Are there unconscious perceptual processes?

Blindsight and vision for action seem to be exemplars of unconscious visual processes. However, researchers have recently argued that blindsight is not really a kind of unconscious vision but is rather severely degraded conscious vision. Morten Overgaard and colleagues have recently developed new methods for measuring the visibility of visual stimuli. Studies using these methods show that reported clarity of visual stimuli correlates with accuracy in both normal individuals and blindsight patients. Vision for action has also come under scrutiny. Recent findings seem to show that information processed by the dorsal stream for online action contributes to visual awareness. Some interpret these results as showing that some dorsal stream processes are conscious visual processes (e.g., Gallese, 2007; Jacob & Jeannerod, 2003). The aim of this paper is to provide new support for the more traditional view that blindsight and vision for action are genuinely unconscious perceptual processes. I argue that individuals with blindsight do not have access to the kind of purely qualitative color and size information which normal individuals do. So, even though people with blindsight have a kind of cognitive consciousness, visual information processing in blindsight patients is not associated with a distinctly visual phenomenology. I argue further that while dorsal stream processing seems to contribute to visual awareness, only information processed by the early dorsal stream (V1, V2, and V3) is broadcast to working memory. Information processed by later parts of the dorsal stream (the parietal lobe) never reaches working memory and hence does not correlate with phenomenal awareness. I conclude that both blindsight and vision for action are genuinely unconscious visual processes.     

Some remarks about relativism and pseudo‐relativism in ethics

This article deals with socio‐cultural ethical relativism. An attempt is made to analyze an ethical relativistic statement, i.e. a statement which, prima facie, ascribes different value‐qualities to the same type of conduct, depending on the society in which it occurs. The conclusion arrived at is that, in the main, such statements do not express genuine relativism. On the other hand, views which can be regarded as genuinely relativistic, arc found to lack plausibility.     

Enactivism and the “problem” of perceptual presence

One of the classic debates in cognitive science is between nativism and empiricism about the development of psychological capacities. In principle, the debate is empirical. However, in practice nativist hypotheses have also been challenged for relying on an ill-defined, or even unscientific, notion of innateness as that which is “not learned”. Here this minimal conception of innateness is defended on four fronts. First, it is argued that the minimal conception is crucial to understanding the nativism-empiricism debate, when properly construed; Second, various objections to the minimal conception—that it risks overgeneralization, lacks an account of learning, frustrates genuine explanations of psychological development, and fails to unify different notions of innateness across the sciences—are rebutted. Third, it is argued that the minimal conception avoids the shortcomings of primitivism, the prominent view that innate capacities are those that are not acquired via a psychological process in development. And fourth, the minimal conception undermines some attempts to identify innateness with a natural kind. So in short, we have little reason to reject, and good reason to accept, the minimal conception of innateness in cognitive science.

     

Event-related brain potentials and cognitive processes related to perceptual—motor information transmission

In the present study, event-related potentials (ERPs) were recorded to investigate cognitive processes related to the partial transmission of information from stimulus recognition to response preparation. Participants classified two-dimensional visual stimuli with dimensions size and form. One feature combination was designated as the go-target, whereas the other three feature combinations served as no-go distractors. Size discriminability was manipulated across three experimental conditions. N2c and P3a amplitudes were enhanced in response to those distractors that shared the feature from the faster dimension with the target. Moreover, N2c and P3a amplitudes showed a crossover effect: Size distractors evoked more pronounced ERPs under high size discriminability, but form distractors elicited enhanced ERPs under low size discriminability. These results suggest that partial perceptual—motor transmission of information is accompanied by acts of cognitive control and by shifts of attention between the sources of conflicting information. Selection negativity findings imply adaptive allocation of visual feature-based attention across the two stimulus dimensions.     

Auditory processing and perceptual abilities of “organic” and “functional” stutterers

The present investigation was undertaken to determine whether significant differences in auditory processing and perceptual abilities exist between (1) stutterers as a supposedly homogeneous group when compared with controls, (2) two differentiated subgroups of stutterers, and (3) either of the stuttering subgroups when separately compared with controls. Dichotic listening and masking level difference (MLD) tasks were administered to the two groups of school-age stutterers and an age-matched nonstuttering control group. Stuttering subjects were differentiated into “organic” and “functional” subgroups on the basis of neuropsychological test performances. Organic stutterers performed significantly poorer than did controls on one MLD experimental condition. Functional stutterers performed more like control subjects than like organic stutterers.     

