Reliability and Validity Oral presentations

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Reliability and ValidityOral presentations

• Personality Lab
• December 1, 2009

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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.

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Reliability

• What is a reliable person?
• Reliability Bullseye Example

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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.

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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?

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Types of Reliability, cont.

• Internal Consistency
• Average item-total correlations

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Types of Reliability, cont.

• Internal Consistency
• Average item-total correlations

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Types of Reliability, cont.

• Internal Consistency
• Average item-total correlations

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Types of Reliability, cont.

• Internal Consistency
• Split-Half Reliability
• Spearman-Brown Formula
• R2r/1 r

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Types of Reliability, cont.

• Internal Consistency
• Split-Half Reliability
• Spearman-Brown Formula
• R2r/1 r

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Types of Reliability, cont.

• Internal Consistency
• Split-Half Reliability
• Spearman-Brown Formula
• R2r/1 r

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Types of Reliability, cont.

• Internal Consistency
• Cronbachs Alpha
• Average of All Split-Half Reliabilities

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Validity

• Face
• Concurrent
• Minnesota Multi Phasic Personality Inventory

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Validity, cont.

• Predictive
• Construct

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Oral Presentations

• KISS principle
• Introduce
• Results
• Conclusion

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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.

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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