It is tempting to file them as a separate type, blessed with a social gene the rest of us lack. Two findings, in particular, are worth knowing before the next time you talk yourself out of saying hello. They underestimated how much the other person had enjoyed their company and wanted to talk again. The people told to talk to a stranger reported a more positive commute than those who sat alone. The reticent, by starting fewer conversations, never gather the data that would correct the forecast, so the fear stays intact.