Thermal Imaging for Enhancing Inspection Reliability: Detection
Enhancing reliability and error in evaluation
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Transcript of Enhancing reliability and error in evaluation
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Reliability
Enhancing Reliability
Common errors in performance appraisals/evaluation
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ENHANCING RELIABILITYSeveral test characteristics affect reliability
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Enhancing reliability
Construct items and task clearly
Sufficient number of items or task in a test
Appropriate test difficulty
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Enhancing reliability
Sufficient time limits in test
Less influence of extraneous events or factors
Continue assessment until result are consistent
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Enhancing reliability
Use independent raters or observers who provide similar score to the same performance (NO BIAS).
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COMMON ERRORS IN PERFORMANCE APPRAISALS/EVALUATION
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Leniency/generosity error
• The tendency to evaluate all people as outstanding rather than true assessments of performance.
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Severity error
• Tendency to evaluate all people as poor in the assessment performance. Usually has a high standard than the others.
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Central-tendency error
• The reluctance to give extreme ratings, either positive or negative.
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Halo effect error
• The tendency to make inappropriate generalizations from one aspect of a person’s job performance.
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Contamination effect
• Happens when Raters include nonperformance factors like race, gender, hair color, etc. into an appraisal
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Reference:
• http://www.regent.edu/acad/global/publications/rgbr/vol1iss1/performance_appraisals.shtml
• http://www.referenceforbusiness.com/management/Em-Exp/Employee-Evaluation-and-Performance-Appraisals.html
• http://smartchurchmanagement.com/performance-appraisal-rater-errors/#sthash.ol8V2pQh.dpuf
• Mc millian, J.H. 1997 classroom assesment