Paranoia, self-deception and overconfidence

Self-deception, paranoia, and overconfidence involve misbeliefs about the self, others, and world. They are often considered mistaken. Here we explore whether they might be adaptive, and further, whether they might be explicable in Bayesian terms. We administered a difficult perceptual judgment task with and without social influence (suggestions from a cooperating or competing partner). Crucially, the social influence was uninformative. We found that participants heeded the suggestions most under the most uncertain conditions and that they did so with high confidence, particularly if they were more paranoid. Model fitting to participant behavior revealed that their prior beliefs changed depending on whether the partner was a collaborator or competitor, however, those beliefs did not differ as a function of paranoia. Instead, paranoia, self-deception, and overconfidence were associated with participants’ perceived instability of their own performance. These data are consistent with the idea that self-deception, paranoia, and overconfidence flourish under uncertainty, and have their roots in low self-esteem, rather than excessive social concern. The model suggests that spurious beliefs can have value–self-deception is irrational yet can facilitate optimal behavior. This occurs even at the expense of monetary rewards, perhaps explaining why self-deception and paranoia contribute to costly decisions which can spark financial crashes and devastating wars.

The Noumenal Morass: Post-Kantian Representationalism and Its Relationalist Critique in the Light of Strong Disjunctivism

This epistemological essay addresses the issue of representational content’s existence in the case of true direct knowledge. Contrary answers to it are considered as a basis for the distinction between representationalism and relationalism. The first part of the essay contains a critical analysis of the fundamental features of German Idealism as a kind of representationalism, which determined the main epistemological trend of continental philosophy in the form of post-Kantian representationalism. In the second part, after a brief excursion into certain contemporary continental issues, the current discussion between representationalism and relationalism in analytical philosophy is considered. It is concluded that relationalism, while correctly recognizing the nature of direct perception as being without representational content, is incapable of ensuring the unity of direct perception and a perceptual judgment, and a solution is proposed that could lead out of this epistemological impasse.

Phonetic fusion in Chinese conversational speech

This paper presents a corpus-based perspective on the phonetic fusion of disyllabic words in a Chinese conversational speech corpus. Four categorical types that reflect the phonological features of reduction degrees are automatically derived from gradient, acoustic properties. A transcription experiment is conducted with the most common disyllabic words. Both automatic derivation by acoustic signals and human transcription by perceptual judgment refer to the same sound inventory. We have shown that the complete form of fusion occurring in conversation need not be legitimate syllables and it appears consistently in the form of syllable merger that represents a group of phonetic variants.

Effects of color–emotion association on facial expression judgments

Color and emotion are metaphorically associated in the human mind. This color–emotion association affects perceptual judgment. For example, stimuli representing colors can affect judgment of facial expressions. The present study examined whether colors associated with happiness (e.g., yellow) and sadness (e.g., blue and gray) facilitate judgments of the associated emotions in facial expressions. We also examined whether temporal proximity between color and facial stimuli interacts with any of these effects. Participants were presented with pictures of a happy or sad face against a yellow-, blue-, or gray-colored background and asked to judge whether the face represented happiness or sadness as quickly as possible. The face stimulus was presented simultaneously (Experiment 1) or preceded for one second by the colored background (Experiment 2). The analysis of response time showed that yellow facilitated happiness judgment, while neither blue nor gray facilitated sadness judgment. Moreover, the effect was found only when the face and color stimuli were presented simultaneously. The results imply that the association of sadness with blue and gray is weak and, consequently, does not affect emotional judgment. Our results also suggest that temporal proximity is critical for the effect of the color–emotion association (e.g., yellow–happiness) on emotional judgment.

GENDER DIFFERENCES WHILE PERFORMING AN EVERYDAY PERCEPTUAL-MOTOR TASK

Purpose of the study: The aim of this paper was to study gender differences regarding their perceptual judgment and movement behavior in the road crossing task. Methodology: A simulated road crossing environment outside the Human Motor Behavior laboratory (HMBL) was used to examine the individuals’ perceptual-motor behavior. Twenty-four young adults performed the road crossing task in the virtual environment judging whether the available gap was crossable or not crossable and then initiating movement depending on the perceptual information. Main Findings: Participants’ gap selection revealed that their cross-ability was influenced by vehicle speed, however, female participants made more errors relative to males. In addition, females took longer to cross and made unnecessary adjustments during crossings. The study findings suggest that females’ erroneous perceptual decisions and inconsistent locomotion behavior in road-crossing put them at higher risk relative to their male counterparts. Application of this study: The findings of this study may apply to developing training programs regarding pedestrian individuals. Training with performing road-crossing tasks may prove to be helpful for refining individuals’ perceptual judgment and movement behavior to minimize chances of accidents in road crossing. Specifically, having experience with the road-crossing task in a virtual environment may reduce the tendency towards risk-taking behavior. The novelty of this study: Most of the past research regarding pedestrian individuals’ road crossing behavior examined participants’ perceptual judgment (perception) in standing position only or did not analyze movement behavior in the actual walking set up. The approach utilized in our experiment was novel in this regard; individuals can choose to cross a gap and walk wearing a head-mounted display.

Urgent Decision Making: Resolving Visuomotor Interactions at High Temporal Resolution

Measuring when exactly perceptual decisions are made is crucial for defining how the activation of specific neurons contributes to behavior. However, in traditional, nonurgent visuomotor tasks, the uncertainty of this temporal measurement is very large. This is a problem not only for delimiting the capacity of perception, but also for correctly interpreting the functional roles ascribed to choice-related neuronal responses. In this article, we review psychophysical, neurophysiological, and modeling work based on urgent visuomotor tasks in which this temporal uncertainty can be effectively overcome. The cornerstone of this work is a novel behavioral metric that describes the evolution of the subject's perceptual judgment moment by moment, allowing us to resolve numerous perceptual events that unfold within a few tens of milliseconds. In this framework, the neural distinction between perceptual evaluation and motor selection processes becomes particularly clear, as the conclusion of one is not contingent on that of the other. Expected final online publication date for the Annual Review of Vision Science, Volume 7 is September 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

Colors and Handles: How Action Primes Perception

How deeply does action influence perception? Does action performance affect the perception of object features directly related to action only? Or does it concern also object features such as colors, which are not held to directly afford action? The present study aimed at answering these questions. We asked participants to repeatedly grasp a handled mug hidden from their view before judging whether a visually presented mug was blue rather than cyan. The motor training impacted on their perceptual judgments, by speeding participants’ responses, when the handle of the presented mug was spatially aligned with the trained hand. The priming effect did not occur when participants were trained to merely touch the mug with their hand closed in a fist. This indicates that action performance may shape the perceptual judgment on object features, even when these features are colors and do not afford any action. How we act on surrounding objects is therefore not without consequence for how we experience them.