Narratives of illness in a Chinese virtual hospital

This study explores 60 individual narratives of illness presented in the initiating messages of threads that are posted in a well-known virtual space, ‘Tianya Hospital’ (????), in China. ‘Tianya Hospital’ is a discussion board where website users discuss their own or their loved ones’ health problems with other participants, who may be either health experts or patients with similar illnesses. Adopting the approach of mediated discourse analysis, the study aims to find out what is narrated (i.e., narrative presentation categories), what stance is taken and what the patterns and functions of the narrative presentation and the stance taking are. Some narrative presentation categories identified in this study are to some degree associated with existing face-to-face medical consultation phases, while others are related to a ‘timescale’ frame and the ‘sick role’ concept. The findings also show that the online narratives present not only the description of health problems, but also epistemic and affective stances. Some features of the narrative presentation organization and the stance taking in narratives can perform particular functions, such as serving to legitimize patients’ or patients’ caregivers’ complaints about healthcare services

The initial phase of auditory and visual scene analysis

Auditory streaming and visual plaids have been used extensively to study perceptual organization in each modality. Both stimuli can produce bistable alternations between grouped (one object) and split (two objects) interpretations. They also share two peculiar features: (i) at the onset of stimulus presentation, organization starts with a systematic bias towards the grouped interpretation; (ii) this first percept has ‘inertia’; it lasts longer than the subsequent ones. As a result, the probability of forming different objects builds up over time, a landmark of both behavioural and neurophysiological data on auditory streaming. Here we show that first percept bias and inertia are independent. In plaid perception, inertia is due to a depth ordering ambiguity in the transparent (split) interpretation that makes plaid perception tristable rather than bistable: experimental manipulations removing the depth ambiguity suppressed inertia. However, the first percept bias persisted. We attempted a similar manipulation for auditory streaming by introducing level differences between streams, to bias which stream would appear in the perceptual foreground. Here both inertia and first percept bias persisted. We thus argue that the critical common feature of the onset of perceptual organization is the grouping bias, which may be related to the transition from temporally/spatially local to temporally/spatially global computation.

The Effects of Intensity and Interval Rhythms on the Perception of Auditory and Visual Temporal Patterns

Repeating temporal patterns were presented in the auditory and visual modalities so that: (a) all elements were of equal intensity and were equally spaced in time (uniform presentation); (b) the intensity of one element was increased (accent presentation); or (c) the interval between two elements was increased (pause presentation). Intensity and interval patterning serve to segment the element sequence into repeating patterns. For uniform presentation, pattern organization was by pattern structure, with auditory identification being faster. For pause presentation, organization was by the pauses; both auditory and visual identification were twice as fast as for uniform presentation. For auditory accent presentation, organization was by pattern structure and identification was slower than for uniform presentation. In contrast, the organization of visual accent presentation was by accents and identification was faster than for uniform presentation. These results suggest that complex stimuli, in which elements are patterned along more than one sensory dimension, are perceptually unique and therefore their identification rests on the nature of each modality.