Who propounded the 'Two-Factor Theory' of intelligence?

→ While conducting an in-depth analysis of various theories of intelligence, which of the following statements most accurately highlights the fundamental and philosophical difference between Howard Gardner's 'Theory of Multiple Intelligences' and Charles Spearman's 'Two-Factor Theory' in the context of their conceptual frameworks? → Under Charles Spearman's Two-Factor Theory of Intelligence, the concept of General Intelligence ('g' factor)—which posits that the 'g' factor is a universal, innate, and immutable mental energy equally inherent in all types of intellectual tasks, logical problems, and cognitive performances throughout a person's life—holds specific psychological implications for assessing innate intellectual capacity, differentiated instruction, and scientific management of academic achievement in classroom teaching. Which of the following psychological statements is most authentic and scientifically valid regarding this concept? → When conducting a comparative and psychological analysis of various theories of intelligence—such as Spearman's 'Two-Factor Theory', Thurstone's 'Group Factor Theory', and Guilford's 'Structure of Intellect (SI) Model'—which of the following statements most authentically explains the fundamental difference between their structural formats and the organization of intellectual abilities? → In the context of the historical evolution of multidimensional and hierarchical models of intelligence, analyzing Charles Spearman's 'Two-Factor Theory' and Philip Vernon's 'Hierarchical Theory of Intelligence', which of the following best represents the most prominent and fundamental characteristic of Vernon's model? → Under Charles Spearman's 'Two-Factor Theory of Intelligence', the central concept of 'General Intelligence or g-factor' is defined as a universal and innate mental energy required for all cognitive activities, logical analysis, and problem-solving. Which of the following psychological statements is most authentic and scientifically valid regarding its true nature and classroom implications? → Under Charles Spearman's Two-Factor Theory of Intelligence, the 'General Factor' or 'G-Factor' is defined as a universal, innate, and invariable mental energy that is universally active across all intellectual tasks. Which of the following psychological statements is most authentic and scientifically valid regarding its real psychological implications and students' academic performance? → Upon a deep study of the theoretical and analytical differences between Charles Spearman's 'Two-Factor Theory' of intelligence and Louis Thurstone's subsequent 'Group Factor Theory', which of the following statements provides the most accurate and scientific explanation of Thurstone's perspective on 'Primary Mental Abilities'? → Under Raymond Cattell's Trait Theory, analyzing the theoretical difference between 'Surface Traits' and 'Source Traits', which of the following statements most accurately and scientifically highlights the characteristic of 'Source Traits'?