Abstract: A method for determining reproducibly if visual features of an object are known to a person. For that purpose, one or more test images are prepared by applying predetermined algorithms so that an image of the respective object is altered such that cognitive perception is in general impossible whereas the global affective impression is not influenced. The test images are presented to a person and it is determined if recognition occurs and if so how certain and how correct. Finally, it is determined which parts of the original images can be reproduced based on information recalled from the memory and if there is confusion or interchange with other images.

Abstract: A system for testing audiovisual stimuli, such as television series, commercials, etc. from a complex of interactions between stimuli, consumers and environmental factors includes: one or more sources of audiovisual stimuli; a part connected to the sources for presenting the stimuli to respondents; a switching part to be operated by the respondents for issuing commands such as a command to end the presentation of a stimulus; a part for registering the moments at which the switching parts are operated; a generator for generating further stimuli, such as textual information including questions, messages, commands and instructions; a part to be operated by the respondents for providing responses to the further stimuli such as providing answers to questions and providing reasons, such as reasons for ending the presentation of stimuli; and a part for registering the responses provided by the respondents.