A recent study and review of the literature (Ford, 1960) provided no support for the view that the usual strains of genital pleuropneumonia-like organisms (PPLU) were a cause of non-gonococcal urethritis (NGU). It was noted, however, that Shepard (1956, 1957, 1960) had isolated morphologically distinct T-strain PPLO from the genital tract of patients with NGU, and that he believed these T-strai...

The authors tested 288 participants in the classic category-learning tasks introduced by Shepard, Hovland, and Jenkins (1961). However, separable-dimension stimuli were used in previous tests, whereas integral-dimension stimuli were used in the present study. In contrast to previous results, which showed a superiority for Problem Type II over Problem Types III, IV, and V, the reverse pattern wa...

in detail (e.g., one's own body; Parsons, 1987b), the rate of imagined reorientation for different planes or axes can vary by a factor of at least 3. In addition, the rate can vary by a factor of at least 2.5 for different directions within a plane of orientation difference (i.e., for clockwise and counterclockwise rotations about an axis; Parsons, 1987b). For other stimuli (e.g., those used by...

This paper describes and illustrates a way to construct multidimensional representations of reactive potential energy surfaces (PESs) by a multiconfiguration Shepard interpolation (MCSI) method based only on gradient information, that is, without using any Hessian information from electronic structure calculations. MCSI, which is called multiconfiguration molecular mechanics (MCMM) in previous ...

Mental rotation (MR) involves the ability to predict how an object will look once it has been rotated into a new orientation in space. To date, studies of MR in infants have tested this ability using abstract stimuli presented using a single display. Evidence from existing studies suggests that using multiple displays may affect an infant's performance in some kinds of MR tasks. This study used...