Dr. winkle conducts basic research on the systematic changes in intelligence associated with aging. it is most likely that dr. winkle is a(n) psychologist.

Dr. Winkle is most likely a developmental psychologist.

Explanation:

Developmental psychology is a field that studies the various changes that occur in the humans during their life. It involves examining the changes in human beings of all age groups. It studies the cognitive, socioemotional and physical development of the human beings which include personality, identity information, language, motor skills, moral understanding, emotional development, etc.  

Therefore, Dr. Winkle is most likely a developmental psychologist.

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