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Experimental Method, Otherwise Known As Quantitative Research Article Review

¶ … experimental method, otherwise known as quantitative research or laboratory study, is to formulate a hypotheses, to collect the data, and test this hypotheses according to scientific principles that obstruct, as carefully as possible, bias, and then to analyze this data using statistical measures. The experimental method uses random sampling as part of its discourse. Practical considerations usually limit the amount of control we have in structuring experiments, for instance we cannot always hope to randomize; we sometimes (more usually) often have to make do with the sample of participants given. This is when quasi-experimentation is employed.

This particular study is a quasi-experiment

Levels of measurement of the variables

There were two levels / conditions: (1) inquiry-based science curriculum and (ii) an inquiry-based science curriculum and reading strategy instruction

Types of statistics used to analyze the data and generate results

Three types of relevant psychological instruments were used to measure science literacy. An...

This is similar to generalization. Validity refers to the soundness of the study: whether or not the experiment explains what it claims to explain.
The generalizability and reliability is somewhat problematic her since although from 10 classes, they were form one school, therefore characteristics particular to that school, student body, geographical, location etc. may prevent results from being applied to another locality or school.

As regards validity, exhaustive methods were taken to prevent bias and to keep as close to objective as possible,…

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References

Fang, Y. & Wei, Z. (2010) Improving Middle School Students'Science Literacy Through Reading Infusion The Journal of Educational Research, 103:262 -- 273,

Hough David L. & Schmitt Vicki L. (2011) An ex post facto examination of relationships among the developmental designs professional development model

Middle Grades Research Journal, 6(3), 163 -- 175
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