need explanation answer is option c

Ciccarelli: Psychology_5 (5th Edition)
5th Edition
ISBN:9780134477961
Author:Saundra K. Ciccarelli, J. Noland White
Publisher:Saundra K. Ciccarelli, J. Noland White
Chapter1: The Science Of Psychology
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need explanation answer is option c
Two researchers studied the relationship of positive emotions and longevity by
examining smile intensity in photographs of major league players from the past and
comparing it to their age at the time of death. This research method can be regarded
as an example of .
naturalistic observation
case study
archival research
psychobiography
Transcribed Image Text:Two researchers studied the relationship of positive emotions and longevity by examining smile intensity in photographs of major league players from the past and comparing it to their age at the time of death. This research method can be regarded as an example of . naturalistic observation case study archival research psychobiography
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