PCA	Principal Component Analysis
RSI	Resilience to Stress Index
p	p-value of statistical test
RESI-M	Resilience in Mexicans scale
CD-RISC	Connor-Davidson Resilience Scale
RSA	Resilience Scale for Adults
PT	Peripheral Temperature
EMG	Electromyography
BR	Breathing Rate
SC	Skin Conductance
BVP	Blood Volume Pulse
uS	mirco Siemens
°C	Centigrades
uV	micro Volts
fs	sampling frequency for median filter
w	kernel size of the median filter
length(v)	total number of instances for the median filter
z	standardized feature
x	instance to standardize
a	mean of the feature to standardize
s	standard deviation of a set of observations
instance(t)	instance in a determined point in time
$phas{e}_i$	where i represents the set of phases of the Psychophysiological Stress Test