Table 1. Knowledge of the participants on the concept of lichens
Item Theme Percentage of number of
participants who answered
each question correctly (%)
Percentage
Difference for
correct answer
(%) Pre test Post test
Alga characteristics 39.1 48.4 9.3
Concept on Lichen 98.4 98.4 0.0
Source of air quality 79.7 84.4 4.7
Quadrant concept 34.4 42.2 7.8
Function of lichen as a biological
indicator.
53.1 89.1 36.0
Types of lichen 46.9 96.9 50.0
Lichen frequency calculations 26.6 15.6 -11.0
Determination of air quality index value 28.1 51.6 23.5
Air quality determining factors 23.4 43.8 20.4
Role of Lichen 14.1 - -
Determination of the level of air pollution - 10.9 -