Direct and Indirect Discrimination Prevention Methods - Discrimination and Privacy in the Information Society - page 236

13.3 Taxonomy of Discrimination Prevention Methods
Beyond discrimination discovery, preventing knowledge-based decision support
systems from making discriminatory decisions (discrimination prevention) is a
more challenging issue. The challenge increases if we want to prevent not only di-
rect discrimination but also indirect discrimination or both at the same time. In this
section, we present a taxonomy of discrimination prevention methods after having
reviewed a collection of independent works in the area. Figure 13.2 shows this
taxonomy. In order to be able to classify the various approaches, we consider two
orthogonal dimensions based on which we present the existing approaches. As a
first dimension, we consider whether the approach deals with direct discrimina-
tion, indirect discrimination, or both at the same time. In this way, we separate the
discrimination prevention approaches into three groups: direct discrimination
prevention methods , indirect discrimination prevention methods , and direct and
indirect discrimination prevention methods . The second dimension in the classifi-
cation relates to the phase of the data mining process in which discrimination pre-
vention is done.
Fig. 13.2 The taxonomy of discrimination prevention methods