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Home Q & A Board Science-Related Homework Help Psychology Developmental Psychology
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Kellman Kellman
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9 years ago
Sleep researchers have established that people vary in their morningness and eveningness. These preferences change with age due to ____.
a.   testosterone levels
b.   growth hormone levels
c.   neurotransmitter levels
d.   estrogen levels
Textbook 
Child Development: A Cultural Approach

Child Development: A Cultural Approach


Edition: 1st
Authors:
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randis_oddyrandis_oddy
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Kellman Author
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#2
9 years ago
Marking this thread solved Slight Smile Thanks!
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