Biomedical subjects

T Regier

Publications and source records attributed to T Regier.

4 recordsLinked to original sources

PubMed2007

Further evidence that Whorfian effects are stronger in the right visual field than the left.

The Whorf hypothesis holds that differences between languages induce differences in perception and/or cognition in their speakers. Much of the experimental work pursuing this idea has focused on the domain of color and has centered on the issue of whether linguistically coded color categories influence color discrimination. A new perspective has been cast on the debate by recent results that suggest that language influences color discrimination strongly in the right visual field but not in the left visual field (LVF). This asymmetry is likely related to the contralateral projection of visual fields to cerebral hemispheres and the specialization of the left hemisphere for language. The current study presents three independent experiments that replicate and extend these earlier results by using different tasks and testing across different color category boundaries. Our results differ in one respect: although we find that Whorfian effects on color are stronger for stimuli in the right visual field than in the LVF, we find that there are significant category effects in the LVF as well. The origin of the significant category effect in the LVF is considered, and two factors that might account for the pattern of results are proposed.

Adult↗

PubMed2006

Combined X-ray absorption spectroscopy and density functional theory examination of ferrocene-labeled peptides.

A combination of soft X-ray absorption spectroscopy (XAS) measurements and StoBe density functional theory (DFT) calculations has been used to study the electronic structures of the ferrocene-labeled peptides Fc-Pro(n)-OBz (n = 1-4). Excellent agreement between the measured and the simulated data is observed in all cases, and the origin of all major spectral features was assigned. The breaking of the degeneracy of the ferrocene 3e(2u)-like unoccupied molecular orbital under the influence of a substituent attached to a Cp ring was observed experimentally. The influence of the bonding environment on the O 1s and N 1s XAS spectra was examined. A corrected assignment of one of the major features in the Fe 2p XAS spectra of ferrocene is proposed and supported by the DFT simulations, as well as the measured spectra.

Ferrous Compounds↗

PubMed2001

Grounding spatial language in perception: an empirical and computational investigation.

The present paper grounds the linguistic cdategorization of space in aspects of visual perception; specifically, the structure of projective spatial terms such as above are grounded in the process of attention and in vector-sum coding of overall direction. This is formalized in the attentional vector-sum (AVS) model. This computational model accurately predicts linguistic acceptability judgments for spatial terms, under a variety of spatial configurations. In 7 experiments, the predictions of the AVS model are tested against those of 3 competing models. The results support the AVS model and disconfirm its competitors. The authors conclude that the structure of linguistic spatial categories can be partially explained in terms of independently motivated perceptual processes.

Adult↗

PubMed2000

Linguistic and non-linguistic spatial categorization.

Three experiments examine the relation between linguistic and non-linguistic categorization of spatial relations. We compare linguistic and non-linguistic responses to the same spatial stimuli. Contrary to earlier claims in the literature (Hayward, W. G. & Tarr, M. J. (1995). Spatial language and spatial representation. Cognition, 55, 39-84), we find that linguistic and non-linguistic spatial categories do not correspond. Rather, they appear to have an inverse relation such that the prototypes of linguistic categories, such as 'above', are boundaries in non-linguistic spatial categorization. Evidence for this inverse relation comes from linguistic acceptability judgments and the pattern of bias in participants' reproductions of location. Our findings suggest that while linguistic and non-linguistic spatial organization rely on a common underlying structure, that structure may play different roles in the two organizational systems.

Cognition↗