Research Method in Education
A researcher conducted a study to determine the effectiveness of the Computer-Assisted Method, Inquiry Method and the Lecture Method in teaching mathematics to 12 year old learners.
She used a quasi-experimental design for her study and selected the sample from three intact classrooms as shown in the table below.
Computer Assisted Method 30
Inquiry Method 30
Lecture Method 30
At the end of the experiment which lasted for 10 weeks, all subjects were tested on their reading skills and their scores were compared.
a) Why do you think the researcher selected a quasi-experimental design and not a true design?
b) State TWO (2) null hypotheses for the study.
c) Discuss FOUR (4) threats to the internal validity of the experiment.
d) Explain any TWO (2) techniques that the researcher could use to ensure the three groups are equivalent in ability. e) In order to reject the null hypothesis, it is necessary to analyse the data statistically. Explain.
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