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Abstract

This paper introduces the Integrated Spectrum of Intelligence (ISI), a triadic model that reconceptualizes human intelligence as comprising Intelligence Quotient (IQ), Social Quotient (SQ), and Introspective Aptitude (IA). While conventional paradigms emphasize cognitive performance and social fluency, ISI centers IA as the keystone faculty—defined as the capacity for moral discernment, internal coherence, and existential responsibility. Grounded in both psychological theory and theological insight, IA is framed as a distinct dimension of intelligence: conceptually rigorous, potentially trainable, and plausibly rooted in neurobiological structures. The manuscript critiques dominant intelligence models for their neglect of conscience, volition, and the moral self, offering ISI as a more humanistic and ethically attuned framework. It also introduces the Introspective Cognition and Aptitude Test (ICAT), a developing instrument designed to assess IA through reflective reasoning, ethical judgment, and self-confrontation. By integrating insights from clinical psychology, moral philosophy, and spiritual formation, ISI advances a transformative understanding of intelligence—one that moves beyond performance to meaning, reclaiming the soul as a vital domain of psychological inquiry.

Keywords

introspective aptitude integrated intelligence moral cognition psychological integration spiritual discernment conscience self-regulation

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The Forgotten Faculty: Reclaiming the Soul Through Introspective Aptitude

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