In statistics, scale analysis is a set of methods to analyze survey data, in which responses to questions are combined to measure a latent variable. These items can be dichotomous (e.g. yes/no, agree/disagree, correct/incorrect) or polytomous (e.g. disagree strongly/disagree/neutral/agree/agree strongly). Any measurement for such data is required to be reliable, valid, and homogeneous with comparable results over different studies.
Contents
1Constructing scales
2Measurement models
2.1Traditional models
2.2Modern models based on Item response theory
2.3Other models
3References
Constructing scales
The item-total correlation approach is a way of identifying a group of questions whose responses can be combined together into a single measure or scale. This is a simple approach that works by ensuring that, when considered across a whole population, responses to the questions in the group tend to vary together and, in particular, that responses to no individual question are poorly related to an average calculated from the others.
Measurement models
Measurement is the assignment of numbers to subjects in such a way that the relations between the objects are represented by the relations between the numbers (Michell, 1990).
Traditional models
Likert scale
Semantic differential (Osgood) scale
Reliability analysis, see also Classical test theory and Cronbach's alpha
Factor analysis
Modern models based on Item response theory
Guttman scale
Mokken scale
Rasch model
(Circular) Unfolding analysis
Circumplex model
Other models
Latent class analysis
Multidimensional scaling
NOMINATE (scaling method)
References
Michell, J (1990). An Introduction to the logic of Psychological Measurement. Hillsdales, NJ: Lawrences Erlbaum Associates Publ.
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For other people named Steve Gadd, see Steve Gadd (disambiguation). Steve Gadd Gadd at Bodø Jazz Open, 2014 Background information Birth name Stephen Kendall Gadd Born ( 1945-04-09 ) April 9, 1945 (age 73) Irondequoit, New York, U.S. Genres Jazz post-bop jazz fusion rock blues R&B Occupation(s) Musician, drummer, percussionist and session musician Instruments Drums, percussion Years active 1968–present Website www.drstevegadd.com Stephen Kendall Gadd (born April 9, 1945 [1] ) is an American drummer, percussionist, and session musician. Gadd is one of the most well-known and highly regarded session and studio drummers in the industry, recognized by his induction into the Modern Drummer Hall of Fame in 1984. [2] Gadd's performance on Paul Simon's "50 Ways to Leave Your Lover" and Steely Dan's "Aja" are examples of his style. He has worked with popular musicians from many genres including Simon ...
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