"The acquisition of new behaviour or the strengthening or weakening of old behaviour as a result of experience is learning." This is defined by :

Question

Accepted Answer

The statement "The acquisition of new behaviour or the strengthening or weakening of old behaviour as a result of experience is learning" is defined by Smith, as indicated by the correct answer, Option 2. Here is a detailed explanation supporting this choice and why the other options are incorrect:

1. **Justification for Option 2 (Smith):**
   - Smith's definition of learning emphasizes the role of experience in acquiring new behaviors or modifying existing ones. This perspective aligns with the understanding that learning is a process influenced by interactions and experiences, which lead to changes in behavior. Smith's approach highlights the dynamic nature of learning, where both the acquisition of new behaviors and the modification of old ones are central to the learning process.

2. **Explanation for why other options are incorrect:**

- **Option 1 (Thorndike):**
     - Edward Thorndike is best known for his work on the Law of Effect, which states that behaviors followed by satisfying consequences are more likely to be repeated, while those followed by unpleasant consequences are less likely to be repeated. While Thorndike's work is foundational in understanding learning, particularly in the context of operant conditioning, his focus was more on the consequences of behavior rather than the broader definition of learning as a result of experience.

- **Option 3 (Sigmund Freud):**
     - Sigmund Freud is primarily associated with psychoanalysis and theories related to the unconscious mind, rather than learning through experience. Freud's work focused on the influence of unconscious processes and childhood experiences on behavior, rather than the acquisition or modification of behavior through experience in the way described in the statement.

- **Option 4 (Pavlov):**
     - Ivan Pavlov is renowned for his research on classical conditioning, particularly his experiments with dogs that led to the discovery of conditioned reflexes. While Pavlov's work is crucial in understanding associative learning, it specifically addresses the formation of associations between stimuli and responses, rather than the broader concept of learning as defined by Smith.

In conclusion, Option 2 (Smith) is the correct answer because it aligns with the definition of learning as a process influenced by experience, encompassing both the acquisition of new behaviors and the modification of existing ones. The other options, while significant in their respective contributions to psychology, do not encapsulate this specific definition of learning.