Harker and Keltner (2001)examined Women's Yearbook Photos from 30 Years

Multiple Choice

Harker and Keltner (2001) examined women's yearbook photos from 30 years ago.They examined how women's facial expressions in the photos predicted whether or not the women were more or less likely to marry and how happy they were if they stayed married.What kind of research is this an example of?

A) archival
B) experimental
C) longitudinal
D) observational