What quality did Descartes attribute to the psychological world?

Descartes is best known for his dualistic view of the mind and body, where he posited that the mind (or soul) is immaterial and distinct from the physical body. He believed that the psychological world operates under a set of perfect, rational principles that are not bound by physical limitations, thereby attributing an immaterial and perfect quality to it. This perspective allows for the existence of ideas and thoughts that do not necessarily correspond to material reality, emphasizing the notion that the realm of the mind is governed by higher, abstract truths rather than the chaotic imperfections present in the physical world. This foundational idea laid the groundwork for later philosophical and psychological explorations regarding consciousness and cognition.

The other options do not accurately reflect Descartes' view. "Rational and spatial" does not capture his emphasis on the immaterial nature of the mind. "Imperfect and material" contrasts his belief in the mind's perfect qualities, while "observable and quantifiable" aligns more with empirical scientific approaches that Descartes did not apply to the psychological realm in his explorations.