Keyboard dynamics discrepancies between baseline and deceptive eyewitness narratives

Information manipulation and cognitive load imposition make the production of deceptive narratives difficult. But little is known about the production of deception, and how its mechanisms may help distinguish truthful from deceitful narratives. This study focuses on the measurement of keystroke dynamics while typing truthful and deceptive eyewitness testimonies after a baseline assessment. While typing their narrative, some participants would undergo an auditory cognitive load. Results show that liars typed their story slower, and in less time than the truthful participants when compared to their respective baselines. The imposition of the auditory cognitive load showed adverse results, enhancing the amount of keystrokes and the time necessary to type the narrative. Classification shows better results for deceptive narrative when no auditory cognitive load is imposed. These results are discussed in terms of expanding current models to include the cognition of linguistic production and writing strategies.     

Informative cues can slow search: The cost of matching a specific template

During visual search, observers hold in mind a search template, which they match against the stimulus. To characterize the content of this template, we trained observers to discriminate a set of artificial objects at an individual level and at a category level. The observers then searched for the objects on backgrounds that camouflaged the features that defined either the object’s identity or the object’s category. Each search stimulus was preceded by the target’s individual name, its category name, or an uninformative cue. The observers’ task was to locate the target, which was always present and always the only figure in the stimulus. The results showed that name cues slowed search when the features associated with the name were camouflaged. Apparently, the observers required a match between their mental representation of the target and the stimulus, even though this was unnecessary for the task. Moreover, this match involved all distinctive features of the target, not just the features necessary for a definitive identification. We conclude that visual search for a specific target involves a verification process that is performed automatically on all of the target’s distinctive features.     

On representation hungry cognition (and why we should stop feeding it)

Despite the gaining popularity of non-representationalist approaches to cognition, it is still a widespread assumption in contemporary cognitive science that the explanatory reach of representation-eschewing approaches is substantially limited. Nowadays, many working in the field accept that we do not need to invoke internal representations for the explanation of online forms of cognition. However, when it comes to explaining higher, offline forms of cognition, it is widely believed that we must fall back on internal-representation-invoking theories. In this paper, I want to argue that, contrary to popular belief, we don’t yet have any compelling reason for assuming that non-representationalist theories are, as a matter of necessity, limited in scope. I will show that Clark and Toribio’s influential argument in terms of ‘representation-hungry’ cognition is, for various reasons, flawed. On closer inspection, we’ll see that the argument from representation-hunger (ARH) is, on the one hand, built on an inconsistent notion of representation and, on the other hand, on a conflation of the explanandum with the explanans. I will suggest that, on closer inspection, the ARH seems to be getting its appeal mainly from the unscientific principle that “like causes like”.

     

Task demands determine the specificity of the search template

When searching for an object, an observer holds a representation of the target in mind while scanning the scene. If the observer repeats the search, performance may become more efficient as the observer hones this target representation, or "search template," to match the specific demands of the search task. An effective search template must have two characteristics: It must reliably discriminate the target from the distractors, and it must tolerate variability in the appearance of the target. The present experiment examined how the tolerance of the search template is affected by the search task. Two groups of 18 observers trained on the same set of stimuli blocked either by target image (block-by-image group) or by target category (block-by-category group). One or two days after training, both groups were tested on a related search task. The pattern of test results revealed that the two groups of observers had developed different search templates, and that the templates of the block-by-category observers better captured the general characteristics of the category. These results demonstrate that observers match their search templates to the demands of the search task.     

Effect of hazard warning on workers' attitudes and risk taking behavior.

