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Which approach to development suggests that there are five levels of the environment that simultaneously influence individuals?

In Western culture, what age is considered the start of young adulthood?

The introduction of an unpleasant or painful stimulus, or the removal of a desirable stimulus that decreases the probability that a preceding behavior will occur in the future, is considered __________.

Explain why developmental researchers employ the cognitive perspective.

__________ conditioning, in which the response being conditioned is voluntary and purposeful, differs from __________ conditioning, in which the response is automatic.

Cognitive psychologist Jean Piaget speculated that human thinking is organized into mental patterns that represent behaviors and actions, patterns that he referred to as __________.

Using a real-world setting for an experiment is the hallmark of a(n) __________.

Which period is considered a social construction and does not have a clear-cut boundary?

__________ theories assume that people are affected by the environmental stimuli to which they are exposed and that developmental change is __________.

In an experiment, the __________ is what researchers manipulate.