Little Rina has a favourite toy - a stuffed tiger, which she has named Sheroo. Which stage of cognitive development is Rina in, as per Piaget's theory?

Students are asked to find out how fast a handkerchief dries under different fan speeds, and what the determining factors of this experiment are. Ritesh is the only child who doesn't understand that different degrees of wetness are a factor. Which stage of cognitive development is he possibly in, as per Piaget's theory?

During students' viva voce in a chemistry examination, teachers are strictly told to not give any prompts for answers. Which of Vygotsky's concepts in education would they have been working towards, if they had been allowed to give prompts?

'There is a gap between what a child can do without help and what they cannot do without help. The role of education fills this gap, thereby enabling students to learn new things' - This sentence agrees with the theory of which psychologists?