Experimental group: This group used AVT (Auditory-Visual Technology) 3 times a week for a total of 6 weeks. Program 11 and Program 12 alternating two days apart. The students are in a reclining position while undergoing AVT.

Control group: No AVT will be used.

Experimental purpose: The purpose of this experiment was to see if the Audio Visual Entrainment Technology is helpful to develop Chinese youth's intelligence.

1.2 Experimental methods:

The experimental group students will use AVT for six weeks, three times a week, each session will last 35 minutes. The two programs used will be alternated. Each student will use Program # 11 and Program # 12 each week for 6 weeks. Total of 18 AVT sessions. 9 sessions of Program #11, and 9 sessions of Program #12.

The control group will use no AVT.

Evaluation methods:

Experimental Report of AVT

( AVT : Audio Visual Entrainment Technology )

Experimental school: Zheng Yu Tong middle school, Shunde district

Experimental group: Class 5 of Junior Three, 50 students

Control group: Class 1 of Junior Three, 50 students

Experimental purpose:

The purpose of this experiment is to see if the Audio Visual Entrainment Technology is helpful to develop Chinese youth's intelligence.

1.    Experimental material and methods

1.1 General material:

Experimental group, Class 5, is a class in the lower level of study in Junior Three, including 14 male students and 36 female students, its average age is 15.

Control group, Class 1, is a class in the common level of study in Junior Three, including 21 male students and 29 female students, its average age is 15.

1.2 Experimental methods:

The experimental group students used AVT for three month, sixth times a week, each time last 20 minutes (6：50 am~7：10 am).

The control group didn’t use AVT.

Evaluation methods:

l        IQ test:

Utilized Raven's Progressive Matrices to test the experimental group students’ IQ before and after using AVT, so did the control group at the same time, comparing the difference between the former and latter IQ score for two groups.

l        Major courses scores comparisons:

Using the SPSS statistical analysis software, chose t-test to compare the difference between the former score and the latter score of each course for two groups.

l        Self-evaluation:

Self-evaluation is mainly according to the experimental group students’ experience of using AVT

2.    Experimental result

2.1 IQ score comparison

IQ score comparison of experimental group:

26 students’ IQ scores were improved, 14 students’ IQ scores were descended, 10 students’ IQ scores had no change

IQ score comparison of control group:

15 students’ IQ scores were improved, 30 students’ IQ scores were descended, 5 students’ IQ scores had no change

2.2 Major courses scores comparison

Experimental group students got much higher mean of score in all major courses after using AVT. The increased range was respectively Math: 22 points, Chinese: 30.48 points and English: 19 points.

As to the control group, the latter means of Math and English scores were better than their former ones. The increased range was respectively Math: 8.42 points and English: 2.6 points, however, Chinese score is contrary, the latter means of Chinese score was 4.64 points poorer than the former one.

3.    Discussion (analysis)

3.1: Statistical analysis:

Statistical analysis of IQ（Z - test）

Since there are two means of IQ scores from two groups, and we want to see if their representative collectivities are significant different, so we select Z –test method.

Relation between P and |Z|

Former Z value:

|Z|=1.397<1.96

The former IQ difference of the two groups is non-significant.

Latter Z value:

|Z|=0.925<1.96

The latter IQ difference of the two groups is also non-significant.

The results indicated that at the 0.05 level of significance, AVT has not significant effect upon student’s IQ.

Statistical analysis of major Course scores（t - test）

t-test was used to perform the statistical analysis on the scores of major courses from two groups, via the SPSS statistical analysis software.

Relation between P and t

A.      Results analysis of comparing the former and latter scores of major courses (Paired samples t-test )

First, do a t-test for the former and latter major courses scores of each group, respectively. Judge the effectiveness of this experiment by the significance of the difference between the means of the former score and the latter score of each course.

a) t-test results of experimental group

Table 1: Paired samples t-test results of experimental group（e2:e1）

Table 1 illustrates that all the latter means of each major course score are higher than their former ones. The increased range was respectively Math: 22 points, Chinese: 30.48 points and English: 19 points.

