Conceptually, it would seem likely that neural mechanisms required for such a task involve segregation of the motion of the target from the motion of the background.
The second experiment carried out on British dyslexic young adults with a phonological disorder using the same auditory segregation task but a different visual paradigm revealed an SAS in both the visual and the auditory modalities.
Using a method of constant stimuli, we varied the number of "background" patches that were vertical and measured the probability of correct discrimination of the global orientation of the E (up/down/left/right). Surprisingly, amblyopes who showed strong crowding and deficits in symmetry detection and counting, perform normally or very nearly so in this segregation task.
We recently compared MUA with single-unit data in a curve-tracing and a figure-ground segregation task and found that MUA, indeed, provides a reliable estimate of the average single-unit response (Supèr and Roelfsema 2005).
However, from a clinical perspective, the segregation task indexes a process involved in recognizing a salient sound (e.g. one's own name) within the auditory environment, while the grouping task indexes a process involved in tracking a conversation (a particular speaker) in the presence of background noise.
We will discuss tasks that probe binding and object perception, but we will initially stay away from visual search and texture segregation, tasks that have been used to measure the efficiency of feature binding in previous work (e.g., Treisman & Gelade, 1980; Wolfe, 1994).
We evaluated the separation performance of the proposed system and compared it with the Hu Wang tandem system for the speech segregation tasks with artificially mixed speech data.
In a stream-segregation task, two stimulus streams, one of high-frequency tones and one of low-frequency tones, were interleaved.
Massed training tests for learning mediated by short-term task retention plus perceptual segregation; spaced active avoidance also tests for 24-hour retention [11], [12].
The most common categories associated with segregation include job types, tasks, occupational nomenclatures, firms with different technologies or capital endowments and sectors of activity.