Until recently, the issue of job hazards has been largely ignored as a research and theoretical topic in business and management disciplines although workers' perceptions and assessments of job hazards are of significance to managers. In this paper are reported results of an experiment conducted in Egyptian chemical firms to test the generality of an implicit rational model used to explain employees' reactions to and perceptions of job hazards. Four hypotheses were tested: (1) workers' subjective estimates of their job hazards are positively related to the objective hazard, (2) workers' subjective estimates of a prospective new job hazard will vary directly with the extent of hazard communicated by the new product label, (3) workers' demand for new hazard wage premiums will vary directly with perceived prospective new work hazards, (4) workers' intention to quit the job will vary directly with subjective and objective estimates of job hazards. All hypotheses were supported. The rational worker model appears to be a general explanation for workers' responses to hazardous jobs and information on hazards. This model not only holds for USA workers but also for those in a nonwestern culture. Implications for management and the industrial setting are discussed.     

Object recognition in dense clutter

Observers in recognition experiments invariably view objects against a blank background, whereas observers of real scenes sometimes view objects against dense clutter. In this study, we examined whether an object's background affects the information used for recognition. Our stimuli consisted of color photographs of everyday objects. The photographs were organized either as a sparse array, as is typical of a visual search experiment, or as high density clutter, such as might be found in a toy chest, a handbag, or a kitchen drawer. The observer's task was to locate an animal, vehicle, or food target in the stimulus. We varied the information in the stimuli by convolving them with a low-pass filter (blur) or a high-pass filter (edge) or converting them to grayscale. In two experiments, we found that the blur and edge manipulations produced a modest decrement in performance with the sparse arrangement but a severe decrement in performance with the clutter arrangement. These results indicate that the information used for recognition depends on the object's background. Thus, models of recognition that have been developed for isolated objects may not generalize to objects in dense clutter.     

The depth of distractor processing in search with clutter

Some search tasks involve looking for a category target in clutter. This is the task faced, for example, by a baggage screener looking for weapons in a suitcase. Such tasks presumably involve the segmentation and recognition of the target object, but it is unknown whether they also involve the segmentation and recognition of the distractor objects. To examine the depth of distractor processing in this task, we had observers search through cluttered displays composed of normal and chimerical distractors. The normal distractors were photographs of recognizable objects, while the chimerical distractors were created by interchanging parts between the normal objects. The obsever's task was to identify the display quadrant that contained an animal or a vehicle target. We varied the difficulty of the search task by varying target and distractor discriminability, target uncertainty, and target occlusion. Only when the target was partially occluded did we find an effect of distractor type. In this case, observers may have found the target through a process of mentally eliminating whole distractor objects. When the target was unoccluded, we found no evidence that observers selected and rejected whole distractors during search. This second result supports our previous claim that often the items for search in clutter are not whole objects.     

Cognitive remediation in pediatric traumatic brain injury

Robinson's (1970) elaborative encoding technique (PQRST) was implemented as the active cognitive intervention strategy to address verbal memory deficits in 2 fourth-grade boys following mild or moderate traumatic brain injury (TBI). A metacognitive reading comprehension technique (Smith & Dauer, 1984) was also implemented for comparison purposes. Single-case methodology was employed using a counter-balanced crossover of the two intervention strategies controlling for the effects of attention. The performance of both boys was significantly better during strategy training with the PQRST technique and approached the performance level of the normal comparison subject. In contrast, the performance of both subjects with TBI remained at, or returned to, baseline levels during the metacognitive intervention. These findings suggest that Robinson's cognitive remediation intervention holds promise in addressing memory and reading comprehension deficits following pediatrie traumatic brain injury. Future research should focus on enhancing generalization and transfer of training to classroom assignments.     

Sufi practices as the cause of spiritual,mental and physical healing at Chishti shrines in Pakistan

The article’s main focus is the performance of Sufi rituals at the Sufi Dargahs (shrines) and the objectives behind that recital. The study tries to locate the reasons behind the visitation of Sufi Dargahs. It is an attempt to find out the reasons devotees visit Sufi Dargahs and conduct Sufi practices and explores the ways the rituals become a source of peace for them. To get the actual findings, anthropological research was conducted and most of the data were collected while visiting the two prominent Chishti Sufi Dargahs of West Punjab, Pakistan: Dargahs of Baba Farid Ganj Shakar and Khawaja Shams ud Din Sialvi. The study is an effort to find out how the culture of Dargah influences the local community actions.