was he also a psychologist ?
Yes, he was known to be a well rounded psychologist.
Nicole Oresme
Oresme was known to be a well rounded psychologist. 
what area of science did the muslim world excel in Astronomy, mathematics, and medicine what is it about? UNANSWERABLE when was this practiced? Islamic Golden Age what is the first above mentioned area of science? Astronomy is a natural science that studies celestial objects and phenomena. where did its name come from ? Greek what is the difference between the terms used for it? Based on strict dictionary definitions, "astronomy" refers to "the study of objects and matter outside the Earth's atmosphere and of their physical and chemical properties," while "astrophysics" refers to the branch of astronomy dealing with "the behavior, physical properties, and dynamic processes of celestial objects and phenomena". did any one contribute to it in medieval times? Yes, Richard of Wallingford, Nicole Oresme, and Jean Buridan among others. who was the second above mentioned person? He was a significant philosopher of the later Middle Ages. when was he born? He was born c. 1320–1325. where was he from? From the village of Allemagnes (today's Fleury-sur-Orne) in the vicinity of Caen, Normandy, in the diocese of Bayeux. what did he study? He studied arts and theology in Paris. what as his detailed analysis and assessment on astrology? Oresme's critique of astrology in his "Livre de divinacions" treats it as having six parts.
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Nicole Oresme [SEP] Psychology
Oresme was known to be a well rounded psychologist. He practiced the technique of “inner senses” and studied the perception of the world. Oresme contributed to 19th and 20th century psychology in the fields of cognitive psychology, perception psychology, psychology of consciousness, and psychophysics. Oresme discovered the psychology of unconscious and came up with the theory of unconscious conclusion of perception. He developed many ideas beyond quality, quantity, categories and terms which were labeled “theory of cognition”.