Chapter 21 - Multidimensional scaling and conjoint analysis. In this chapter, the following content will be discussed: Multidimensional scaling, approaches to creating perceptual maps, attribute based approaches, comparison of factor and discriminant analysis,...
Trang 4Attribute data Nonattribute data
Similarity Preference
Correspondence analysis Discriminant analysis MDS
Trang 5• Attribute based MDS MDS used on attribute data
• Assumption
▫ The attributes on which the individuals' perceptions of objects are based can be identified
• Methods used to reduce the attributes to a small number of dimensions
Trang 6• Based on both perceived differences between objects and differences between people's perceptions of objects
• Dimensions provide more interpretive value than discriminant analysis
Factor Analysis
Discriminant Analysis
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Trang 7Market
Trang 8• MDS uses proximities (value which denotes how similar or how different two objects are perceived to be) among different objects as input
Trang 9Due to large increase in the stress values from two dimensions to one, two dimensions are acceptable
Trang 10• Respondents may not perceive or evaluate objects in terms of underlying attributes
• May require more dimensions to represent them than the use of
flexible models
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Trang 12Marketing Research 12th Edition
Trang 13Perceptual Map Using Similarity Data
Trang 15• Perceptual mapping has not been shown to be reliable
across different methods
• The effect of market events on perceptual maps cannot be ascertained
• The interpretation of dimensions is difficult
• When more than two or three dimensions are needed,
usefulness is reduced
Trang 16• Technique that allows a subset of the possible combinations of product features to be used to determine the relative importance of each
Trang 17• The dependent variable is the preference judgment that a respondent makes about a new concept
• The independent variables are the attribute levels that need
to be specified
• Respondents make judgments about the concept either by considering
▫ Two attributes at a time Tradeoff approach
▫ Full profile of attributes Full profile approach
Trang 18• A value of relative utility is assigned to each level of an
attribute called partworth utilities
• The combination with the highest utilities should be the one that is most preferred
• The combination with the lowest total utility is the least preferred
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Trang 19• Where the general direction of attribute preference probably is known
Trang 20Marketing Research 12th Edition
Trang 21Utilities for Credit Card Attributes
Trang 22Marketing Research 12th Edition
Trang 23Approaches
Trang 24Marketing Research 12th Edition
Trang 25End of Chapter TwentyOne