Concept-formation according to Rand. A personal adaptation (and two extra phases)

In her «Introduction to Objectivist epistemology» (1990) Ayn Rand shows us how concepts are formed. She identifies three stages: the sensorial, perceptual and conceptual stage. Sensations stimuli impinging on senses that cannot be retained by man’s memory, nor can experienced in pure isolation. They always together with other sensations automatically integrated whole she calls percepts. This automatic integration is performed our subconsciousness. The last step a conscious, volitional of these percepts focused conscious-ness, yielding concepts.
 Her description process (p. 6) makes notice first stage as being aware objects, which ascribes concept «entity», followed «closely allied» child detects «specific, particular things» con-cept «identity». then goes ascribing «unit» third stage, objects similar traits grouped, abstracted their essential, distinguishing characteristic.