Summary

Portrait of Boris Sidis Boris Sidis The Foundations of Normal and Abnormal Psychology… (1914 | notes)

Biologically regarded, we can well see the importance of the central nuclear elements, the necessity of their standing out in consciousness as more prominent and more intense than the rest of the sensory elements. Constituting the signal, they come to be the most significant part of the percept, for they announce what 'that' is, they present the object, friend or foe, something to welcome or something to flee from. The central nuclear elements thus come to present objective reality, they safeguard the individual, they are the safety as well as the danger signal.
Source: Wikisource

Portrait of Boris Sidis Boris Sidis The Foundations of Normal and Abnormal Psychology… (1914 | notes)

In the struggle for existence the animal organism must on pain of death be adjusted to the objects of its external world. Now the central, nuclear, sensory elements awakened by external excitations give the cue for the reaction; they form the sensitive organization for the release of motor energy in definite directions; they signify a definite object to which correspond it , definite motor tendencies with final reactions of adjustment. To the mouse the cat is not an object of contemplation or an object of observation, on account of its sensory effects,―the cat is an object to run away from.
Source: Wikisource

Portrait of Boris Sidis Boris Sidis The Foundations of Normal and Abnormal Psychology… (1914 | notes)

The affective state of the percept is not always obvious in cases of fleeting percepts, but it becomes manifest, when the central elements become temporarily fixed, the stress and strain of consciousness tending in one direction. The very changes occurring in the flickering intensity of the nuclear elements tend to sharpen the situation, to enliven the interest, strain the attention, and be all agog so to say. The cat getting a glimpse of a mouse, or the dog catching sight of the cat may be taken as good illustrations of the affective states present in perceptual consciousness.
Source: Wikisource

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