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.

Abstract: Method and device for collecting and processing stimuli data and measuring the reactions to them, in which the physiological reactions of respondents to the stimuli presented, or components thereof, are measured automatically and are recorded in one or more computer systems. Recorded data, stimuli data, whether or not in combination with respondent data, are automatically processed, e.g. in central units, to interpretable results which, stored in a database, a relational database for example, are accessible to anyone under certain conditions.

Abstract: Method and device for identification of stimuli, in which one or various identification methods in combination can be applied. Here, stimuli in their original manifestation, as well as stimuli positions and orientations are determined and it is ascertained which stimuli respondents have in their field of vision, from which moment, for how long and under which circumstances, as well as the way in which they handle and manipulate them.

Abstract: In order to measure the visual attention of persons or animals to a visible object, a beam (9) is radiated to an area of observation (1) including the persons or animals under test. A measuring arrangement in close vicinity to the object comprises a radiation source (1) emitting, e.g. an invisible parallel beam (9), a scanning member (3), guiding said radiation beam (9) across the area of observation (1) and detector means (6, 7) receiving the radiation scattered from the area of observation (1). Radiation from the retina and/or cornea of said persons or animals is selectively detected and transformed into an evaluation signal.