Question 12 / 50:  Which is NOT true about IQ scores according to available evidence?
A  IQ scores are holding steady around the world
B  crystallized intelligence shows little decline in normal aging
C  IQ scores, according to twin studies, are about 50% heritable
D  birth-order has an effect on IQ scores
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Introduction to Psychology MCQ Exam 2009#2

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Attribution:  Gabrieli, John. 9.00 Introduction to Psychology, Spring 2009. (MIT OpenCourseWare: Massachusetts Institute of Technology), http://ocw.mit.edu/courses/brain-and-cognitive-sciences/9-00sc-introduction-to-psychology-fall-2011 (Accessed 2 Mar, 2014). License: Creative Commons BY-NC-SA
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