. . "developmental psychology"@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "developmental psychology"@en . "developmental psychology"@en . . . . . . . . . . . . . "scientific study of changes that occur in human beings over the course of their lives"@en . . . . . . . . . . . . . . . . . . . . . . . . . . .