Learning is defined in psychology as a relatively permanent change in behavior or knowledge resulting from experience.
- (1) is incorrect: Temporary changes due to illness (e.g., fatigue or confusion) are not learning, as they are not permanent or experience-driven.
- (2) is incorrect: Permanent changes due to drugs (e.g., neurological damage) are physiological, not learning, as they are not based on experience.
- (3) is incorrect: While instruction can facilitate learning, the change must be relatively permanent and experience-based, not just deliberate. For example, memorizing something temporarily through instruction does not always qualify as learning unless retained.
- (4) is correct: Learning involves changes that are relatively permanent (i.e., lasting but not necessarily irreversible) and result from experiences, such as practice, observation, or training.
Thus, option (4) is correct.