Second Grade and Ninth Grade students were given an IQ test, with no special information given to their teachers. The teachers were then told that some of their students were about to have an "intellectual growth spurt." The students then had their IQ measured again 6 months later. We want to determine if the teacher expectation or age or student may have had an effect on their IQs Grade of Teacher IQ (points) Student Expectation 2nd Normal 100 2nd High 115 9th Normal 110

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Second Grade and Ninth Grade students were given an IQ test, with no special information given
to their teachers. The teachers were then told that some of their students were about to have an
"intellectual growth spurt." The students then had their IQ measured again 6 months later. We
want to determine if the teacher expectation or age or student may have had an effect on their
IQs
Grade of
Teacher
IQ (points)
Student
Expectation
2nd
Normal
100
2nd
High
115
9th
Normal
110
9th
High
110
What is the MAIN EFFECT (in points) of the GRADE of the student on IQ scores? Use the correct
sign (using Oldest - Youngest to do your calculation)
Transcribed Image Text:Second Grade and Ninth Grade students were given an IQ test, with no special information given to their teachers. The teachers were then told that some of their students were about to have an "intellectual growth spurt." The students then had their IQ measured again 6 months later. We want to determine if the teacher expectation or age or student may have had an effect on their IQs Grade of Teacher IQ (points) Student Expectation 2nd Normal 100 2nd High 115 9th Normal 110 9th High 110 What is the MAIN EFFECT (in points) of the GRADE of the student on IQ scores? Use the correct sign (using Oldest - Youngest to do your calculation)
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