Reliability - characteristics of research tools, Other Management

Reliability:

Refers  to  the accuracy  and consistency  of a measuring tool. A measure is reliable when  an  individual remains nearly  the  same  in repeated measurements. Reliability  is measured by reliability coefficient  and  the estimation  of rkliability  can be  done statistically. How to estimate  the  degree  of reliability?

a)  Coefficient of  Stability  shows consistency of performance  on  a test  over  a period  of  time. It is based  on  the correlation between performances on initial test and retest after  a distinct interval. That  is,  it  involves repetition of  the same test. A  test may  be  reliable even though  it may  not be valid. A  valid  test  is usually reliable. 

b)  Coefficient of Equivalence  shows consistency of performance on different forms  of a  test. It  is based  on the correlation between performances on the different .forms administered at nearly the  same time. That &,  a second equivalent  form of  the test is  administered. 

c)  Coeflcient of Internal Consistency  shows consistency  of performance  on different  parts or items  of  the test taken at  a  single  sitting. This  coefficient is usually computed  by  "split-half'  correlation (e.g. Sperman-Brown formula), or by  using Kuder-Richardson formula. That  is,  the analysis involves subdivision of the  test  into  two  or more  equivalent fractions.  

Posted Date: 11/3/2012 8:29:01 AM | Location : United States







Related Discussions:- Reliability - characteristics of research tools, Assignment Help, Ask Question on Reliability - characteristics of research tools, Get Answer, Expert's Help, Reliability - characteristics of research tools Discussions

Write discussion on Reliability - characteristics of research tools
Your posts are moderated
Related Questions
Full leather binding:  Full leather binding means that whole of the card board is covered by leather. Books which are very expensive and are rare may need this kind of binding.

GENERAL OBSERVATIONS: Large scale use of information in all countries by a wide cross section of people has resulted in the coming of terms like 'information age and informati

Organisation: In an open access library which allows users to browse, choose and select books of their interest, shelf organisation and arrangement of books are of primary imp

Newspapers: Newspapers Of all the library materials, the newspaper is probably the most comprehensive, the easiest, to collect and the most vanishing type of a source. The new


Question 1: "One of the main challenges of hotel management today is the rapid changes in customer requirements, trends and tastes, resulting in the necessity for frequent exte

Arrays and Chains: Isolates are arranged in what are called arrays and chains. ,An array is a sequence of coordinate (equally ranked) classes arranged in some definite order.

Question 1: a. What are the traditional measures of development? b. What are the basic characteristics of the least developing nations? c. According to Denis Goulet, what

Question: In recent decades, tourism has emerged as one of a small group of service industries that increasingly dominate the global economy. However, the structure and sig

Requirements for direct contracting  Let us now look at the requirements for direct contracting:    The requirement of direct contracting should be such that it can be ju