The present invention generally relates to systems for generating identifiers. In particular, the systems and methods herein are configured to generate visual and/or aural identifiers for representing user response to stimuli. In a preferred embodiment, visual identifiers are generated from primary colors or shapes, wherein the primary colors and/or shapes can be blended or modified based on strength/weakness of the stimuli experienced by a user or across a plurality of users, while aural identifiers are generated from musical notes from any source such as preprogrammed stored notes or notes played live. Preferred embodiments of the invention are further configured to receive text or other non-visual identifier from a user in order to describe the response the user has to a stimuli; wherein the associated system is configured to convert the described response into an appropriate identifier.