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Validity and Reliability in Research

Validity is the most important idea to consider when preparing or selecting an instrument for use. More than anything else, researchers want the information they obtain through the use of an instrument to serve their purposes. Reliability refers to the consistency of the scores obtained—how consistent they are for each individual from one administration of an instrument to another and from one set of items to another.


Learning objectives

  • Explain what is meant by the term “validity” as it applies to the use of instruments in educational research.
  • Name three types of evidence of validity that can be obtained, and give an example of each type.
  • Explain what is meant by the term “correlation coefficient” and describe briefly the difference between positive and
  • negative correlation coefficients.
  • Explain what is meant by the terms “validity coefficient” and “reliability coefficient.”
  • Explain what is meant by the term “reliability” as it applies to the use of
  • instruments in educational research.
  • Explain what is meant by the term “errors of measurement.”
  • Explain briefly the meaning and use of the term “standard error of measurement.”
  • Describe briefly three ways to estimate the reliability of the scores obtained using a particular instrument.
  • Describe how to obtain and evaluate scoring agreement

Course Curriculum

Validity in research
What is validity in research? 00:00:00
The importance of validity 00:00:00
Types of validity 00:00:00
Factors influencing validity 00:00:00
Reliability in research
What is reliability in research? 00:00:00
The importance of reliability 00:00:00
Methods to ensure reliability 00:00:00
Factors influencing reliability 00:00:00

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នេះ​ជា​គេហទំព័រ​សម្រាប់​អ្នក​ដែល​ចង់​ស្វែងរក​វគ្គសិក្សា​នៅ​លើ​ប្រព័ន្ធ​អ៊ីនធឺណិត។ វគ្គសិក្សា​ទាំងអស់​ត្រូវ​បាន​យកចិត្តទុកដាក់ ទៅ​លើ​គុណភាព និង​តម្រូវការ​របស់​អ្នក​សិក្សា។ បន្ថែម​ពី​លើ​នេះ យើង​នឹង​ផ្ដល់​ជូន​ជា​ប្រចាំនូវ​ចំណេះដឹង​ថ្មីៗ ទាក់​ទៅ​នឹង​បច្ចេកវិទ្យា ការស្រាវជ្រាវ ក៏​ដូច​ជា​វិធីសាស្ត្រ​បង្រៀន។ ជាមួយ​នឹង​វគ្គសិក្សា និង​ចំណេះដឹង​ដែល​យើង​ផ្ដល់​ជូន យើង​សង្ឃឹម​ថា​អ្នក​នឹង​អភិវឌ្ឍ​ចំណេះ ជំនាញ​របស់​អ្នក​ឱ្យ​ស្រប​ទៅ​នឹង​យុគសម័យ​បច្ចេកវិទ្យា​នេះ។ ចាប់ផ្ដើម​ស្វែងរក​វគ្គ​ដែល​អ្នក​ចាប់​អារម្មណ៍ ចុះឈ្មោះ​ចូលរៀន និង​អាច​រៀន​បាន​គ្រប់​ពេលវេលា និង​គ្រប់​ទីកន្លែង។

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