Research Methods Class

Course Content
9. Proposal Writing
11. Structure of Chapter Five of Thesis or Dissertation
Research Methods Course
About Lesson

In lesson 24, we have discussed internal consistency methods of determining reliability. Internal consistency method of determining reliability indicates the degree of homogeneity among items in an instrument. It is estimated by determining the degree to which each item in a measure/instrument correlates with each other item in the same measure/instrument.

Internal consistency is based on a single administration of a measure. There are two types of Internal Consistency reliability:

  1. Split-Half
  2. Alpha Coefficient methods

Split-half method and how to determine split-half reliability tests has been discussed in details in lesson 24.

In this lesson, we are discussing the second method of determining internal reliability which is Alpha coefficient method. We have two types of Alpha coefficient: Cronbach Alpha and Kuder-Richardson. Cronbach Alpha is mainly used for Likert kind of scale questions while KR 20 is used for knowledge questions.

This lesson will also demonstrate how to determine Alpha reliability using SPSS. Make sure you watch the lessons on reliability for you to have flow of content. The links are shared below: Lesson 23: Repeated Measurement Methods of Determining Reliability (

Lesson 24: Split-half Reliability (

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