Insects as Gibsonian Animals

Research on the visual behavior of insects has uncovered a number of cues that are used for controlling and stabilizing flight and for extracting information about the structure of the environment. Flies monitor their egomotion and maintain a straight course by sensing the patterns of image motion that are induced in the eyes. Bees flying through a tunnel maintain equidistance to the flanking walls by balancing the speeds of the images of the two walls. This enables them to safely negotiate narrow passages or to fly between obstacles. The speed of flight in the tunnel is controlled by holding constant the average image velocity as seen by the 2 eyes. This ensures that the bee slows down to a safer speed when the passage narrows. Bees landing on a horizontal surface hold constant the image velocity of the surface as they approach it, thus automatically ensuring that flight speed is close to 0 at touchdown. Flies and bees distinguish objects from backgrounds by sensing the relative motion between the images of the object and the background. Ranges of objects are gauged in terms of the speeds of motion of the images of the objects. Foraging bees estimate the distance that they have traveled to reach a food source by integrating the optic flow experienced en route—they possess a visually driven odometer.     

An intelligent task analysis approach for special education based on MIRA

This paper describes a novel approach for generating a logical sequence of tasks in the task analysis process of special education. This approach is based on the formalism MIRA (Mīmā?sā Inspired Representation of Actions), which has the feature of expressing an action as reason, instruction and goal. MIRA also prescribes a set of deduction rules, which helps in the reasoning process of actions. These features are incorporated in this approach and a software tool, namely MIRATaskGen is designed, which facilitates the task analysis process of special education. The software receives various action related inputs along with the start and finish stages and generates a sequence of tasks from the start to the finish. This tool also informs the user, whether the desired goal can be achieved. If the desired goal cannot be achieved, then the sequence of actions from the start to a point of discontinuity is detected.     

The effect of sadness on global-local processing

Gable and Harmon-Jones (Psychological Science, 21(2), 211-215, 2010) reported that sadness broadens attention in a global-local letter task. This finding provided the key test for their motivational intensity account, which states that the level of spatial processing is not determined by emotional valence, but by motivational intensity. However, their finding is at odds with several other studies, showing no effect, or even a narrowing effect of sadness on attention. This paper reports two attempts to replicate the broadening effect of sadness on attention. Both experiments used a global-local letter task, but differed in terms of emotion induction: Experiment 1 used the same pictures as Gable and Harmon-Jones, taken from the IAPS dataset; Experiment 2 used a sad video underlaid with sad music. Results showed a sadness-specific global advantage in the error rates, but not in the reaction times. The same null results were also found in a South-Asian sample in both experiments, showing that effects on global/local processing were not influenced by a culturally related processing bias.     

Explaining effervescence: Investigating the relationship between shared social identity and positive experience in crowds

We investigated the intensely positive emotional experiences arising from participation in a large-scale collective event. We predicted such experiences arise when those attending a collective event are (1) able to enact their valued collective identity and (2) experience close relations with other participants. In turn, we predicted both of these to be more likely when participants perceived crowd members to share a common collective identity. We investigated these predictions in a survey of pilgrims (N = 416) attending a month-long Hindu pilgrimage festival in north India. We found participants' perceptions of a shared identity amongst crowd members had an indirect effect on their positive experience at the event through (1) increasing participants' sense that they were able to enact their collective identity and (2) increasing the sense of intimacy with other crowd members. We discuss the implications of these data for how crowd emotion should be conceptualised.     

Do attitudes toward societal structure predict beliefs about free will and achievement? Evidence from the Indian caste system

Intuitive theories about the malleability of intellectual ability affect our motivation and achievement in life. But how are such theories shaped by the culture in which an individual is raised? We addressed this question by exploring how Indian children's and adults’ attitudes toward the Hindu caste system – and its deterministic worldview – are related to differences in their intuitive theories. Strikingly, we found that, beginning at least in middle school and continuing into adulthood, individuals who placed more importance on caste were more likely to adopt deterministic intuitive theories. We also found a developmental change in the scope of this relationship, such that in children, caste attitudes were linked only to abstract beliefs about personal freedom, but that by adulthood, caste attitudes were also linked to beliefs about the potential achievement of members of different castes, personal intellectual ability, and personality attributes. These results are the first to directly relate the societal structure in which a person is raised to the specific intuitive theories they adopt.     

PC-PVT: A platform for psychomotor vigilance task testing,analysis, and prediction

Using a personal computer (PC) for simple visual reaction time testing is advantageous because of the relatively low hardware cost, user familiarity, and the relative ease of software development for specific neurobehavioral testing protocols. However, general-purpose computers are not designed with the millisecond-level accuracy of operation required for such applications. Software that does not control for the various sources of delay may return reaction time values that are substantially different from the true reaction times. We have developed and characterized a freely available system for PC-based simple visual reaction time testing that is analogous to the widely used psychomotor vigilance task (PVT). In addition, we have integrated individualized prediction algorithms for near-real-time neurobehavioral performance prediction. We characterized the precision and accuracy with which the system as a whole measures reaction times on a wide range of computer hardware configurations, comparing its performance with that of the “gold standard” PVT-192 device. We showed that the system is capable of measuring reaction times with an average delay of less than 10 ms, a margin of error that is comparable to that of the gold standard. The most critical aspect of hardware selection is the type of mouse used for response detection, with gaming mice showing a significant advantage over standard ones. The software is free to download from http://bhsai.org/downloads/pc-pvt/.     

Global processing fosters donations toward charity appeals framed in an approach orientation

People are often influenced by how persuasive appeals are framed. While decisions and preferences seem dependent on the effects of a fit between one’s regulatory focus and the motivational orientation of a message, specific cognitive mechanisms involved are not yet clear. This study investigated how perceptual processing styles (global vs local) linked with the scope of attention (broad vs narrow) influence decisions depending on motivation-dependent framing (approach vs avoidance). We found that a global processing style fits approach-oriented message appeals and fosters monetary allocation toward charities framed in eager motivational terms. We discuss implications of the findings on processing styles in relation to affective versus deliberate modes of processing and the need to address in detail the role of attentional scope-dependent processing styles in decision making.