Deviations from physical randomness due to human agent intention?

Advanced techniques for pattern detection and time series reconstruction ar e applied to look for deviations from randomness in random time series gene rated under different conditions. Based on a detailed error analysis, evide nce for significant non-random contributions is found under conditions in w hich human agents are asked to carry out intentional tasks effectively corr esponding to deviations from randomness in the output of a random physical device. There are strong indications that the observed non-random deviation s are related to enhanced temporal correlations. (C) 1999 Elsevier Science Ltd. All rights reserved.