Reliability It means the extent to which a test is consistent and dependable. It is concerned with the consistency of responses from moment to moment. However‚ it may not always be valid. Techniques in Testing the Reliability of Assessment Methods or RAM I. Test-retest Method The same test is administered twice to the same group of student and the correlation coefficient is determined. Disadvantages: 1. When the time interval is short‚ the respondents may recall their previous responses resulting
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Reliability in the design context Weibull Analysis • • • • Practical testing Trends Beta trends Real data for numerical work • Weibull examples Failure rate Early-life failure Wear out Mid-life failure Time in service Failure rate Falling values suggesting initial defects x Rising values suggesting wearing out o x o x x Time in service o o o Failure rate β>1 Β<1 β=1 Time in service Failure modes and effects analysis System/equipment: Analyst: Dwg no‚: Date:
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Exam-type questions on Thrust Bearing design 1. You have been asked to design a minimum power-loss‚ uni-directional‚ thrust bearing for an horizontally-mounted‚ axial‚ ammonia compressor in a nitric acid plant. The compressor has a shaft diameter of 100 mm and generates a thrust of 15kN when operating at 6‚000 rpm. The thrust is negligible at zero speed. a. What type of thrust bearing would you recommend and why? b. What are the physical reasons why a dry‚ PTFE bearing would
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Reliability and validity are essential in terms of observation and measurement as it relates to human services research. In order to ensure this particular research has legitimacy it is vital that testing and research is consistent and specific. This paper will define and describe the types of reliability and validity and provide examples of each as it relates to human services research. It will also provide examples of how data collection methods and instruments are used in relation to human services
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determine the characteristics of the total test. This article‚ therefore‚ focuses on total test characteristics that include reliability‚ validity‚ and practicality. Reliability Reliability is one of the most important characteristics of all tests in general‚ and language tests in particular. In fact‚ an unreliable test is worth nothing. In order to understand the concept of reliability‚ an example may prove helpful. Suppose a student took a test of grammar comprising one hundred items and received a
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for validity and reliability throughout the selection process. Explain how this can be achieved and critically examine the practical case for and against such rigour in selection‚ in practice‚ in an English context. In your essay‚ examine other perspectives dictating features of the selection process and if and how these can be reconciled with the need for validity and reliability” Word Count: 2‚637 words INTRODUCTION: The essay explains about Validity and Reliability and the other aspects
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The Depression Anxiety and Stress Scale (DASS): The study of Validity and Reliability Ahmet AKIN* Bayram ÇET‹N** Abstract This study investigated the validity and reliability of the Turkish version of the Depression Anxiety Stress Scale (DASS). The sample of the study consisted of 590 university students‚ 121 English teachers and 136 emotionally disturbed individuals who sought treatment in various clinics and counseling centers. Factor loadings of the scale ranged from .39 to .88. Findings
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Key Concepts MHR 3200—Exam 1 Note: This is not necessarily an all-inclusive list‚ but rather is intended merely to be a list of the major concepts of which you should have a good level of knowledge and understanding. I reserve the right to ask questions on Exam 1 that do not tie directly to material on this list but do fall into the required reading and/or other presentation materials for this section of the course. Introduction/Course Overview/Introductory Lecture - Disciplines contributing
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Thematic Apperception Test Olive Jane M. De Leon BS Psychology 3-5 The Thematic Apperception Test (TAT)‚ is a projective psychological test. Proponents of this technique assert that a person’s responses reveal underlying motives‚ concerns‚ and the way they see the social world through the stories they make up about ambiguous pictures of people.[1] Historically‚ it has been among the most widely researched‚ taught‚ and used of such tests.[2] History The TAT was developed during the 1930s
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DISCUSS ISSUES RELATED TO THE RELIABILITY OF A PSYCHOLOGICAL MEASURE Part of long question: The activities dealing with the basic principles of psychometric theory. 6. Stage 6: Evaluating psychometric properties and establishing norms 6.1 Establishing Reliability Scheme: 1. What is meant by a person’s observed score? True score and error variance in a test score? 2. The typical sources of true variance and error variance in a test score. 3. The interpretation of a reliability coefficient and how large
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