Angry, disgusted, or afraid? Studies on the malleability of emotion perception

ABSTRACT— Current theories of emotion perception posit that basic facial expressions signal categorically discrete emotions or affective dimensions of valence and arousal. In both cases, the information is thought to be directly "read out" from the face in a way that is largely immune to context. In contrast, the three studies reported here demonstrated that identical facial configurations convey strikingly different emotions and dimensional values depending on the affective context in which they are embedded. This effect is modulated by the similarity between the target facial expression and the facial expression typically associated with the context. Moreover, by monitoring eye movements, we demonstrated that characteristic fixation patterns previously thought to be determined solely by the facial expression are systematically modulated by emotional context already at very early stages of visual processing, even by the first time the face is fixated. Our results indicate that the perception of basic facial expressions is not context invariant and can be categorically altered by context at early perceptual levels.     

The Two Faces of Evidentialism

In this paper I hope to demonstrate two different (and seemingly independent) ways of interpreting the tenets of evidentialism and show why it is important to distinguish between them. These two ways correspond to those proposed by Feldman (Philosophy and Phenomenological Research, 60, 667–695, 2000, Evidentialism: Essays in epistemology, Oxford University Press, 2004) and Adler (Midwest Studies in Philosophy, 23, 267–285, 1999, Beliefs own ethics, MIT Press, 2002). Feldman’s way of interpreting evidentialism makes evidentialism a principle about epistemic justification, about what we ought to believe. Adler’s, on the other hand, makes evidentialism a principle about how we come to believe, what it is, broadly speaking, rational for us to believe. Having identified this difference, I consider two complaints levied against evidentialism, namely what I call the threshold problem and what I call the availability problem, and hope to show that: (a) only an independent, bracketed justification principle of evidentialism can deal with those problems; (b) the rationality principle of evidentialism is not in fact independent from the justification principle; (c) the rationality principle is hard to motivate; and that (d) in the final analysis the argument for the justification principle depends on the rationality principle. I thus conclude that although it may be convenient for evidentialists to treat these two principles as independent, such an independence cannot be maintained.

Psychophysics with junctions in real images

Junctions, formed at the intersection of image contours, are thought to play an important and early role in vision. The interest in junctions can be attributed in part to the notion that they are local image features that are easy to detect but that nonetheless provide valuable information about important events in the world, such as occlusion and transparency. Here I test the notion that there are locally defined junctions in real images that might be detected with simple, early visual mechanisms. Human observers were used as a tool to measure the visual information available in local regions of real images. One set of observers was made to label all the points in a set of real images where one edge occluded another. A second set of observers was presented with variable-size circular subregions of these images, and was asked to judge whether the regions were centered on an occlusion point. This task is easy if junctions are visible, but I found performance to be poor for small regions, not approaching ceiling levels until observers were given fairly large (approximately 50 pixels in diameter) regions over which to make the judgment. Control experiments ruled out the possibility that the effects are just due to junctions at multiple scales. Experiments reported here suggest that, although some junctions in real images are locally defined and can be detected with simple mechanisms, a substantial fraction necessitate the use of more complex and global processes. This raises the possibility that junctions in such cases may not be detected prior to scene interpretation.     

Comparison of Hispanic children with and without limited English proficiency on the Naglieri Nonverbal Ability Test

Hispanic children with (n=148) and without (n=148) limited English proficiency were given the Naglieri Nonverbal Ability Test (NNAT; J. A. Naglieri. 1997a) and the Stanford Achievement Test-9th edition (SAT-9: 1995). The groups were selected from the NNAT standardization sample (N=22.620) and matched on geographic region, gender, socioeconomic status, urbanicity. and ethnicity. There was a very small difference (d ratio=0.1) between the NNAT standard scores for the children with limited English proficiency (M - 98.0) and those without limited English proficiency (M=96.7). The NNAT correlated moderately and similarly with achievement for the 2 groups. The sample of children with limited English proficiency earned considerably lower scores on SAT-9 Reading and Verbal subtests. Results suggest that the NNAT may be useful for the assessment of Hispanic children with and without limited English proficiency.     

Developmental and individual differences in pure numerical estimation

The authors examined developmental and individual differences in pure numerical estimation, the type of estimation that depends solely on knowledge of numbers. Children between kindergarten and 4th grade were asked to solve 4 types of numerical estimation problems: computational, numerosity, measurement, and number line. In Experiment 1, kindergartners and 1st, 2nd, and 3rd graders were presented problems involving the numbers 0-100; in Experiment 2, 2nd and 4th graders were presented problems involving the numbers 0-1,000. Parallel developmental trends, involving increasing reliance on linear representations of numbers and decreasing reliance on logarithmic ones, emerged across different types of estimation. Consistent individual differences across tasks were also apparent, and all types of estimation skill were positively related to math achievement test scores. Implications for understanding of mathematics learning in general are discussed.     

The mentalistic basis of core social cognition: experiments in preverbal infants and a computational model

Evaluating individuals based on their pro‐ and anti‐social behaviors is fundamental to successful human interaction. Recent research suggests that even preverbal infants engage in social evaluation; however, it remains an open question whether infants’ judgments are driven uniquely by an analysis of the mental states that motivate others’ helpful and unhelpful actions, or whether non‐mentalistic inferences are at play. Here we present evidence from 10‐month‐olds, motivated and supported by a Bayesian computational model, for mentalistic social evaluation in the first year of life.A video abstract of this article can be viewed at http://youtu.be/rD_Ry5oqCYE     

The Development of Specialized Brain Systems in Reading and Oral-Language

Functional magnetic resonance imaging (fMRI) was used to examine differences between children (9–12 years) and adults (21–31 years) in the distribution of brain activation during word processing. Orthographic, phonologic, semantic and syntactic tasks were used in both the auditory and visual modalities. Our two principal results were consistent with the hypothesis that development is characterized by increasing specialization. Our first analysis compared activation in children versus adults separately for each modality. Adults showed more activation than children in the unimodal visual areas of middle temporal gyrus and fusiform gyrus for processing written word forms and in the unimodal auditory areas of superior temporal gyrus for processing spoken word forms. Children showed more activation than adults for written word forms in posterior heteromodal regions (Wernicke's area), presumably for the integration of orthographic and phonologic word forms. Our second analysis compared activation in the visual versus auditory modality separately for children and adults. Children showed primarily overlap of activation in brain regions for the visual and auditory tasks. Adults showed selective activation in the unimodal auditory areas of superior temporal gyrus when processing spoken word forms and selective activation in the unimodal visual areas of middle temporal gyrus and fusiform gyrus when processing written word forms.     

Conceptual Conservatism and Contingent Composition

This paper proposes a novel answer to the Special Composition Question. In some respects it agrees with brutalism about composition; in others with universalism. The main novel feature of this answer is the insight I think it gives into what the debate over the Special Composition Question is about.