Erich just uploaded a short post noting that Americans feel sourly about nearly everything. With no sign of optimism, and marked lack of trust in virtually all institutions, does it come as a surprise that people often sigh hopelessly over the “good old days”? Many people cling to an image of past glory and happiness, even when their fantasy “good old days” never existed. Several writers on the blog, Jason Rayl and me among them, have pointed out the inaccuracies of such perfect, imagined pasts.

So when we look back to a “good old day”, hold it up to the light of present times and see a glaring gap, has the world changed, or have our perceptions simply matured, become more jaded with time?

Some psychological research has delved into this tendency of human cognition to misperceive the past, and of our additional tendency to ignore the role that perception plays in how the world looks. A recent Cornell University study entitled “When Change in Self is Mistaken for Change in the World” (Eibach, Libby & Gilovich, 2003) finds that:

“Personal changes in respondents (e.g., parenthood, financial change) were positively correlated with their assessments of various social changes (e.g., crime rates, freedom).”

Thus, if your world has improved in recent years, you may think that crime rates have lowered, drug abuse and dependency has shrunk, and that the country’s economy has brightened and bettered recently as well. But if things have gotten worse for you, perhaps you clamor …