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Volume Two - Academic Conferences

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Table: 8: Descriptive statistics<br />

Scores<br />

Type<br />

before Adaptive<br />

After Adaptive<br />

Table: 9: Independent samples test<br />

Scores<br />

Equal variances<br />

assumed<br />

Equal variances<br />

not assumed<br />

Levene's Test for<br />

Equality of Variances<br />

F Sig.<br />

4.2 Student’s evaluation questionnaire<br />

Nahla Aljojo et al.<br />

Group Statistics<br />

N Mean Std. Deviation<br />

Std. Error<br />

Mean<br />

28 11.7500 4.22405 .79827<br />

25 13.7600 1.56205 .31241<br />

Independent Samples Test<br />

t df Sig. (2-tailed)<br />

t-test for Equality of Means<br />

Mean<br />

Difference<br />

95% Confidence<br />

Interval of the<br />

Difference<br />

Std. Error<br />

Difference Lower Upper<br />

15.985 .000 -2.244 51 .029 -2.01000 .89562 -3.80804 -.21196<br />

-2.345 34.981 .025 -2.01000 .85723 -3.75029 -.26971<br />

Section 4.2 covers Test-Retest Reliability of student`s evaluation survey, Result of Student`s<br />

evaluation Survey and the final evaluation and assessment of the adaptive learning system by<br />

students.<br />

4.2.1 Test-retest reliability of student`s evaluation survey<br />

In estimating test-retest reliability, the same test is administered to the same or similar sample, on<br />

more than one occasion. Time elapsing between the measurements is critical. Typically the longer the<br />

time-gap is, the lower the correlation. In the study, the time lapse of one month was dictated by the<br />

classroom realities, as described above. Table 10 shows a moderate to strong correlation between<br />

the test and the retest questions of evaluation.<br />

Table: 10 Paired samples correlations<br />

N Correlation Sig.<br />

Pair 1 Q1_before & Q1_after 48 -.185 .209<br />

Pair 2 Q2_before & Q2_after 48 -.021 .888<br />

Pair 3 Q3_before & Q3_after 42 -.013 .934<br />

Pair 4 Q4_before & Q4_after 47 -.189 .204<br />

Pair 5 Q5_before & Q5_after 49 .082 .576<br />

Pair 6 Q6_before & Q6_after 48 .048 .745<br />

Pair 7 Q7_before & Q7_after 47 -.121 .416<br />

Pair 8 Q8_before & Q8_after 48 .011 .942<br />

Pair 9 Q9_before & Q9_after 49 -.010 .948<br />

Pair 10 Q10_before & Q10_after 49 .070 .633<br />

Pair 11 Q11_before & Q11_after 49 -.096 .511<br />

Pair 12 Q12_before & Q12_after 47 -.117 .435<br />

Pair 13 Q13_before & Q13_after 49 -.064 .662<br />

However, the difference between the means of answers fifth, ninth, tenth and thirteen questions were<br />

borderline significant (P = 0.002, P=.000, P=.017, P=.027 respectively ) and the correlation between<br />

the before and after of answers fifth, ninth, tenth and thirteen questions were the second lowest, at 0.<br />

.082,.010, .070 , 064 respectively (Table 11). Yet, the use of such standard statistical tools may be in<br />

905

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