13. A non-transitory computer-readable storage medium having stored thereon executable instructions that, when executed by one or more processors of a computer system, cause the computer system to at least: transmit a challenge-response problem, the challenge-response problem being a security check to determine if a requestor is an automated-agent or a human-user, wherein the security check to cause a challenge presented by the security check to be humanly perceivable in a user interface, the challenge being based at least in part on psycholinguistics, evolutionary psychology, color psychology, or a combination thereof; receive data indicating a response to the challenge-response problem, the data indicating a correct response to the challenge-response problem; determine that the correct response to the challenge-response problem identifies the requestor as an automated-agent; and perform one or more operations as a result of the response to the challenge-response problem that identifies the requestor as an automated-agent.
13. A non-transitory computer-readable storage medium having stored thereon executable instructions that, when executed by one or more processors of a computer system, cause the computer system to at least: transmit a challenge-response problem, the challenge-response problem being a security check to determine if a requestor is an automated-agent or a human-user, wherein the security check to cause a challenge presented by the security check to be humanly perceivable in a user interface, the challenge being based at least in part on psycholinguistics, evolutionary psychology, color psychology, or a combination thereof; receive data indicating a response to the challenge-response problem, the data indicating a correct response to the challenge-response problem; determine that the correct response to the challenge-response problem identifies the requestor as an automated-agent; and perform one or more operations as a result of the response to the challenge-response problem that identifies the requestor as an automated-agent. 19. The non-transitory computer-readable storage medium of claim 13 , wherein the instructions further comprise instructions that, when executed by the one or more processors, cause the computer system to: monitor a type of product, service, or both, searched for by the user; determine a mood of the user; and provide the challenge-response problem that matches the mood of the user, is complementary to the mood of the user, or is made to change the mood of the user.