Table 2: Negative common (NC) elements.

Negative common (PC)

Av score (Av)

Mention index (MI)

1NC

Little time for learning 3D

5

90

2NC

Use of schoology points LMS

4

30

3NC

Lose track of contents

2

60

4NC

Group grades versus individual

5

40

5NC

Gamification: points & badges

6

30

6NC

Many retouching image tools

5

50

7NC

Use of vectorial software

5

10