Examlex
The octave is the interval between one note and a note with either double the frequency or half the frequency of that note.
Homeostasis
The self-regulating process by which biological systems tend to maintain stability while adjusting to conditions that are optimal for survival.
Arousal Theory
A theory suggesting that people are motivated to maintain an optimal level of arousal, which varies from one individual to another.
Maslow's Hierarchy
A theory in psychology proposed by Abraham Maslow that presents a hierarchy of human needs, from basic physiological needs to self-actualization.
Plutchik's Scheme
A psychoevolutionary theory of emotion, proposing eight primary bipolar emotions and their combinations, interactions, and variations.
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