Editing Holland Codes (section)

=== Tracey and Rounds's spherical model ===
Tracey & Rounds criticizes that the conventional models of occupational interest structure do not correctly depict the positional relationship of occupations because they neglect occupational prestige, i.e., "social prestige" or "high socioeconomic status" and proposes a spherical model that assigns occupations to a 3-dimensional space incorporating occupational prestige.<ref>{{Cite journal|last1=Tracey|first1=Terence J.G.|last2=Rounds|first2=James|date=February 1996|title=The Spherical Representation of Vocational Interests|journal=Journal of Vocational Behavior|volume=48|issue=1|pages=3–41|doi=10.1006/jvbe.1996.0002}}</ref> In this model, 18 regions of interest are displayed on a spherical space. The left hemisphere has a high status area, with Health Sciences at the top. The right hemisphere has a low status area, with Service Provision as the lowest ground.

Though this model is excellent in the point of more accurately describing the relation between various occupations, it makes the occupation interest structure more complicated, and there is a weak point that it is difficult to be adapted to the data except for the U.S.<ref name=":0" />