A Q-theoretic approach to distinctive subsegmental timing

This paper presents two case studies of segment-internal timing distinctions which motivate Q Theory, in which each segment (Q) is represented as a string of featurally uniform subsegments (q), e.g. (q1 q2 q3), corresponding to the informal concepts of onset, target, and offset (Inkelas & Shih 2013, 2016, 2017, Shih & Inkelas 2014). We argue, based on Panará and Hungarian, that this representational richness is motivated by the need to represent phonologically tripartite segments, as well as segment-internal timing distinctions that are phonologically contrastive. In addition to supporting existing Q theory architecture, we also argue for expanding the repertoire of Q Theory further to include phonologically long segments, such as geminates.

Looking into Segments

This paper outlines Q theory, in which the traditional segment (consonant, vowel) is decomposed into a string of three ordered subsegments, or q, representing the onset, target, and offset of the segment. The postulation of subsegmental structure permits the representation of complex (contour) segments as well as subtle contrasts in segment-internal changes of state. Q Theory synthesizes insights from Autosegmental Phonology, Aperture Theory, and Articulatory Phonology in a representation that standard phonological constraints can refer to. Q theory is supported by arguments that subsegments act independently and need to be independently referenced by the phonological grammar. Embedded into Agreement by Correspondence Theory, Q theory permits the analysis of contour assimilation as well as contour formation, both in the tonal and segmental domains.

Adaptation-induced blindness is orientation-tuned and monocular

We examined the recently discovered phenomenon of Adaptation-Induced Blindness (AIB), in which highly visible gratings with gradual onset profiles become invisible after exposure to a rapidly flickering grating, even at very high contrasts. Using very similar stimuli to those in the original AIB experiment, we replicated the original effect across multiple contrast levels, with observers at chance in detecting the gradual onset stimuli at all contrasts. Then, using full-contrast target stimuli with either abrupt or gradual onsets, we tested both the orientation tuning and interocular transfer of AIB. If, as the original authors suggested, AIB were a high-level (perhaps parietally mediated) effect resulting from the ‘gating’ of awareness, we would not expect the effects of AIB to be tuned to the adapting orientation, and the effect should transfer interocularly. Instead, we find that AIB (which was present only for the gradual onset target stimuli) is both tightly orientation-tuned and shows absolutely no interocular transfer, suggesting a very early cortical locus.