They found that early attention skills were the most consistent predictor of academic success, and that likability by peers also had a modest effect on academic performance. By fifth grade, children with early attention difficulties had lower grades and reading achievement scores than their peers. As fifth-graders, children with early attention problems obtained average reading scores at least 3% lower than their contemporaries’ and grades at least 8% lower than those of their peers. This was after controlling for IQ, socio-economic status and academic skills at school entry. 请根据材料选择正确答案。A、By attaching equal importance to all possible variables examined.B、By collecting as many typical samples as were necessary.C、By preventing them from being affected by factors not under study.D、By focusing on the family background of the children being studied.

How did the researchers ensure that their findings are valid?

    With this study, researchers examined early academic attention and socio-emotional skills and how each contributed to academic success into young adulthood.

    They found that early attention skills were the most consistent predictor of academic success, and that likability by peers also had a modest effect on academic performance. 

    By fifth grade, children with early attention difficulties had lower grades and reading achievement scores than their peers. As fifth-graders, children with early attention problems obtained average reading scores at least 3% lower than their contemporaries’ and grades at least 8% lower than those of their peers. This was after controlling for IQ, socio-economic status and academic skills at school entry. 

请根据材料选择正确答案。

  • A、By attaching equal importance to all possible variables examined.
  • B、By collecting as many typical samples as were necessary.
  • C、By preventing them from being affected by factors not under study.
  • D、By focusing on the family background of the children being studied.

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