The Nature of Working Memory for Braille

Blind individuals have been shown on multiple occasions to compensate for their loss of sight by developing exceptional abilities in their remaining senses. While most research has been focused on perceptual abilities per se in the auditory and tactile modalities, recent work has also investigated higher-order processes involving memory and language functions. Here we examined tactile working memory for Braille in two groups of visually challenged individuals (completely blind subjects, CBS; blind with residual vision, BRV). In a first experimental procedure both groups were given a Braille tactile memory span task with and without articulatory suppression, while the BRV and a sighted group performed a visual version of the task. It was shown that the Braille tactile working memory (BrWM) of CBS individuals under articulatory suppression is as efficient as that of sighted individuals' visual working memory in the same condition. Moreover, the results suggest that BrWM may be more robust in the CBS than in the BRV subjects, thus pointing to the potential role of visual experience in shaping tactile working memory. A second experiment designed to assess the nature (spatial vs. verbal) of this working memory was then carried out with two new CBS and BRV groups having to perform the Braille task concurrently with a mental arithmetic task or a mental displacement of blocks task. We show that the disruption of memory was greatest when concurrently carrying out the mental displacement of blocks, indicating that the Braille tactile subsystem of working memory is likely spatial in nature in CBS. The results also point to the multimodal nature of working memory and show how experience can shape the development of its subcomponents

An investigation into personality and situation in the maintenance if subjective experience in a laboratory

This study investigated the relationship between personality variables, task processing, and the self-report of subjective experience, including thought content, time perception, and awareness of task stimuli. In particular, this study was concerned with dis-entangling the role of environmental and dispositional influences on subjective experience. Thirty-eight participants were engaged in either a memory or a fluency task during which verbal reports of various aspects of subjective experience were recorded. Personality variables were measured using the Self-Consciousness Scale and the Thought Occurrence Questionnaire. The pattern of correlations between specific subjective aspects of attention and dispositional indices suggested that dispositional variables were important in determining subjective experience during the memory task, particularly in the encoding phase. In the fluency task, disposition made a smaller contribution to specific measures of attention, a finding consistent with a self-regulatory framework. Finally, the report of thoughts unrelated to the current situation were proportional to the number of false positives reported in the memory task, supporting the assertion that the quality of phenomenal experience is important in the process of source monitoring

Enterprise Modelling Languages

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