RELIABILITY‚ VALIDITY AND REPRESENTATIVE SAMPLE IN RESEARCH John and Webb (2002‚ p.148) distinguishes between validity and reliability‚ arguing that the first one is the extent to which a research is capable of measuring what it is supposed to be measuring and the second one is the extent to which a research delivers consistent results. Validity and reliability measurement instruments are free of bias and random error. Haynes and Heiby (2004‚ p.47) propose some questions addressing sampling adequacy
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-------------------------------------------------------------------------------- 6 BASIC STATISTICAL TOOLS There are lies‚ damn lies‚ and statistics...... (Anon.) -------------------------------------------------------------------------------- 6.1 Introduction 6.2 Definitions 6.3 Basic Statistics 6.4 Statistical tests -------------------------------------------------------------------------------- 6.1 Introduction In the preceding chapters basic elements for the proper
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contention. For example‚ application forms‚ tests and interviews can evaluate the applicants’ skills‚ abilities‚ relative to the job and so on. To judge the effectiveness of any stage of selection process‚ two statistical concepts have been of particular importance‚ Reliability and Validity. An organisation has two key resources‚ people and money.. Recruitment and Selection comprise the important HR functions of the organization and should be thought of as a matching process. Selection commences
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initial tool construction and validation using subject panel expert and item analysis method. Process of tool development A content specialist panel (CSP) strategy was utilized to produce the items and item wording‚ and to build up content validity. Utilization of content specialist panel to create items and build up content validity for scale improvement has been well recorded in the literature (Hinkin‚ 2005; McLean et al.‚ 2005; Yang‚ 2005). Review of literature built up the five measurements of the
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Reliability and Objectivity of Accounting Measurement‚ Author: Y.Ijiri and R.K.Jaedicke‚ The Accounting Review‚ Vol.41. No.3‚ 1966‚ 474-483 Summary: Accounting is a measurement system in which number of alternative measurement methods are available. Criteria for choosing best measurement alternative is an issue over the life of accounting. The user groups and the purpose for which data will be used are important‚ however‚ the use or purpose of the data is simply too broad and general a criterion
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Focus group research- reliability‚ validity‚ replicability‚ generalisability A focus group can be defined as a group interview- centered on a specific topic and facilitated and co-ordinated by a moderator or facilitator- which seeks to generate primarily qualitative data‚ by capitalizing on the interaction that occurs within the group setting. The idea behind the focus group method is that group processes can help people to explore and clarify their views in ways that be less easily accessible
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Reliability is general rather than specific But validity is not general but specific. Reliability is necessary for validity because a test with score which fluctuates very much does not test anything. For example if a test of pronunciation measures pronunciation it is a valid test‚ instead of measures grammar and vocabulary. The test yields dependable scores that is if the scores do not fluctuate very much the test is reliable. means the scores obtained by a student will be close to the score she
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Reliability and Validity Paper Samantha Smith BSHS/382- Research and Statistics April 22‚ 2013 ANGELA COLISTRA Introduction Reliability and Validity are two important aspects of research in the human services field and without these tools researchers results would be incomplete. This paper will give examples of the different types of reliability and validity and examples on how they apply to human services research. Also this paper will provide examples of data collection
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Validity is about the extent to which a piece of research in finding out what the research is finding out what the researcher intents to find out. The idea of validity means that something is true and can be believed. When people say ‘that’s a valid point”‚ they mean that the point is relevant‚ meaningful and believable. It is concerned with truth and value‚ that is whether conclusions are correct or not. It also considers whether the method‚ approaches and techniques actually relate to what is being
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Lab Report Using Gravitational Force as a Measurement Tool Answer the following questions about the results of this activity. Record your answers in the boxes. Send your completed lab report to your instructor. Don’t forget to save your lab report to your computer! Activity 1 Record your data from Activity 1 in the boxes below. Enter the data for the sample you used in each trial (5000 rpm‚ 10000 rpm‚ etc…) in the appropriate columns and the corresponding g-force‚ number of layers
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