> For each timeline interaction, we counted the proportion of words expressing positive emotions (like "love", "nice", "happy", etc.) minus the proportion of words expressing negative ones (like "hate", "hurt", "bad", etc.).<p>I've always been suspicious of this type of measurement. It seems like statuses such as "I LOVE shoveling snow SO MUCH but I will be happy when winter is over!", where positive language is used to convey negative emotions through irony and contrast, would completely destroy such ratings. Maybe there are AIs that understand irony?