10.1371/journal.pone.0000443.g003 Alexander Maye Alexander Maye Chih-hao Hsieh Chih-hao Hsieh George Sugihara George Sugihara Björn Brembs Björn Brembs Spontaneous behavior is not simply random. Public Library of Science 2007 computational biology/computational neuroscience computer science/numerical analysis and theoretical computing ecology/behavioral ecology evolutionary biology/animal behavior mathematics/nonlinear dynamics neuroscience/behavioral neuroscience neuroscience/motor systems physiology/integrative physiology physiology/motor systems mental health/psychology 2007-05-16 00:01:47 Figure https://plos.figshare.com/articles/figure/_Spontaneous_behavior_is_not_simply_random_/620107 <p>A–GRIP analysis of ISIs. Plotted are the mean standard deviations from the theoretically expected random value for fly ISI series and the random series generated by a Poisson process. The fly deviations are all significantly larger than the values for the computer-generated series. B–Log-log plots of ISIs. The Lévy exponent μ is calculated from the inclination of the linear fit. A Lévy distribution is defined as 1<μ<3. Smaller values indicate a larger proportion of long ISIs. A Cox Process (<i>cox</i>) reveals a similar power-law structure as the flies. Error bars are S.E.M.s throughout. See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0000443#s4" target="_blank"><i>Methods</i></a> for details and statistics.</p>