the factors that determine the weak preference. Subject nPID66 **became aware that the flow of lines**
or brush strokes is relevant to the preference, rather than the **composition, which the subject expected before**
the group discussion. Subject nPID71 **talked about the artworks in the finer granularity preference diagrams**
and became aware that the subject has an intuitive sense of preference, which is contrary to the subject's prior understanding.

The content, which the subjects become aware of in the reflection **process, ranges widely. It is not limited**
to the unconscious preference. It may be a deeper analysis of the **expression in the artworks or the criteria to** select the artworks which the subjects prefer strongly. The degree of the prior understanding of the subjects also ranges widely. The granularity of the preference diagram with which **the individual subjects discover something** depends on the subject. It is important to introduce an adjustable parameter in visualization such as granularity to adapt to the differences in the subjects. These are the second **lessons learned in the experiments.**