On the other hand, in table 1, all Significance Probability, P <0.01, that is to say, there is a extraordinary significant difference between the former and latter major courses scores, moreover, as mention above, all the latter means of major courses scores are better than the former ones, so we can make a conclusion that the experimental group gain obvious improvement in all major courses after using AVT.

b) t-test results of control group:

Table 2: Paired samples t-test results of control group（c2:c1）

Analysis of Statistical Results:

According to table 2, we can see that the control group students also got better means of scores in Math and English than their former ones. The increased range was respectively Math: 8.42 points and English: 2.6 points. However, Chinese score is contrary, the latter mean of Chinese score was 4.64 points poorer than the former one.

we can also see that all Significance Probability, P <0.05, that means there is significant difference between the means of the former scores and the latter scores for all major courses, combined with mention above, we can conclude that the control group students got some progress in Math and English study.

B.        Results analysis of comparing the mean of the difference between the former and latter scores of two groups ( independent samples t-test )

As the results mentioned above, both experimental group and control group students performed better in Math and English study in this experiment, especial the experimental group. In terms of Chinese, the experimental group had a raise, while the control group descends a little.

In order to confirm the effectiveness of AVT for students’ study, we use independent samples t-test to compare the mean of the difference between the former and latter score of each course for two groups

Table 3: Independent samples statistics of two groups

Table 4: Independent samples t-test results of two groups (e2-e1) : (c2-c1)

The results are summarized below:

From Table 3 and Table 4, we can see that all the means of the difference between the former and latter scores of the experimental group are better than those of the control group. The difference range is respectively Math: 13.58 points, Chinese:35.12 points and Engish:16.40 points.

We can also see from table 4:

About Math, the Sig. value of “Levene's Test for Equality of Variances” is 0<0.05, that means “Equal variances not assumed”, so we should adopt the sig. value in the row of “Equal variances not assumed”, that is 0<0.05, in conjunction with analysis above (Math: 13.58 points), we can concluded that that the experimental group gain greater improvement in Math than the control group after they used AVT.

In terms of Chinese, the Sig. value of “Levene's Test for Equality of Variances” is 0.002<0.05, so we should also adopt the sig. value in the row of “Equal variances not assumed”, that is 0<0.05, combined with analysis above (Chinese: 35.12), we can make a conclusion that the experimental group made more significant progress in Chinese than the control group after they used AVT.

As to English, the Sig. value of “Levene's Test for Equality of Variances” is 0.530>0.05, therefore, we should adopt the sig. value in the row of “Equal variances assumed”, that is 0<0.05, combined with analysis above (English: 16.40 points), we can deduce that the experimental group had a better improvement in English than the control group after they used AVT.

To sum up the analysis above, we draw a conclusion that the experimental group had great progress in all major course study after they used AVT, that is to say, AVT can significantly promote the students’ study.

Statistical analysis of Questionnaire（Percentage test）

We adopted percentage test to do the statistical analysis of the student’s self-evaluation questionnaire.

Table Q1

Table Q1 indicated that all students using AVT think it’s effective to their study, and half of students have a good evaluation on AVT.

Table Q2

We can see from Table Q2, AVT has various effects upon student’s study. Particularly, “Attention concentration” and “Emotion stabilization”, both of them were chosen by over 1/3 students.

Table Q3

Table Q3 illustrates most of the experimental group students will continue to use AVT, 75% students will keep on use it.

Table Q 4

Table 4 indicated that more than 60% students believe that morning is the best time to use AVT. The following better time is evening, 23% students choose it.

Table Q 5

It’s obvious in the results of Table Q5 that all experimental group students are satisfied with our work in this experiment.

GuangDong Social Medical Seminar

Dr. Koo Psychological Consultancy & Training Institute