Evaluation - Advances in Personalized Web-Based Education - page 108

Table 4.10 Tests of between-subjects effects
Source Dependent

variable

Sig. Partial eta

squared

Noncent.
parameter

Observed
power *

Group Grade_on_lesson1 0.000 0.182 22.621 0.991

0.000 0.177 21.923 0.990

Grade_on_lesson2

* Computed using alpha = .05

Table 4.11 Multiple comparisons
Dependent
variable

(I)
group

(J) group Mean dif-

ference
(I-J)

Std.
error

Sig. 95 % confidence interval

Lower
bound

Upper
bound

1.0571 * Group A Group B 0.26767 0.000 0.4205 1.6938

Grade_on_
lesson1

10.1429 *

0.26767 0.000 0.5062 1.7795

Group C

− 1.0571 *

− 1.6938 − 0.4205

Group B Group A 0.26767 0.000

0.0857 0.26767 0.945 − 0.5509 0.7223

Group C

− 1.1429 *

Group C Group A 0.26767 0.000 − 1.7795 − 0.5062

− 0.0857 0.26767 0.945 − 0.7223 0.5509

Group B

0.9143 * Grade_on_

lesson2

Group A Group B 0.22204 0.000 0.3862 1.4424

0.8857 * Group C 0.22204 0.000 0.3576 10.4138

− 0.9143 *

Group B Group A 0.22204 0.000 − 1.4424 − 0.3862

Group C − 0.0286 0.22204 0.991 − 0.5567 0.4995

− 0.8857 * Group A 0.22204 0.000 − 1.4138 − 0.3576

Group C

Group B 0.0286 0.22204 0.991 − 0.4995 0.5567

* The mean difference is significant at the .05 level

The results of Table 4.11 show that both 'grade_on_lesson1' and 'grade_on_les-
son2' are statistical significantly different between either group A and group B
(Sig. < 0.0005) or group A and group C (Sig. < 0.0005). However, the dependent
variables are not statistical significantly different between group B and group C.
Therefore, the use of the presented web-based programming tutoring system has a
positive effect on the results of the further studies of the learners.

4.3.6 Learners' Satisfaction About the System's Adaptive
Responses to Their Needs

The learners' satisfaction about the system's adaptive responses to their need is
very satisfactory. The results of the questionnaire reveal that the programming
tutoring system considers the learners needs and reacts dynamically each time to
meet them. The results of the learners' answers to the Questionnaire E (Appendix
B) are depicted in Fig. 4.11 .