Inhibitory control refers to the ability to suppress the processing of irrelevant yet dominant stimuli or responses (Nigg, 2000).
Inhibitory control, along with flexible switching, has been identified as one of the first executive function skills to emerge, developing quickly during the pre-school years (Diamond and Doar, 1989; Diamond et al., 2002). Inhibitory control skills help children suppress inappropriate behaviours and thoughts that may distract them from instruction (Alexander et al., 1993; Blair, 2002; Sa?ez et al. 2012). Further, these skills are essential for cognition, educational attainment and social functioning (Blair, 2002; Espy et al., 2004). Measured prior to kindergarten, inhibitory control predicts mathematics skills in kindergarten; when measured in kindergarten, it predicts mathematics and early literacy skills in primary school (Blair and Razza, 2007).