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. 2018 Feb 28;6(1):9. doi: 10.3390/jintelligence6010009

Table 2.

Descriptive statistics and correlations between age, SRPM performances, RTs and the modulation index.

Mean (SD) Modul. Perf. Log.RT Log.RT-e Log.RT-i Log.RT-d
Age (months) 111.8 (13.71) 0.31 ** 0.45 ** −0.07 −0.22 ** −0.14 0.12
Modulation 0.52 (0.24) 0.63 ** 0.15 * −0.27 ** −0.03 0.56 **
SRPM perf. 0.6 (0.15) 0.63 ** 0.24 ** −0.1 0.07 0.53 **

Note: SRPM perf.: individual success rate; Log.RT-e (-i, -d): individual mean Log.RT for easy (-e), intermediate (-i), or difficult (-d) items. * p < 0.05. ** p < 0.01.