Neuroimaging as a means for validating whether a stimulus such as advertisement, communication, or product evokes a certain mental response such as emotion, preference, or memory, or to predict the consequences of the stimulus on later behavior such as consumption or purchasing. Subjects are exposed to stimuli of varying types. Their brain responses are then measured by any one or a combination of neuroimaging devices. The results of neuroimaging are then used to predict future behavior of the subject and those similarly situated with respect to purchase or consumption of products, based upon the non-subjective evidence of neuroimaging.