Across all dances, mean waggle run duration was positively correlated with the standard deviation of duration within a dance and mean waggle run duration was negatively correlated with the angle standard deviation (Duration: Spearman's Rank Correlation, ρ = 0.58, p<0.001; Angle: Spearman's Rank Correlation, ρ = −0.36, p<0.001; Fig. 3).
According to Jean Piaget, estimates based on more or less explicit comparison with standard units of duration imply concrete cognitive operations that are developed only after about the age of seven or eight.
In another study by Nedelmann et al. [9] the cut-off value for insufficient valves was set to 0.88 sec according to a three time standard deviation of duration of backward flow in competent valves.
Thus, the starting times vary a lot for each category of programmes, and for all types of programmes taken together the standard deviation of duration until treatment is 15 months; see Table 1 (which is discussed in detail in the next section).
Data about the mean and standard deviation of duration of mechanical ventilation were provided in two studies [ 12, 17].
Standard deviations of duration of tinnitus modification following the masker stimuli were highly variable for both residual inhibition and residual excitation groups (0.00 1.63), and were not dependent on masker or pure-tone audiogram characteristics.
The frequency and amplitude of slow waves (FSW and ASW), standard deviation of duration of slow wave (SDDSW), the percent of spike activity (SA), amplitude of spike activity (ASA) were calculated, stored in special file and statistically analysed (t-test, elementary statistic and histogram methods were used).
Our data provide no information on the best standard for duration of treatment or dose.
In terms of compliance with recommended standards for duration of therapy, patients in the IDC group were more likely to meet these standards compared with patients in the non-IDC group, both for complicated SAB (42.1% vs 13.3%, p=0.13) and uncomplicated SAB (68.4% vs 46.7%, p=0.14).
