Raters are really bad at rating employees This can do away with some biases in

# Raters are really bad at rating employees this can do

• 6

This preview shows page 2 - 4 out of 6 pages.

Raters are really bad at rating employees. This can do away with some biases in self report but still has problems Halo effect - tendency of ratings of one positive characteristics to spill over to influence to rating of other characteristics. Reverse halo - negative ratings spill over Ex: one time she took my parking spot, so she sucks and she's a bad employee Random Selection The key to finding generalizability(external validity) in surveys and questionnaire studies Ensures every person in a population has an equal chance of being chosen to participate. Evaluating measures Note: the word “test” is referring to any measurement operation Good Measurements need to have 3 things: Reliability There's only one kind of reliability, but several ways to measure it. Does your measurement measures things consistently? Will it measure the same way a day from now? A few days from now? A week from now? You can not have a valid test without reliability 3 major domains: Time People (graders, raters, judges, etc.) Items The most common domain we’re interested in is Time . Ways of measuring: Test-retest reliability Item reliability Parallel-forms of reliability Alternate-forms reliability Validity Does the test measure things accurately? Is it measuring your construct? Validity is basically the accuracy of the test. Specifically: validity = how accurate is the test for what it was designed to measure?
Utility Does the test measure things economically? It is useful? Does it take 17 hours per person? Does it cost a lot? 2/6 Correlational designs Explain how variables are related Can range from -1 to +1 Positive - as one increase so does the other Negative - as one decreases the other decreases Zero - no relationship between variables Scatterplots are a way correlation between variables.

#### You've reached the end of your free preview.

Want to read all 6 pages?

• Fall '17
• CindyPury
• Causality, Correlational

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern