Profiles of intelligence

Johnson, W. & Bouchard, Jr., T. J. Sex Differences in Mental Abilities: g Masks the Dimensions on Which They Lie. Intelligence, 2007, 35, 23-39:

“… we have presented evidence supporting the idealized notion of general intelligence as a general-purpose mechanism that accesses a toolbox made up of components that vary from individual to individual. Though everyone clearly has most if not all of the same tools, individuals appear to differ not only in the skill with which they use their tools, but also in the specific tools they habitually use. For some of the more specific tools, it would appear that using one tool means failing to use another. […] Performance on image rotation tasks is known to predict success in fields such as airplane piloting, engineering, physical sciences, and fine arts better than does general intelligence, and especially verbal ability. What has perhaps not been recognized is that inclusion of verbal ability in assessments used to recruit individuals to those fields may actually act to impair efforts to select those with the talents most relevant to the jobs in question.”

John Raven often quotes Spearman:

“Every normal man, woman and child is a genius at something … the problem is to identify at what … this must be a most difficult task because it occurs in only a minute proportion of circumstances … this cannot be done with any of the procedures in current use …”

(And Raven would still quite like to know how to fix psychometrics.)

"... we have presented evidence supporting the idealized notion of
general intelligence as a general-purpose mechanism that accesses a
toolbox made up of components that vary from individual to individual.
Though everyone clearly has most if not all of the same tools,
individuals appear to differ not only in the skill with which they use
their tools, but also in the specific tools they habitually use. For
some of the more specific tools, it would appear that using one tool
means failing to use another. [...] Performance on image rotation tasks
is known to predict success in fields such as airplane piloting,
engineering, physical sciences, and fine arts better than does general
intelligence, and especially verbal ability. What has perhaps not been
recognized is that inclusion of verbal ability in assessments used to
recruit individuals to those fields may actually act to impair efforts
to select those with the talents most relevant to the jobs in question."
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