HIdden Knowledge

Apparatus for identification and assessment of specific interests and knodge of an individual comprising a display medium, projection screen or television for example, and an image generator, such as a slide projector, for presenting to a testee, for immediate recognition of color only, a series of word-color combinations in rapid order, the projector being adapted to present slides in selected sequence to prevent memory recognition and sequential color repetition, and an elapsed time recording mechanism for recording the testee's response time for recognition of the color presented with the potential interference factor of specific interest and/or knowledge of the word image simultaneously presented.