Maximum average cost of shower pans: $700. Minimum average cost of shower pans: $200. Shower pans vary in cost primarily based on their size, the material used in their construction and any applicable warranty they might carry. Larger shower pans are invariably more expensive.
Behaviour operates on the environment to bring about favorable consequences or avoid adverse ones. These same ideas of operant conditioning can also be applied to language acquisition because Skinner believed that language could be treated like any other kind of cognitive behaviour. According to the behaviourist theory, language learning is a process of habit formation that involves a period of trial and error where the child tries and fails to use correct language until it succeeds.
Cognitive development is Jean Piaget's theory. Through a series of stages, Piaget proposed four stages of cognitive development: the sensorimotor, preoperational, concrete operational and formal operational period. The sensorimotor stage is the first of the four stages in cognitive development which extends from birth to the acquisition of language.