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A total of 775 pure-strain and Fi mice were obtained from a 6 X 6 diallel mating plan. Each subject completed a battery of 12 tests of emotionality, requiring 1 mo. for completion. The subsequent 42 measures were factor analyzed by alpha factoring with varimax and promax (K = 2) rotations. Fifteen factors with eigenvalues equal to or greater than 1.0 were found. Ten of these factors were interpreted as different facets of emotionality. Another factor was identified as weight, and four were underdetermined. The 10 emotionality factors were interpreted as motor discharge, acrophobia, underwater swimming, Tunneling 1, audiogenic reactivity, food motivation, autonomic balance, territorial marking, activity level, and Tunneling 2. Similarities with other major factor-analytic studies of emotionality were discussed.

This report is concerned with identifying the first and second-order cognitive factors underlying a battery of 49 measures taken from 22 brain damage tests. The test scores from 176 brain damaged patients between 16 and 65 years of age were intercorrelated and subjected to first-order alpha factoring followed by promax rotation to oblique simple structure. Ten of the 13 first-order factors extracted were interpretable, six of them being perceptual in nature and four being of a more conceptual nature. The perceptual factors include: perceptual organization, perceptual-motor speed, pattern recognition, temporal resolution, spatial orientation, and figure-ground identification. The conceptual factors include verbal comprehension, memory, and two abstraction factors. A second-order alpha factoring was performed on the matrix of correlations among the 13 primaries. Three of the five second-order factors extracted were interpretable. They were identified as perceptual integration (subsuming the first-order factors of perceptual organization, perceptual-motor speed, and temporal resolution), verbal memory (subsuming verbal comprehension and memory), and visualization (subsuming spatial orientation and figure-ground identification). Although factor interpretations were based primarily on the patterns of high loading variables, they were also influenced by lesion effects observed in this and related studies. About half the interpretable factors are relatively localized (i.e., confined to one or two lobes of one hemisphere), with the other half more diffuse (i.e., multi-lobed, combined with laterality or bilaterality). The more localized factors include the right hemisphere factors of perceptual-motor speed, temporal resolution, and spatial orientation, and the left hemisphere factors of verbal comprehension, memory, and verbal memory. The more neurally diffuse factors include the second-order factors and such broad gauged first-order factors as abstraction I and II, and pattern recognition. Furthermore, same lobe, bilaterally hemispheric effects were rare, and only four factors (memory, verbal memory, visualization, and abstraction I) were correlated with sub-cortical lesions.

One hundred and nineteen mice of 10 inbred strains were run on 32 measures from 16 tests in order to obtain a large variance coverage of behavioral differences for the purpose of obtaining factors among emotionality measures and strain factor scores.