 Such feelings can come from a variety of different sources that are irrelevant to a judgment.For example, the feeling of effort can be elicited by contextual features such as the demands of the task (trying to come up with a few versus many exemplars), processing fluency (high or low figure-ground contrast, easy- versus difficult-to-read fonts) and motor movements (brow contraction).Effortful feelings produced by these manipulations can influence judgments about truth, frequency, risk, and beauty