Final answer:
Berkeley's version of idealism is known as immaterialism or subjective idealism, where physical objects do not exist outside of mental perception and are ideas in the mind of God.
Step-by-step explanation:
George Berkeley's version of idealism is often referred to as immaterialism or subjective idealism. Berkeley's fundamental assertion is that physical objects do not exist independently of the mind that perceives them. To Berkeley, only minds and their ideas exist, and the perception of physical objects is a result of God's mind causing sensations within human minds. Moreover, Berkeley challenged the notion of matter existing autonomously outside the mind, a thought contrary to the beliefs of some empiricists like Locke. In Berkeley's view, material objects are essentially ideas in the mind of God, and our sensory perception of them is due to God's will. Berkeley's philosophy revolves around the idea that our existence and sensations are intertwined with God's perception, leading to his famous dictum, esse est percipi, or 'to be is to be perceived'.