Abstract  Greater intra-subject variability (ISV) in response time is a heritable endophenotype of attention-deficit/hyperactivity disorder
(ADHD). Spontaneous low frequency oscillations (LFO: 0.01–0.1 Hz) observed in brain functional magnetic resonance signals
might account for such behavioral variability. Recently, we demonstrated that ISV in response time (RT) explained ratings
of ADHD symptoms. Building on this finding, here we hypothesized that LFO in RT time series would explain these ratings, both
independently and in addition to RT coefficient of variation (CV). To measure RT LFO, we applied Morlet wavelet transform
to the previously collected RT data. Our community sample consisted of 98 children (including 66 boys, mean age 9.9 ± 1.4 years),
...

More...