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Reliability and Validity Oral presentations

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Reliability and Validity Oral presentations – PowerPoint PPT presentation

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Title: Reliability and Validity Oral presentations


1
Reliability and ValidityOral presentations
  • Personality Lab
  • December 1, 2009

2
Satisfaction with Life
  • 1 - Strongly disagree 4 Neutral 7-Strongly
    Agree
  •  
  • _____1. In most ways my life is close to my
    ideal.
  • _____2. The conditions of my life are excellent.
  • _____3. I am satisfied with my life.
  • _____4. So far I have gotten the important
    things I want in
  • life.
  • _____5. If I could live my life over, I would
    change almost
  • nothing.
  • _____6. I love SPAM.

3
Reliability
  • What is a reliable person?
  • Reliability Bullseye Example

4
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5
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6
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7
Satisfaction with Life
  • 1 - Strongly disagree 4 Neutral 7-Strongly
    Agree
  •  
  • _____1. In most ways my life is close to my
    ideal.
  • _____2. The conditions of my life are excellent.
  • _____3. I am satisfied with my life.
  • _____4. So far I have gotten the important
    things I want in
  • life.
  • _____5. If I could live my life over, I would
    change almost
  • nothing.
  • _____6. I love SPAM.

8
Types of Reliability
  • Test Retest
  • How did your scores compare across two occasions?
  • Why does test-retest tell us?
  • Any time when test-retest is not desired?

9
Types of Reliability, cont.
  • Internal Consistency
  • Average item-total correlations

10
Types of Reliability, cont.
  • Internal Consistency
  • Average item-total correlations

11
Types of Reliability, cont.
  • Internal Consistency
  • Average item-total correlations

12
Types of Reliability, cont.
  • Internal Consistency
  • Split-Half Reliability
  • Spearman-Brown Formula
  • R2r/1 r

13
Types of Reliability, cont.
  • Internal Consistency
  • Split-Half Reliability
  • Spearman-Brown Formula
  • R2r/1 r

14
Types of Reliability, cont.
  • Internal Consistency
  • Split-Half Reliability
  • Spearman-Brown Formula
  • R2r/1 r

15
Types of Reliability, cont.
  • Internal Consistency
  • Cronbachs Alpha
  • Average of All Split-Half Reliabilities

16
Validity
  • Face
  • Concurrent
  • Minnesota Multi Phasic Personality Inventory

17
Validity, cont.
  • Predictive
  • Construct

18
Oral Presentations
  • KISS principle
  • Introduce
  • Results
  • Conclusion

19
Oral Presentations
  • KISS Principle The KISS principle stands for
    Keep it simple stupid. You should always be
    aware of your audience and tailor your talk so
    that everyone can understand it.
  • Introduce You should begin by indicating how
    the topic you have chosen is an important one.
    You might want to give some real life examples.
    Then, just like in your papers, you will want to
    briefly set the stage for your own research by
    discussing previous relevant research.

20
Oral Presentations, cont.
  • Results When you present results to an audience
    you want to carefully select a subset of results
    that best represents the main point(s) that you
    want to get across. Do not present every finding
    you have and risk the possibility of overwhelming
    and boring your audience
  • Conclusion Tell your audience what you found,
    why it is important and interesting, what you
    think should be done in the future to bolster
    confidence in your results and other research
    that might serve as a natural extension of your
    current research. Take home message that
    summarizes your entire research
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