# collier test 5

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The flashcards below were created by user brittanyball42 on FreezingBlue Flashcards.

1. Ratio
• Real measurements
• ex. height, weight, speed, velocity, mass, area, volume
• there is a true 0 point
• this means that division and multiplication are meaningful
• experimental psychology tends to use ratio measurements
2. Experimental psychology ratios
• accuracy
• reaction time
• heartrate
• brain waves
• response rates of pigeon or rate in a Skinner box
3. Interval
• quantitative variable
• like ratio measurement
• There is NO true 0 point
• Sums and differences are meaningful, but not multiplication and division (ratios)
4. Interval examples
• temperature scales, including Celsius and FAhrenheit
• clock or calender time, because we dont know when time started
5. Interval level measurements
• In testing, personality and social psychology we frequently use questionnaire and test responses such as Liket (agree-disagree) scales
• usually convert these to numbers and use math on them, so we are treating them as interval scales.
• may be considered ordinal scales
6. Nominal
• categories without order
• there are no numbers
• sometimes we use numbers as categories
• ex. social security numbers
• numbers on football jersies
• telephone numbers
7. how do you do statistics with nominal variables
it requires a trick, count the number of items in each category
8. Ordinal
• Ordered categories
• freshman, sophomore, junior, senior
• Nominal and ordinal are similar
• the distances between each point are not neccessarily equal
9. Levels of measurement have a natural order, from strong to weak
• Strong: Ratio; Interval (quantitative)
• Weak: Ordinal;Nominal (qualitative/catergorical)
10. Permissible operations
all levels of measurement have certain mathematical operations that are allowed, and others that are not allowed
11. Permissible operations: Ratio variables
Multiplication and division (ratio) operations ar permitted because there is a true 0 point
12. Permissble operations: Interval variables
addition and subtraction ar allowed, but not division and multiplication
13. Permissible operations: ordinal variables
comparison of less and more are allowed, but not the other mathematical operations
14. Permissible operations: nominal variables
comparison of same or different are allowed, but not less or more, or any other mathematical operations
15. Demotion
• Involves throwing away information
• ex Rank height
16. Promotion
• Involves adding information that you dont have
• ex. GPA calculator
17. Norm Referencing
• each score is compared to the average of a reference group
• grading on a curve is an application
• ex IQ testsĀ
• SAT, GRE
• Personality inventories
18. Criterion referencing
• each score is compared to an absolute standard
• these are generally used when absolute performance levels are set
• Ex. DMV written exams
• State K-12 testing (No Child Left Behind)
• PACT
19. Percentile
it depends on how many ppl took the test to determine how good the rank is
20. Standard scores
• obtained from raw scores by converting the distribution to one with a new mean and standard deviation
• Z scores are the most common
21. Z scores
once z score is obtained we can convert this to a percentile by looking up the z scored on a table of the normal distibution
• publishers cheat
• based on z scores for the same school grade, not different school grades
23. SEM
• standard error of measurement
• test scores vary randomly
• ppl test scores may vary from their true scores
• measures how far a test score is likely to be from the true score (it is a kind of standard deviation of measurment)
24. True score
a real score that would be obtained by giving the test over and over again and averaging the results

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 Author: brittanyball42 ID: 180759 Filename: collier test 5 Updated: 2012-11-05 15:15:41 Tags: collier test Folders: Description: collier test 5 Show Answers:

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