Politics on the Couch? Psychotherapy and Society—Some Possibilities and Some Limitations

The ideas and practices of psychotherapy, together with fresh thinking from many other sources, can help to revitalize Western politics which seem broken and moribund. The author describes various professional experiences of his own at the interface of politics and psychotherapy. These include consulting with mainstream and activist politicians and groupings. He discusses how politics in the West is changing in the general direction of what he calls “transformative politics.” He also asks if psychotherapists can make a difference in the political world today, explaining that, though enthusiastic about the prospect, he is also skeptical about it because the record of psychotherapists' involvement in politics is not very good. The paper includes an experiential and personally oriented section (“The Inner Politician”) that looks at how the political self is formed in culture, family, and the inner world. The notion of differing political styles as a source of conflict is explained and explored. The author concludes with some reflections on the relations between psychotherapy, politics, and spirituality.     

Utopia and history. Some remarks about Nikolai Berdjaev’s struggle with history

The article deals with the philosophy of Nikolai Berdjaev (1874–1948), which he formulated between The Philosophy of Inequality (written in 1918, but published in 1923) and The New Middle-Ages (1924). Berdjaev’s philosophy is analyzed in the context of the Russian Revolution of 1917 and its aftermath. The other point of reference is the crisis of culture and civilisation, which affected the West in the inter-war period. Berdjaev’s position has been interpreted in view of the archetypal myth of the struggle of the two principles, the principle of order (cosmos) and the forces of destruction (chaos). This myth is tied to the millenialist world view. Berdjaev took an anti-utopian stance. He juxtaposed the utopian-revolutionary principle with the hierarchical-creative one. From this position he criticized among others democracy, liberalism and socialism. In the midst of the crisis of the 1920s he remarked the possibility of spiritual rejuvenation putting forward the concept of the New Middle-Ages. One can say that at that time Berdjaev’s philosophy evolved within the conservative-creative framework, from the utopia of conservatism to the utopia of ‘free creativity’.     

Some Remarks on “Hearing-as” and its Role in the Aesthetics of Music

Starting from the context in which Wittgenstein thinks of the concepts of “seeing-as” and “hearing-as”, the basic relation is clarified between the question of representation, musical understanding, and the theory of musical expressiveness. The points of views of Wollheim, Scruton, Levinson, and Ridley are discussed, in a re-consideration of the notions of hearing and understanding within Wittgenstein’s “last philosophy”.     

Some observations on orthodoxy and Christian democracy∗

The Bloody Flag: Postcommunist Nationalism in Eastern Europe ‐— Spotlight on Romania by Juliana Geran Pilon. New Brunswick and London: Transaction Publishers, 1992, xi+89 pp. Paperback.     

Comment and Reply Why eye movements and perceptual factors have to be controlled in studies on “representational momentum”

In order to study memory of the final position of a smoothly moving target, Hubbard (e.g., Hubbard & Bharucha, 1988) presented smooth stimulus motion and used motor responses. In contrast, Freyd (e.g., Freyd & Finke, 1984) presented implied stimulus motion and used the method of constant stimuli. The same forward error was observed in both paradigms. However, the processes underlying the error may be very different. When smooth stimulus motion is followed by smooth pursuit eye movements, the forward error is associated with asynchronous processing of retinal and extraretinal information. In the absence of eye movements, no forward displacement is observed with smooth motion. In contrast, implied motion produces a forward error even without eye movements, suggesting that observers extrapolate the next target step when successive target presentations are far apart. Finally, motor responses produce errors that are not observed with perceptual judgments, indicating that the motor system may compensate for neuronal latencies.     

Iconic memory — an artifact of perceptual reconstruction processes?

Summary Two experiments, using a partial vs. whole report procedure to isolate iconic from short-term memory loss, are reported. In the first experiment 10 Ss had to judge the difference between two line lengths in a display of three pairs of lines (in rows). Results showed no significant variation in d' with cue delay in spite of a medium overall performance, and in contrast to preliminary partial/whole report experiments. To counter the possibility that the short-term memory load was too small in this experiment, a second experiment was performed with displays containing nine instead of three pairs, i.e., three pairs per row. Equivalence of performance for all conditions was about the same as before. This was true for both hit- and false-alarm rates. The results are interpreted as evidence against the view of iconic memory as a high capacity store containing a lot of information. An alternative reconstructive theory is put forward to explain both conventional iconic loss and our results. According to this account, partial report measures processed material rather than reflecting an iconic store of uninterpreted sensory events. Some consequences of this model are discussed in the context of some weak effects in our data; and suggestions are put forward for further investigation of visual processing.The experiments to be reported here were made possible by grant Schu 421/1–2 of the Deutsche Forschungsgemeinschaft. The main results of Experiment II have already been reported at the European Conference on Visual Perception at Nordwijkerhout, October 1979. I am indebted to Mrs. R. Ledebur, cand. phil, and Dipl.-Psych. G. Gros who collected the data. I also wish to thank Dr. A. Reeves (Dortmund) for helpful comments on an earlier version of this paper. Dr. P. Wolff (Osnabrück) and two anonymous reviewers contributed valuable suggestions concerning the final draft