 Even within the category of experiments, we find a lot of diversity with respect to inputs, methods of measurement, and outputs. The experiment just described uses a behavioral measure and manipulation—finding the dime is the input, helping is the outcome measured. Other experiments measure not behavior but judgment or intuition, and this can be done using a survey or other form of self–report or informant–report where subjects respond explicitly to some question, situation, or dilemma. Studies measuring judgments might use either manipulations of the condition in which the subject makes the judgment, or they might look for correlations between judgments and some other factor, such as brain activity, emotional response, reaction time, visual attention, and so on (Strohminger et al. 2014).