![]() Through systematic random sampling, schools were assigned to intervention and control conditions. It will include 500 children aged between six and eight years old. ![]() SamplingĬluster sampling will be applied in this research to achieve the sample size needed. This paper will define the validity, reliability and sampling used in the research proposal. All these factors differ in every research and are defined by various instruments. Validity determines the extent to which the outcomes meet the test measures (Abutabenjeh & Jaradat, 2018). Reliability defines the consistency of research instruments and results. Sampling is the technique through which a size needed for an investigation is obtained. Sampling, validity and reliability are used by scientists to evaluate the quality of their studies.
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