Introduction to sensory psychology, by C. Mueller.--Some reflections on brain and mind, by R. Brain.--In search of the engram, by K. Lashly.--Cerebral organization and behavior, by R. W. Sperry.--Relations between the central nervous system and the peripheral organs, by E. von Holst.--Effects of the Gestalt revolution, by J. E. Hochberg.--Seeing in depth, by R. L. Gregory.--The stimulus variables for visual depth perception, by J. J. Gibson.--The elaboration of the universe, by J. Piaget.--Visual perception approached by the method of stabilized images, (...) by R. M. Pritchard, W. Heron, and D. O. Hebb.--Philosophy as rigorous science, by E. Husserl.--The "sensation" as a unit of experience, by M. Merleau-Ponty.--The phenomenology of perception: perceptual implications, by A. Gurwitsch.--The expression of thinking, by E. W. Straus.--The concept of group and the theory of perception, by E. Cassirer.--Norm and pathology of I-world relations, by E. W. Straus.--The metaphysical in man, by M. Merleau-Ponty.--Cultural differences in the perception of geometric illusions, by M. H. Segall, D. T. Campbell, and M. J. Herskovits.--The interpretive cortex, by W. Penfield.--Recovery from early blindness: a case study, by R. L. Gregory and J. G. Wallace.--Visual disturbances after perceptual isolation, by W. Heron, B. K. Doane, and T. H. Scott. (shrink)

The anterior cingulate cortex (ACC)has been identified as part of a supervisoryattentional network for selecting alternativemotor programs in response to top-down corticalprocessing, particularly in situationsinvolving conflicting cognitive tasks.Bilateral lesions to the ACC may be causallyassociated with akinetic mutism, where patientsare unable to voluntarily initiate responses.The clinical and neuroanatomical evidence forthis presumed causal association is examined atlength. However, given the many reciprocalprojections between cerebral, motor, limbic andparalimbic structures within the executivesupervisory network, the association ofvoluntary behavior with a particular structure(the ACC) is (...) highly controversial and thereforepremature at this time. Also considered is theclaim that our subjective sense of voluntarycontrol and free will is simply due toour not having conscious access to theunderlying neural computations that precede our decisions and actions. On thecontrary, the distinction between voluntary and involuntary thoughts and actions mayrather be a matter of temporal and directionallag between parallel computations in differentneural areas. Finally, with reference toDennett, there is an extended discussion ofwhether patients with akinetic mutism are (i) conscious automata, (ii) non-intentional systems, and (iii) in azombie-like state. The relevance of (i)–(iii) for the cognitive neuroscientificliterature is then briefly addressed. (shrink)

The concept of voluntary motor control(VMC) frequently appears in the neuroscientific literature, specifically in the context of cortically-mediated, intentional motor actions. For cognitive scientists, this concept of VMC raises a number of interesting questions:(i) Are there dedicated, modular-like structures within the motor system associated with VMC? Or (ii) is it the case that VMC is distributed over multiple cortical as well as subcortical structures?(iii) Is there any one place within the so-calledhierarchy of motor control where voluntary movements could be said (...) to originate? And (iv) in the current neurological literature how is the adjective voluntary in VMC being used? These questions are here considered in the context of how higher- and lower-levels of motor control, plan, initiate, coordinate, sequence, and modulate goal-directed motor outputs in response to changing internal and external inputs. Particularly relevant are the conceptual implications of current neurological modeling of VMC concerning causal agency. (shrink)

The explanation [of scientific change and problem solving] must, in the final analysis, be psychological or sociological. It must, that is, be a description of a value system, an ideology, together with an analysis of the institutions through which that system is transmitted and enforced. Thomas Kuhn Traditional epistemology with its concentration… on knowledge in the subjective sense, is irrelevant to the study of scientific knowledge. Karl Popper.

ACCORDING to Bertrand Russell—and phenomenalism in general—all the complex constructs of non-scientific and scientific thought are logically derivable from what are termed ‘atomic facts’ or ‘atomic events’. These atomic facts totally constitute what is directly given in sensory experience, in contrast with those elements in knowledge which are logically constructed from these atomic facts. In line with this distinction between the sensory and the conceptual, Russell made a corresponding distinction between ‘knowledge by acquaintance’ and ‘knowledge by description’. Russell stated this (...) two-fold breakdown in the following way. (shrink)

summaryThis paper argues that an epistemological duality between mind/brain and an external world is an uncritically held working assumption in recent computational models of cognition. In fact, epistemological dualism largely drives computational models of mentality and representation: An assumption regarding an external world of perceptual objects and distal stimuli requires the sort of mind/brain capable of representing and inferring true accounts of such objects. Hence we have two distinct ontologies, one denoting external world objects, the other cognitive events and neural (...) transformations. A basic question is then raised and explored: If the elements of these two different ontologies are so radically different, how can the one access the other?The last part of the paper sketches an alternative to ED and the associated two ontologies account. Instead of external world objects being construed as independent givens, initiating perceptual processes, they are rather interpreted as ‘computational constructs’. It is argued at length that this account is far more consistent with recent computational models of mind/brain than the two ontologies model associated with ED. It is further claimed that an ontology of cognitive and neural states, as well as an external world ontology, have no other epistemic status that as contingent working hypotheses. As such, both ontologies are in principle amenable to revision as evidence, explanatory models, and scientific practices mutually readjust and redefine one another over time. (shrink)

summaryThis paper argues that an epistemological duality between mind/brain and an external world is an uncritically held working assumption in recent computational models of cognition. In fact, epistemological dualism largely drives computational models of mentality and representation: An assumption regarding an external world of perceptual objects and distal stimuli requires the sort of mind/brain capable of representing and inferring true accounts of such objects. Hence we have two distinct ontologies, one denoting external world objects, the other cognitive events and neural (...) transformations. A basic question is then raised and explored: If the elements of these two different ontologies are so radically different, how can the one access the other?The last part of the paper sketches an alternative to ED and the associated two ontologies account. Instead of external world objects being construed as independent givens, initiating perceptual processes, they are rather interpreted as ‘computational constructs’. It is argued at length that this account is far more consistent with recent computational models of mind/brain than the two ontologies model associated with ED. It is further claimed that an ontology of cognitive and neural states, as well as an external world ontology, have no other epistemic status that as contingent working hypotheses. As such, both ontologies are in principle amenable to revision as evidence, explanatory models, and scientific practices mutually readjust and redefine one another over time. (shrink)