"Surplus energy theory" of play was propounded by:

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Accepted Answer

The correct option is (4):
The "Surplus Energy Theory" of play was famously propounded and popularized by the British philosopher and sociologist Herbert Spencer in the late 19th century, building upon the initial ideas of Friedrich Schiller. This classical theory posits that humans and animals generate more energy than is required for basic life functions and survival, especially the young who are cared for by adults. Play, therefore, is an outlet—a simple, non-purposeful, exuberant activity—to release this stored-up or "surplus" energy. It serves as a mechanism to discharge the physiological tension accumulated from unused physical and mental vitality. This theory explains why young organisms, with their lower work demands, engage in more spontaneous and aimless play than adults.

The incorrect option is (1):
William McDougal is known for his work on the **Instinct Theory of Play**, not the Surplus Energy Theory. The Instinct Theory suggests that play is the expression of various inherited, fixed action patterns or instincts present in humans. This perspective focuses on the innate and emotional drives that are acted out through playful activities. McDougal's focus was on the internal, inherited forces driving behavior, which is fundamentally different from Spencer's focus on the simple discharge of excess, unspent physiological energy.

The incorrect option is (2):
Karl Groose is the proponent of the **Pre-Exercise or Practice Theory of Play**. His theory contrasts sharply with the Surplus Energy idea, as it views play not as a waste of energy but as a serious, preparatory activity. Groos argued that play functions as a necessary mechanism for young organisms to practice and perfect skills that will be vital for survival and adaptation in adulthood, such as hunting, fighting, and nurturing. Thus, Groos viewed play as having a definite biological purpose for future life, which is distinct from the aimless, energy-releasing function described by Spencer.

The incorrect option is (3):
John B. Watson is a central figure in the field of **Behaviorism**, a school of thought that emphasizes the role of environment and conditioning in shaping behavior. Watson's primary contributions are related to learning, classical conditioning, and the belief that most behavior is learned rather than innate or instinctual. He is not credited with proposing any of the classical biological or philosophical theories of play, such as the Surplus Energy Theory, which attempts to explain the origin and fundamental purpose of play in a developmental or evolutionary context.