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Reliability

THREATS TO RELIABILITY . 1. The participantSubject fatigue

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Reliability

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    1. Reliability

    2. THREATS TO RELIABILITY 1. The participant Subject fatigue – multiple tasks may result in fatigue and unreliable results Subject motivation – interest and moods with respect to the study or test may vary

    3. The testing lack of clarity or completeness of directions How rigid the instructions are followed

    4. The scoring Competence of scorer

    5. 4. The instrumentation Lack of calibration Electronic problems

    6. Which do these affect? multiple tests intelligence levels ego biased Surveys Males vs. females

    7. Inter-rater reliability/objectivity – the degree that different testers can receive the same answers Intra-rater reliability-

    8. Halo Effect Commonly observed tendency The rater allows previous impressions to affect their observations

    9. Can it be reliable but not valid? Can it be valid but not reliable?

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