Gray ‘s theory explained the neurobiological bases of individual differences in personality traits, through an important modification of Eysenck’s personality dimension framework, and through the introduction of three behavioural defence systems (BAS, BIS, FFFS); so that the relative sensitivity of either behavioural defence system to reward or punishment will reflect the type of emotional and cognitive process that dominates the personality. It is for this reason that J. Gray looked at BAS as representing impulsiveness (rather than simple extraversion) and BIS as representing anxiety (rather than pure neuroticism), and therefore, as having the tendency of being exposed to behavioural disorders, conduct disorders and psychopathy in case of BAS oversensitivity, and to anxiety disorders, obsessions and personality disorders in case of BIS oversensitivity. The new field of Neuroquantology confirmed that human conscious experience is four-dimensional and has neurobiological bases, thus allowing for Einstein’s law of relativity to be applied to it (Sieb, 2016), firstly, because of the multiplicity of the clocking systems that govern the perception of time (Buhusi and Meck, 2009), and secondly, because of the brain cognitive processing speed which often reaches the speed of light (Ghaderi, 2015); so, individual psychological time may slow down or accelerate depending on a set of factors relating to personality traits, and therefore the perception of time, either psychological, biological or physical, may vary depending on the nature of the dominating behavioural defence system. We suggest, here, the introduction of a spatio-temporal framework with two dimension/ axis, within Eysenck’s and Gray’s personality dimension frameworks, that accounts for the past/future psychological space-time dimension, and that explains BAS and BIS systems sensitivity to reinforcement across the cognitive space-time continuum of episodic memory, and not only across the two great dimensions of fear/anxiety and defensive distance of the McNaughton & Corr model of 2004.