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Across 4. the developing human organism from 9 weeks after conception to birth. 7. all the mental activities associated with thinking, knowing, remembering, and communicating 9. interpreting our new experiences in terms of our existing schemas 10. The ability to form close, loving relationships; Also, according to Erikson, it is part of the issue dealt with by young adults. 13. The end of menstruation 14. adapting our current understandings to incorporate new information 17. an optimal period early in the life of an organism when exposure to certain stimuli or experiences produces normal development 22. The Swiss psychologist, famous for his work on children's cognition 24. the fear of strangers that infants commonly display 26. biological growth processes that enable orderly changes in behavior, relatively uninfluenced by experience 27. the awareness that things continue to exist even when not perceived 28. The culturally preferred timing of social events such as marriage, parenthood, and retirement 29. the third stage of Piaget's stages of development, during which children gain the mental operations that enable them to think logically about concrete events. 30. A type of research study in which the same people are restudied and retested over a long period

Down 1. A disorder that appears in childhood and is marked by issues with communication, social interaction, and rigid patterns and behaviors (The answer is just the first of three words) 2. agents, such as chemicals and viruses, that can reach the embryo or fetus during prenatal development and cause harm 3. the "we aspect of our self-concept" 5. a sense that the world is predictable and trustworthy 6. people's ideas about their own and other's mental states. 8. the fertizlized egg: This stage lasts 2 weeks 9. a style of parenting in which parents are both demanding and responsive: considered to be the most effective style of parenting 11. Our sense of self; Also, according to Erikson, it is part of the issue dealt with by adolescents 12. The period of sexual maturation, during which a person becomes capable of reproducing 14. an emotional tie with another person 15. the principle that properties such as mass, volume, and number remain the same despite changes in the forms of objects 16. the fourth and final of Piaget's stages of development, during which people begin to think logically about abstract concepts 18. the second of Piaget's stages of development, during which a child learns to use language but does not yet comprehend the mental operations of concrete logic 19. The transition period from childhood to adulthood, extending from puberty to independence 20. the developing human organism from about two weeks after fertilization through the second month. 21. the first of Piaget's stages of development, in which infants know the world mostly in terms of their sensory impressions and motor activities 23. the preoperational child's difficulty taking another's point of view 25. a concept or framework that organizes and interprets information