Distractor effect on the latent inhibition of conditioned flavor aversion in rats

Using a conditioned flavor aversion procedure with rats as subjects, the effect of the addition of a distractor stimulus on the magnitude of the latent inhibition effect was examined. Experiment 1 showed that latent inhibition to vinegar was attenuated by the addition of sucrose during preexposure. On the other hand, sucrose added during conditioning to vinegar did not attenuate latent inhibition. It was also found that the degree of latent inhibition to the vinegar-sucrose compound solution was less when vinegar alone was preexposed (i.e., when sucrose was added only during conditioning) than when the compound solution was preexposed (i.e., when sucrose was added both during preexposure and during conditioning). Experiment 2 gave similar results but with sucrose assigned as the target flavor and vinegar as the distractor. These findings are in full agreement with the generalization decrement account of latent inhibition.     

The effects of preexposure-test and conditioning-test intervals on the magnitude of latent inhibition

Using the conditioned taste aversion paradigm, two experiments were conducted to examine the effects of the interval between preexposure and test and that between conditioning and test on the magnitude of latent inhibition. Experiment 1 revealed that the degree of latent inhibition was attenuated when rats were given a 21‐day interval between preexposure and test. It was also found that this attenuation was more marked in subjects which were given conditioning immediately after preexposure than those which were conditioned shortly before the test. Retention interval between preexposure and test was reduced to 12 days in Experiment 2, and exactly the same pattern of results as those found in Experiment 1 was obtained. These findings suggest that the memory of conditioning as well as that of preexposure decreases its retrievability after a long retention interval, although the former is more retainable than the latter.     

Secondary self‐deception

According to doxastic accounts of self‐deception, self‐deception that P yields belief that P. For doxastic accounts, the self‐deceiver really believes what he, in self‐deception, professes to believe. I argue that doxastic accounts are contradicted by a phenomenon that often accompanies self‐deception. This phenomenon – which I term ‘secondary deception’ – consists in the self‐deceiver's defending his professed (deceit‐induced) belief to an audience by lying to that audience. I proceed to sketch an alternative, non‐doxastic account of how we should understand self‐deception in terms of the self‐deceiver's misrepresentation of himself as believing that P.     

Representation and Regress

I defend a Husserlian account of self-consciousness against representationalist accounts: higher-order representationalism and self-representationalism. Of these, self-representationalism is the harder to refute since, unlike higher-order representationalism, it does not incur a regress of self-conscious acts. However, it incurs a regress of intentional contents. I consider, and reject, five strategies for avoiding this regress of contents. I conclude that the regress is inherent to self-representationalism. I close by showing how this incoherence obtrudes in what must be the self-representationalist’s account of the phenomenology of experience.     

Flow Experience and Autotelic Personality in Japanese College Students: How do they Experience Challenges in Daily Life?

Using the experience sampling method (ESM) and a sample of Japanese college students, the present study conducted two major examinations. First, the present study examined whether flow theory's most basic and general hypothesis, that quality of experience is a function of perceived challenges and skills, was applicable to the Japanese sample. Second, the present study identified autotelic and non-autotelic groups of Japanese college students and explored the nature of autotelic personality, focusing on how perceptions of challenges and skills affected the quality of these two groups' experiences, and how these two groups balanced their perceived challenges and skills when engaged in daily activities. The results showed that high challenge/high skill situations created an optimal state of mind for the Japanese college students, as flow theory postulates. Moreover, a Japanese index of psychological well-being referred to as Jujitsu-kan was reported as being high during periods of flow. The exploratory examination of the autotelic personality showed that the autotelic students' levels of perceived challenges and skills were more balanced than those of their non-autotelic counterparts. Moreover, the autotelic students showed a tendency to position themselves in situations where their perceived challenges were higher than their perceived skills, whereas the reverse was true for the non-autotelic students. Implications of these findings were discussed in terms of the universality of flow experience and autotelic personality, and their potentials to increase psychological well-being for the Japanese, as well as people across cultures.     

Context dependency of conditioned aversions to familiar and novel fluids

Using a context discrimination procedure and rats as the subjects, the formation of context-dependent aversions to novel and familiar fluids was investigated. Experiment 1 revealed that context dependency could be established to a novel fluid (saccharin) after three cycles of context discrimination training and that the acquired context dependency was revealed also to a second familiar fluid (water) presented in the following test. Experiment 2 showed that the formation of the context-dependent aversion and its transfer to a second fluid was not affected by whether fluid presented during discrimination was novel (saccharin) or familiar (water). Experiment 3 demonstrated that when the same water was given both in the two training contexts and in the home cages of the subjects during discrimination, the context-dependent aversion formed was specific to it. These findings can be explained in terms of a simple summation effect of fluid-nausea and context-nausea associations.     

Exploring the neural basis of cognition: multi-modal links between human fMRI and macaque neurophysiology

Although functional magnetic resonance imaging (fMRI) with sophisticated behavioral paradigms has enabled the investigation of increasingly higher-level cognitive functions in humans, these studies seem to lose touch with neurophysiological studies in macaque monkeys. The application of fMRI and other MRI-based techniques to macaque brains allows studies in the two species to be linked. fMRI in human and macaque subjects using equivalent cognitive tasks enables direct comparisons of the functional brain architecture, even for high-level cognitive functions. Combinations of functional or structural MRI and microelectrode techniques provide ways to explore functional brain networks at multiple spatiotemporal scales. These approaches would illuminate the neurophysiological underpinnings of human cognitive functions by integrating human functional neuroimaging with macaque single-unit recordings.