Bio-inspired computational object classification model for object recognition

Human beings can effortlessly perceive stimuli through their sensory systems to learn, understand, recognize and act on our environment or context. Over the years, efforts have been made to enable cybernetic entities to be close to performing human perception tasks; and in general, to bring artificial intelligence closer to human intelligence.Neuroscience and other cognitive sciences provide evidence and explanations of the functioning of certain aspects of visual perception in the human brain. Visual perception is a complex process, and its has been divided into several parts. Object classification is one of those parts; it is necessary for carrying out the declarative interpretation of the environment. This article deals with the object classification problem.In this article, we propose a computational model of visual classification of objects based on neuroscience, it consists of two modular systems: a visual processing system, in charge of the extraction of characteristics; and a perception sub-system, which performs the classification of objects based on the features extracted by the visual processing system.With the results obtained, a set of aspects are analyzed using similarity and dissimilarity matrices. Also based on the neuroscientific evidence and the results obtained from this research, some aspects are suggested for consideration to improve the work in the future and bring us closer to performing the task of visual classification as humans do.     

The mediational role of executive functions for the relationship between motor ability and academic performance in pediatric cancer survivors

IntroductionPediatric Cancer Survivors (PCS) bear a high risk for late effects within motor abilities (MAs) and executive functions (EFs). In typically developing children, these domains are interrelated and predictors of academic performance. The current study investigated (i) whether MAs and EFs are also interrelated in PCS, and (ii) whether EFs mediate the relation between MAs and academic performance.Methods78 PCS (7–16 years; M = 11.23; SD = 2.49) participated in this study. Three MAs were assessed: coordination and strength (using the German Motor Test) and endurance (using a cycle ergometer test). EFs were assessed: inhibition and cognitive flexibility (Color-Word Interference Test) and working memory (Block Recall test); and academic performance by questionnaire asking for children’s grade point average.ResultsPearson correlations revealed associations of coordination and strength with EFs and associations of all three MAs with academic performance. A multiple regression model revealed that among the three MAs, coordination was the only significant predictor of EFs (β = 0.42, p = .001). Lastly, mediation analyses revealed that the association of MAs with academic performance was mediated by EFs (indirect effect: β = 0.167, p = .003). Regarding individual motor abilities, this was only true for coordination and strength, but not for endurance.ConclusionResults show that MAs and EFs are interrelated in PCS and that EFs mediate the relationship between coordination and strength with academic performance. This may be important for the design of future physical activity interventions to improve MAs, EFs and academic performance.     

The role of mental rotation in TetrisTM gameplay: An ACT-R computational cognitive model

The mental rotation ability is an essential spatial reasoning skill in human cognition and has proven to be an essential predictor of mathematical and STEM skills, critical and computational thinking. Despite its importance, little is known about when and how mental rotation processes are activated in games explicitly targeting spatial reasoning tasks. In particular, the relationship between spatial abilities and Tetris^TM has been analysed several times in the literature. However, these analyses have shown contrasting results between the effectiveness of Tetris-based training activities to improve mental rotation skills. In this work, we studied whether, and under what conditions, such ability is used in the Tetris^TM game by explicitly modelling mental rotation via an ACT-R based cognitive model controlling a virtual agent. The obtained results show meaningful insights into the activation of mental rotation during game dynamics. The study suggests the necessity to adapt game dynamics in order to force the activation of this process and, therefore, can be of inspiration to design learning activities based on Tetris^TM or re-design the game itself to improve its educational effectiveness.     

Repression in chronic pain: An idea worth recovering

Repression, defined as a process by which threatening information is kept out of conscious awareness, has long been a topic in the chronic pain literature. Emerging in psychodynamic theories, chronic pain is thought to arise from repressed emotions that are converted into physical symptoms; this notion seems to account for much anecdotal evidence and has received empirical support from work with Minnesota Multiphasic Personality Inventory (Hathaway & McKinley, 1943) profiles—particularly the conversion-V. However, the construct validity of this profile among pain patients has been called into question. The emergence of the cognitive-behavioral model of chronic pain ignited a proliferation of research, but because it rejected psychodynamic pain theory, investigation of repression was largely suspended. This lapse leaves unexplained—almost unrecognized—findings that a plurality of chronic pain patients are characterized by constrained emotion, and that repressed, inhibited, and denied negative emotions or traumatic memories have a profound impact on chronic pain. To address these important phenomena and to reinvigorate research, three methods are proposed: (a) expand current empirical clustering procedures, which rely on the Multidimensional Pain Inventory (Kerns, Turk, Rudy, 1985) with measures of defensiveness to isolate patients who report high pain/disability and deny negative affect; (b) employ Weinberger and colleagues' 1979 1990 “repressive style” to examine the responses of repressor pain patients; (c) pursue Pennebaker and colleagues' 1986 1988 theory about disclosure of traumatic events to examine effects of inhibition and disinhibition on persistent pain. Although an integrated model may be premature, it is argued that repression should receive renewed appreciation; it was never really absent, just forgotten.     

