Practice Quiz

Child Psych

Category - Research & Stats

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Suppose you were given the results of a large sample of 11-year-old students, all of whom were given the 4th Edition of the Wechsler Intelligence Scale for Children (WISC-IV). The data were analyzed and, unsurprisingly, a statistically significant correlation was found between scores on the Vocabulary subtest of the WISC-IV and WISC Total IQ. A statistically significant correlation was also found between WISC-IV Vocabulary scores and total years of parents’ schooling. What do these findings tell you?
  1. The higher the parents’ level of education, the higher the IQ of the child.
  2. Children with good vocabularies have higher IQ scores than those with more limited vocabularies.
  3. Parents who hire a tutor to help improve their child’s vocabulary will derive another benefit-a boost in their child’s IQ score.
  4. None of the Above.
Explanation
Answer: D - Even if variable A has a significant correlation with both variable B and variable C, it does not necessarily follow that the same relationship exists between variable B and variable C. For example, there may be a very high correlation between being a girl and need for therapy for depression in adolescence and also a very high correlation between being a girl and having played with dolls as a youngster, but no significant correlation between playing or not playing with dolls and later developing or not developing depression. Also, significant correlations indicate the likelihood of two conditions coexisting; they do not indicate an absolute relationship where neither condition can exist without the other.
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