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Individuals with severe speech and language impairment as a result of chronic severe Broca's aphasia may rely on non‐speech communication aids to augment or replace speech. These aids include speech‐generating devices and graphic symbol software programs that produce synthetic speech upon activation. Previous research has indicated that individuals with chronic severe Broca's aphasia are able to identify, manipulate, and combine graphic symbols to produce simple phrases and sentences. The primary aim of this study is to evaluate the ability of three individuals with chronic severe Broca's aphasia to produce graphic symbol sentences of varying levels of complexity using a speech generating device. A single‐subject multiple‐baseline design across behaviours replicated across three participants was used to assess the effect of AAC intervention on the production of sentences using graphic symbols. Findings indicated that individuals with chronic severe Broca's aphasia were able to combine graphic symbols to produce sentences of varying levels of complexity. The results of this study suggest that technologically‐based AAC intervention approaches can be effective in facilitating communication for individuals with chronic severe Broca's aphasia. The overall findings are discussed in terms of clinical and public policy implications.

Today, there is a global need for more effective leaders. The purpose of this paper is to present a model of human development which covers the psychological, physiological, and sociological dimensions of leadership.

The authors review three research studies in which they have investigated the relationships between consciousness, psycho‐physiological integration, and leadership performance using physiological measures, psychological tests, and self‐reports.

These studies support the model that leadership ability is closely related to psycho‐physiological refinement – the authors found that higher integration of the electrical brain activity, more mature moral reasoning, and more frequent peak experiences are found in top performers compared to average performers.

The high frequency of peak experiences among top performers reveals the importance of such gratifying inner experiences for the business community.

The research suggests that practical methods for psycho‐physiological refinement – such as the widely researched Transcendental Meditation technique – can be useful in developing more effective leadership. The brain integration scale presented here may be a reliable objective instrument for assessing an individual's leadership and performance capacity.

A unique contribution of the authors' research is to recognize that integrity – an essential requisite for leadership – has a physiological counterpart in the integration seen in the functioning of the brain through electroencephalography.