• Publications
  • Influence
Conscious, preconscious, and subliminal processing: a testable taxonomy
A taxonomy is proposed that distinguishes between vigilance and access to conscious report, as well as between subliminal, preconscious and conscious processing, and that conscious perception is systematically associated with surges of parieto-frontal activity causing top-down amplification.
How rich is consciousness? The partial awareness hypothesis
It is argued that the empirical evidence for phenomenal consciousness without access is equivocal, resulting either from a confusion between phenomenal and unconscious contents, or from an impression of phenomenally rich experiences arising from illusory contents.
Mind wandering at the fingertips: automatic parsing of subjective states based on response time variability
A step by step elaboration and testing of a continuous index, based on response time variability within Sustained Attention to Response Tasks, suggests that the index carries information about the subjective state of the subject even when he or she is not probed, and opens the way for on-line tracking of mind wandering.
Mapping introspection’s blind spot: Reconstruction of dual-task phenomenology using quantified introspection
Insight into conscious perception is systematically delayed and distorted while central processing resources are monopolized by another task, the psychological refractory period effect.
Limits on Introspection
It is demonstrated that introspective response time can be a sensitive measure, tightly correlated with objective response time in a single-task context, but in a psychological-refractory-period task, the objective processing delay resulting from interference by a second concurrent task is totally absent from introspective estimates.
The cognitive architecture for chaining of two mental operations
Overall, the results suggest that chaining is slow, effortful, imperfect (resulting partly in parallel rather than serial execution) and dependent on conscious control.
Is self-generated thought a means of social problem solving?
Novel evidence is provided that the capacity for SGT is implicated in the process by which solutions to social problems are generated, although optimal problem solving may be achieved by individuals who display a suitable balance between SGT and cognition derived from perceptual input.
Perceptual illusions in brief visual presentations
This work presents a classical partial-report paradigm now modified to include unexpected items in the unreported parts of the stimuli, and proposes that the feeling of seeing emerges from the interplay between partially accessible information and expectations.
Two dimensions of visibility revealed by multidimensional scaling of metacontrast
  • J. Sackur
  • Psychology, Medicine
  • 1 February 2013
It is argued that metacontrast creates multidimensional complex percepts, a property that may run counter to its use as a simple modulator of visibility, and cast doubt on the use of visibility scales that ignore the qualities of the percepts.
An oblique illusion modulated by visibility: non-monotonic sensory integration in orientation processing.
It is found that participants could reproduce quite accurately the orientation of very brief stimuli presented at lowest visibility levels, and the magnitude of the deviation followed a non-monotonic pattern, which suggests that categorical processing of sensory information depends on perceptual awareness.