MLIM 6025 Task 6 – Experimental Research Produced by: Eliza Yu Clara Kwan Lucile Lee Phoebe Leung July 2007
Proposed Study 1
Research Question : to study the effectiveness of parents’ guidance on healthy diet by comparing the BMI improvement of students who receive parents’ education on the healthy diet vs the existing students who receive normal education on the healthy diet.
H 0 : (Null Hypothesis) Mean of BMI of the students under parent’s guidance on healthy diet is the same as the mean of BMI of the students under normal education on healthy diet.
H a : (Alternate Hypothesis) Mean of BMI of the students under parent’s guidance on healthy diet will be different from the mean of BMI of the students under normal education on healthy diet.
Form 2 students, boys and girls, from three local secondary schools, who fit the following criteria
1. Parents are willing to join the research
2. willing to let the teachers take their BMI in P.E. lessons.
Sampling method :
Equal number of boys and girls
Sample size :
a total of 90 students from three schools
How could data for the variables be collected?
The Experimental Process
Randomly select 30 students
Random assignment ( R ) of students to experimental group and control group
Use of a pre-test ( O ) - BMI* of all F.2 students from the three schools is to be collected.
Independent variable : Parental Guidance
Dependent variable : Health diet concept
Measured by : BMI
* Body Mass Index : which is the measurement of health in a formula: Body weight (Kg) / Height 2 (cm 2 )
The Experimental Process
Parents of the experimental group receive a DVD on how to provide guidance of healthy diet to teenage children.
Parents show the DVD clippings to their children everyday for 15 minutes before dinner for two months. There should be 60 clippings of videos in total (Treatment X 1 ).
For the second (control) group, the students will just receive the normal education on healthy diet at school (Treatment X 2 ).
After two months, perform a post-test ( O ), and compare the measurement of BMI of the two group of students.
The pretest-posttest control group design
R O X 1 O
R O X 2 O
T test : the mean score of BMI of both groups will be measured.
H 0 (null hypothesis) will be rejected if the p < 0.05 in level of significance .
How to contribute to improvements on the education/learning & teaching?
helps to identify if parents’ involvement will help teenagers to focus on the importance of a healthy diet.
Health Department or the school can design effective ways to promote healthy diet to teenagers.
Proposed Study 2
Is there any relationship between the use of discussion forum and students’ learning?
H 0 : (Null hypothesis) there is no relationship between the use of discussion forum and student learning
H a : (Alternate hypothesis) there is relationship between the use of discussion forum and student learning