The three ethical principles discussed in the Belmont Report are: Privacy, Confidentiality, Equitable Selection of Subjects Informed Consent, Institutional Assurance, Researcher Responsibility Respect for Persons, Beneficence, Justice IRB review, Federal Regulations, Declaration of Helsinki

What was piaget's explanation as to why preschool-age children in the preoperational stage make errors on tasks requiring conservation? a) preschool children's tendency toward centration prevents them from focusing on other relevant features of a situation b) preschool children have not yet developed numerical understanding; therefore, different amounts are meaningless c) preschool children's neural-visual network is not fully matured d) preschool children have not lived long enough and accrued enough experience to know the difference between quantities