Frontmatter -- Acknowledgments -- Contents -- Introduction: Hegel, Peirce, and Vygotsky -- Part One: Perception and the model of 'secondary dualism' -- 1 The model of 'secondary dualism' -- 2 Semiotics and 'secondary dualism' -- 3 Hegel, Peirce, and Vygotsky: Models of perception -- Part Two: Concept formation as mediation -- 4 Hegel's template of concept formation -- 5 Peirce: The three categories -- 6 Mediation in Peirce: The structure of the sign -- 7 Mediation in Vygotsky: 'Word meaning' -- Part Three: Concept formation in Peirce and Vygotsky -- 8 Peirce: The classification of signs and the first trichotomy -- 9 The received view of the Peircean icon -- 10 Peirce: Concept formation in the second trichotomy -- 11 Peirce: The third trichotomy -- 12 Vygotsky on concept formation -- Part Four: Peirce: The implications of semiotic concept formation -- 13 Pragmatism, truth and abduction -- 14 Peircean semiotics and learning theory -- References -- Index