# measurement 5

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1. Variable
a characteristic that can vary or take on different values

• ex) height is a variable
• ** independent and dependent variable
2. Value
a number representing one of many possible states of the variable

ex) some possible values are 6 ft or 4 feet 2 inches
3. Score
a specific value for a given person

ex) my score on the variable of height is 5 feet 11 inches
4. How to systematically observe something?
it is critical to have a well defined or quantative system of measurement.

• ex) how far are you sititng from screen?
• ***use ruler or tape meausre to measure it
5. Can Psychological properties be measured?
Yes!
6. What kind of statement is this? "some people are more shy than others
• quantitative
• ** subject to numeric qualification
7. Quantitative
subject to numeric qualification
8. 2 types of important variables
categorical or continuous
9. Categorical, taxonic, qualitative or nominal variables...
people either belong to a group or they do not.

ex) country of origin, biological sex, animal or non animal, married vs single

*how many people belong to each category?
10. Continuous variables
-people vary in a graded way with respect to the property of interest

ex) age, working memory capacity, and marital discord

quantitative q: how much? or to what extent or degree?
11. (scales of measurement) Ordinal
-designates an ordering; quasi-ranking

-does not assume that the intervals between numbers are equal

ex) finishing place in a race (first place, second place)
12. (scales of measurement) interval
-designates an equal-interval ordering

distance between a 1 and 2 is same distance as 4 and 5

ex) common IQ tests
13. (scales of measurement) Ratio
• -designates an equal-interval ordering with a true zero
• * zero implies an absence of the thing being measured

• ex) number of intimate relationships a peron has had.
• *zero means none
• * a person with 4 has had twice as many as 2
14. MOst observable behaviors can be measured by...
ratio-scale
15. many unobservable psychological qualities are measured on...
on general by interval scales
16. chart order
• variables: categorical
•                 COntinuous: ordinal, interval, ratio
 Author: efrain12 ID: 173682 Card Set: measurement 5 Updated: 2012-10-01 00:55:18 Tags: research psych Folders: Description: day 6 Show Answers: