Harmony, Perspective and Triadic Cognition

(New York: Cambridge University Press, 2011)

Chapter 1: Introduction Chapter One introduces all of the main arguments in the chapters that follow. The introduction alone will not convince you of the validity of the triadic argument, but makes the case for thinking that “triadic information-processing” is a serious scientific notion... not metaphysics and not occult numerology, but rather low-level human cognition. Unlike animal brains – that generally get by on dyadic, one-to-one associations – the human brain can handle triads. Read on...	Chapter 2: Human Hearing Chapter Two is the most complete discussion of the musical importance of triadic harmony in the music perception literature thus far. From the early discovery (by Galileo’s father in 1588) of the factor responsible for harmonic tension to the modern psychoacoustical model of harmonic modality, this chapter addresses the question avoided in all the psychology books ostensibly explaining music: Why do major chords elicit positive affect, while minor chords are slightly negative?
Chapter 3: Human Seeing Human beings have visual systems that are virtually identical to those of other primates, but we have an unusual ability to perceive the 3D structure implied in 2D paintings, diagrams and photographs. What is the processing that allows for “pictorial depth perception” (and the many visual illusions that are distortions of normal depth perception)? The answer concerns our ability to see the relations among three objects...	Chapter 4: Human Work Chapter 4 asks the evolutionary question of where our triadic talents first arose. It might be argued that the empirical evidence is too sparse to give firm answers, but some rather hard evidence is available in the form of stone tools. The 2.5 million year trail of stone relics shows that banging one stone into another to make a knife, axe or scraper is where triadic cognition started. And that’s when trimodal (visual, tactile and auditory) association neocortex (BA39, BA40) began to evolve.
Chapter 5: Human Communication That’s all very nice, you say, but human beings are different from other animal species because we use language. Where did THAT come from?! Well, the answer was first proposed by the bête noire of the American intelligentsia, Noam Chomsky. He calls it “Universal Grammar,” but the core insight (ca. 1957) concerns “phrase structure” – which is ... explicitly triadic. Guess what aspect of language bonobos can’t understand.	Chapter 6: Consciousness The “mysterians” – and there are a lot of you out there – want to believe that there is something sexier than boring “cognition” that is special about the human mind. But the “somewhat-less-mysterians” among you will acknowledge the evolutionary continuity of all animal species... and that’s where the consciousness argument begins to make sense. Awareness requires nervous systems containing “excitable cells.” It will sting a little bit, Virginia, but the answer to the consciousness conundrum lies in plain-vanilla neurophysiology.
Chapter 7: Loose Ends Triadic skills among human beings are numerous. The triads involved in social cooperation (“joint attention”) and the “moral mind” are essential to human civilization – and important for the rearing of civilized human beings. But there are also triads involved in face perception, rhythm perception, color perception, subitization, trigonometry, mental rotation, dance, sports, and ... hey, just about anything people are interested in.	Chapter 8: Conclusion “Reductionism” – reducing complex phenomena to their essential components – is what science is all about. For the science of human psychology, it is essential to reduce the phenomena of perception and cognition to their dyadic and triadic (and tetradic?) constituents. It is doable – and need not degenerate into the pseudo-science of pretending to explain the human mind in non-psychological terms – in the terminology of genetics, biochemistry or quantum mechanics, on the one hand, or the lofty notions of religion or occultism, on the other hand.

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