Muhammad Khumaedi, FT P Teknik Mesin (2019) Validity and Reliability Content of Assessment Instrument of Writing on Descriptive Paragraph Material Based on Picture. Proceedings of the 5th International Conference on Science, Education and Technology, ISET 2019. pp. 1-6.

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Abstract

This study aims to analyze the results of content validity and reliability instrument of writing an assessment on descriptive paragraph material based on picture class VIII Semarang city. This analysis used the "Quantitative Descriptive" method. Data were analyzed through validation and reliability content. The content validity was analysed by using Aiken formula 'V and reliability was analysed by using Ebel’s formula assisted by the SPSS 16.0 program. The indicators of writing divide into five there are the namely main idea, organizations, vocabulary, grammar, and mechanics. The results of the Expert Judgment validity show are ≥ 0.3 it’s all of the items are valid, whole the result of reliability shows a result is 0.89. It means that an instrument of writing assessment instrument on descriptive paragraph material based on the picture was valid and reliable.

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