An integrated model of eye movements and visual encoding

Recent computational models of cognition have made good progress in accounting for the visual processes needed to encode external stimuli. However, these models typically incorporate simplified models of visual processing that assume a constant encoding time for all visual objects and do not distinguish between eye movements and shifts of attention. This paper presents a domain-independent computational model, EMMA, that provides a more rigorous account of eye movements and visual encoding and their interaction with a cognitive processor. The visual-encoding component of the model describes the effects of frequency and foveal eccentricity when encoding visual objects as internal representations. The eye-movement component describes the temporal and spatial characteristics of eye movements as they arise from shifts of visual attention. When integrated with a cognitive model, EMMA generates quantitative predictions concerning when and where the eyes move, thus serving to relate higher-level cognitive processes and attention shifts with lower-level eye-movement behavior. The paper evaluates EMMA in three illustrative domains — equation solving, reading, and visual search — and demonstrates how the model accounts for aspects of behavior that simpler models of cognitive and visual processing fail to explain.     

The Indifference Function

Abstract

Data from 2 studies conducted in the United States—1 with high school students and 1 with college students—are reported. Two-hundred forty-one multiethnic/multiracial youths (also termed biethnic/biracial, mixed ethnic/mixed racial, and interracial) were selected using 2 large surveys and compared with 1,041 of their monoethnic peers. Although more than 10% of the students across both studies were multiethnic, less than one third of these respondents labeled themselves as such. Ethnic self-labels varied with setting, type of question, and parental ethnicity. Multiethnic youths did not differ from monoethnics regarding self-esteem. In some cases, multiethnic students had more positive attitudes toward other groups than moneethnics did.     

Coping Style Following Acute Stress in Competitive Sport

Abstract

The purpose of this study was to ascertain coping styles among competitive athletes in response to various acute stressors. Specifically, the authors used a 134-item survey to measure approach and avoidance coping styles, with task-focused and emotion-focused coping tendencies nested hierarchically as subdimensions under each. Australian and U.S. college-aged participants indicated the extent to which they used approach, avoidance, task-focused, and emotion-focused coping strategies (a 4-factor model) in response to selected acute stressors experienced during sport competition. The authors computed confirmatory factor analysis to test the theoretically driven model. The criterion loading of .30 and above for each of the factors reduced the survey to 65 items. Findings indicated stronger links between the 2 approach constructs of task- and emotion-focused coping than between the 2 avoidance constructs of those subdimensions. The goodness-of-fit indices for the 4-factor model were 0.58 and 0.57 for Australian and U.S. samples, respectively, and .71 overall. Concomitant low correlations between the 2 approach (0.18) and the 2 avoidance dimensions (0.43) reflected relatively high residuals between stressors. In general, psychometric analyses suggest that coping style may be more prevalent in some situations than others, lending partial support for the transactional model of coping.     

Are modern health worries associated with somatosensory amplification,environmental attribution style,and commitment to complementary and alternative medicine?

Relationship among modern health worries (MHWs), somatosensory amplification (SSA), and attributional styles was investigated in a cross-sectional questionnaire study. A total of 99 university students, 104 patients visiting their General Practitioners, and 102 future alternative therapists completed questionnaires assessing MHWs, SSA, negative affect (NA), and psychological, somatic and normalizing (environmental) attribution styles. Significant correlation between SSA and MHWs was found in all three samples. MHWs and psychological attribution style were significantly associated with Complementary and Alternative Medicine (CAM)-orientation in the regression equation even after controlling for SSA, NA, and sociodemographic variables. MHWs were independent from any attribution styles in the student and patient samples, while significant correlations with all three styles were found in the CAM group. Previously described association between MHWs and SSA was replicated in three different samples. The connection between MHWs and CAM preference seems to be independent from SSA, NA or any particular attribution style.     

Individual differences in reappraisal ability: Links to reappraisal frequency, well-being, and cognitive control

Reappraisal is generally viewed as an adaptive emotion regulation strategy. Reappraisal frequency has been associated with greater well-being, and reappraisal ability is thought to be composed of several crucial cognitive control processes. However, the relationships among reappraisal ability, reappraisal frequency, well-being, and various cognitive control processes have not yet been determined. In this study, we experimentally examined individual differences in reappraisal ability (RA), and also assessed reappraisal frequency, well-being, and several cognitive control processes. We observed a positive relationship between RA, reappraisal frequency, and well-being. RA was also related positively to working memory capacity and set-shifting costs, and marginally related to abstract reasoning. These findings have important implications for understanding the cognitive components and affective outcomes of RA.     

A forced-attention dichotic listening fMRI study on 113 subjects

We report fMRI and behavioral data from 113 subjects on attention and cognitive control using a variant of the classic dichotic listening paradigm with pairwise presentations of consonant-vowel syllables. The syllable stimuli were presented in a block-design while subjects were in the MR scanner. The subjects were instructed to pay attention to and report either the left or right ear stimulus. The hypothesis was that paying attention to the left ear stimulus (FL condition) induces a cognitive conflict, requiring cognitive control processes, not seen when paying attention to the right ear stimulus (FR condition), due to the perceptual salience of the right ear stimulus in a dichotic situation. The FL condition resulted in distinct activations in the left inferior prefrontal gyrus and caudate nucleus, while the right inferior frontal gyrus and caudate were activated in both the FL and FR conditions, and in a non-instructed (NF) baseline condition.