It is argued that autobiographical texts, such as life-historical interviews, provide the richest possible source of information about a person's temporality and a culture's historical past. It is proposed that time-consciousness can be inferred from such texts. To this end, ethnographic and other studies of Australian Aboriginal time-consciousness were used to construct a seven-part model of patterned-cyclical time-consciousness. Turning these seven attributes of patterned-cyclical time-consciousness into their opposites yields seven features of one-dimensional, ordinary-linear time-consciousness, thereby establishing a structured temporal polarity. A lexical-level, content-analytic methodology, Neurocognitive Hierarchical Categorization Analysis (NHCA), is introduced, in which folk-concepts of time from Roget's International Thesaurus were used to construct wordlist indicators for 9 of the 14 definitional components. Then, using NHCA for a comparative analysis of texts consisting of life-historical interviews, earlier results of an empirical study were briefly re-presented. Australian Aborigines, compared to Euro-Australian controls, used a significantly smaller proportion of words for an index of ordinary-linear time but a higher proportion of words for an index of patterned-cyclical time, indicating a time-consciousness that is primarily patterned-cyclical rather than linear. Females were less linear and more patterned-cyclical than males in both cultures. These cross-cultural results contribute predictive validity to the proposed polarity of time-consciousness. Implications for the culture-and-cognition paradox and its resolution in dual-brain theory are addressed.