1. A computing system, comprising: one or more processors; memory; and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors to treat a subject in need of treatment of a psychiatric disorder, the one or more programs including instructions for: conducting a therapy session, the therapy session comprising: i) sequentially displaying each respective expression image in a plurality of expression images for a predetermined amount of time, the plurality of expression images comprising a plurality of subsets of expression images, wherein each expression image in the plurality of expression images is (a) independently associated with a respective expression in a set of expressions, (b) engineered to display or exhibits a predetermined intensity of the respective expression on an intensity scale that ranges from low intensity to high intensity of the respective expression and (c) configured to induce human amygdala activation, ii) responsive to completion of each respective expression image subset within the plurality of expression images, receiving a response from the subject to a query as to whether the first and the last expression image in the respective expression image subset exhibits the same emotion, and wherein each respective expression image subset within the plurality of expression images consists of N expression images, wherein N is a predetermined integer, iii) determining a score for each respective expression image subset within the plurality of expression images based at least in part upon the response to the query for the respective expression image subset, and iv) resetting the value of N to a new positive integer value based at least in part on the plurality of scores, wherein the predetermined intensity of the respective expression on the intensity scale of respective images of a first subset of expression images in the plurality of expression images is greater than or less than the predetermined intensity of the respective expression on the intensity scale of respective images in the plurality of expression images of a second subset of expression images in the therapy session, wherein the second subset is displayed after the first subset.