​In an experiment, the dependent variable is the behavior that is being

​Distinguishing and mastering different motions is to ____ as linking individual motions into a coherent, coordinated whole is to ____.

​Which of the following findings noted in observations of older babies supports the statement that babbling is a precursor to the use of real speech?

​Marcia has started to have difficulty with her nighttime vision, and thus has decided that it is better if she no longer drives after dusk, except in emergency situations. She has asked her friends, with whom she often gets together, if they would mind either (a) getting together at her house more often than normal, or (b) if one of them would mind giving her regular rides to other social events that take place at night. Marcia’s behaviors best demonstrate which model of human development?

​Collette is sitting with her young son Jim, and has placed five jellybeans in front of him. Jim starts to count the beans, and as he points to the beans says, “one, two, three!” He then looks up at Collette and smiles. Jim has not yet mastered the

​Eleven-month-old Oreo loves cookies. One day he sees his mother putting cookies into cups for a party. As he is watching, his mom puts one cookie into the first two cups, two cookies into the next two cups, and three cookies into the last two cups. If Oreo is a normally developing 10-month-old who likes cookies, he will most likely reach for

​The idea that development is determined largely as a result of the manner in which people resolve the conflicts that they face at different ages is the central concept of the ____ theories.

​For 10 to 15% of new mothers, the baby blues extend into months of irritability, feelings of low self-worth and apathy, and sleep and appetite disturbances. This condition, called postpartum ________, can influence a child’s development if it persists.

​Cohort effects are most likely to be a problem when it is difficult to separate the effects of developmental  processes from ____ when examining age effects across a wide range of ages.

​How did Piaget and Vygotsky view the “journey” of cognitive development?