Interest in the relationship between simple physiological measures and intelligence is re-emerging. The inspection time procedure is one of the most widely researched of these simple measures. A major limitation to progress in this area has been the ability of some subjects to use post-making cues to interpret the target stimulus. A dynamic masking paradigm is proposed to overcome the inadequacies of the traditional mask. Inspection times estimated using this dynamic paradigm rather than the traditional procedure correlated more highly with conventional measures of intelligence (-0.82 vs -0.74 and -0.73 vs -0.32) for small samples of special school and university students, respectively, although the differences in the strengths associations were not significant.