…hen asked specifically the lonely group could in fact deliberately mimic smiles, as well as frowns. They also found that the lonely group smiled automatically while viewing non-social positive images that did not include people (such as nature scenes) that also made the other group smile.
Tara Well, PhD
Couldn’t it also indicate that in general people, especially American people are nasty bullies who ostracize others to make themselves feel better. Hence “happy” pics without people are positive, while years of negative social interaction have led to a desire to avoid people cuz not likely a positive experience