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Table 7 Distributional characteristics of the predictor and outcome variables across 201 participants

From: Interference scores have inadequate concurrent and convergent validity: Should we stop using the flanker, Simon, and spatial Stroop tasks?

Variable Min Max Mean (SD) Skew (SE) Kurtosis (SE)
Raven’s scores 2 12 8.4 (2.3) −.56 (.17) −.21 (.34)
Teams sports ability 1 5 2.7 (1.1) +.01 (.17) −.75 (.34)
Frequency of physical exercise 1 5 3.2 (1.0) −.11 (.17) −.41 (.34)
Years of musical training 0 32 2.7 (4.3) 3.1 (.17) 13.9 (.34)
Frequency of playing an instrument 1 5 1.8 (1.0) 1.3 (.17) 1.37 (.34)
Frequency of playing video games 1 5 2.2 (1.1) .78 (.17) .03 (.34)
Frequency of meditation or mindfulness 1 5 2.4 (1.0) +.43 (.17) −.42 (.34)
L2/L1 ratio 0 1 .53 (.37) −.34 (.17) −1.38 (.34)
SES (parents’ education & family income) 1.3 7.3 4.4 (1.3) −.05 (.17) −.63 (.34)
(Lack of) Premeditation 1.8 4.0 3.1 (0.4) −.18 (.17) +.09 (.34)
Urgency 1.2 3.9 2.3 (0.5) +.11 (.17) +.17 (.34)
(Lack of) Perseverance 2.1 3.9 2.9 (0.3) −.00 (.17) −.08 (.34)
Self-Control (BSCS) 1.8 4.8 3.3 (0.6) +.03 (.17) −.17 (.34)
Z Composite RT across four tasks −1.3 2.5 0 (.65) .84 (.17) 1.03 (.34)