differences on class, I will show why these words should not have been spoken. There are two main ways that show how PBS affects a child: long term and short term. In a study, about 250 children were followed for three years, some from age 2 to 5, others from age 4 to 7. In that period, each child was assessed four times in the researchers' offices and four times in the child's home. Each assessment session lasted two hours and included the child's parents. Between visits, the parents were interviewed…
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