Learning emergent behaviours for a hierarchical Bayesian framework for active robotic perception

In this research work, we contribute with a behaviour learning process for a hierarchical Bayesian framework for multimodal active perception, devised to be emergent, scalable and adaptive. This framework is composed by models built upon a common spatial configuration for encoding perception and action that is naturally fitting for the integration of readings from multiple sensors, using a Bayesian approach devised in previous work. The proposed learning process is shown to reproduce goal-dependent human-like active perception behaviours by learning model parameters (referred to as "attentional sets") for different free-viewing and active search tasks. Learning was performed by presenting several 3D audiovisual virtual scenarios using a head-mounted display, while logging the spatial distribution of fixations of the subject (in 2D, on left and right images, and in 3D space), data which are consequently used as the training set for the framework. As a consequence, the hierarchical Bayesian framework adequately implements high-level behaviour resulting from low-level interaction of simpler building blocks by using the attentional sets learned for each task, and is able to change these attentional sets "on the fly," allowing the implementation of goal-dependent behaviours (i.e., top-down influences).     

What determines the eyes’ landing position in words?

The place at which the eyes first fixate in a word during continuous reading, called thepreferred landing position(PLP), is usually located halfway between the beginning and the middle of the word. To propose a mechanism that might account for the off-center location of the PLP, six eye movement experiments were conducted using a lexical decision task (Experiment 1) and a stimulus bisection task (Experiments 2–6). The type of stimulus—linguistic (words and nonwords) versus nonlinguistic (strings of hashes, dotted lines, and solid lines)—and the stimulus presentation side (left vs. right) were manipulated. The results showed that (1) stimulus discreteness versus continuousness is an important factor in saccade computation and (2) PLP asymmetry can be explained in terms of attentional and/or oculomotor processes.     

"Trust me...": psychological and behavioral predictors of perceived physician empathy

A sociocognitive model of distal and proximal predictors of empathic judgments was tested among 100 physicians. The authors hypothesized that physician perceived control would affect empathy ratings via physician communication style. Specifically, physicians with high perceived control would use more open communication and be rated as more empathic. Physicians with low perceived control would use a controlling communication style and be rated as less empathic. Physicians completed a medical attribution questionnaire prior to a structured patient consultation exercise, during which patients and assessors rated physician empathy. The exercise was audiotaped, transcribed, and content analyzed for verbal behaviors. Support was found for the hypotheses; however, patients, but not medical assessors, associated empathy with reassurance and provision of medical information.     

Female workers' acceptance in traditionally male-dominated blue-collar jobs

This study examined possible differential treatment by and negative attitudes of civilian male co-workers and male supervisors toward civilian female workers in traditionally male-dominated blue-collar jobs. Surveys were completed by 53 male supervisors and 327 male co-workers of four departments of a large government agency. Male supervisors indicated they would not treat female employees differently than they have treated male employees. Male co-workers, however, reported they have treated other male co-workers more favorably than they would treat female co-workers. In addition, supervisors, compared with male co-workers, reported more favorable attitudes toward female workers.     

The impact of environmental noise on mealtime social interactions in a residential facility for persons with mental retardation

Four levels of environmental noise were experimentally manipulated during lunch and dinner in a residential living unit for 10 behaviorally disordered persons with mental retardation. During the highest noise conditions, there appeared to be some suppression of social interaction between these people, while interaction rates were uniformly higher during softer noise conditions. This effect was evident at both lunch and dinner. Staff members were less affected by the fluctuation in noise levels, although lunchtime staff engaged in more interactions with clients when both the radio and TV were played softly.