simultaneous and three successive tasks. The results revealed two significantly distinguishable coherence patterns corresponding to simultaneous and successive processing. The linking of PASS processes to brain becomes helpful. For example, in understanding the loss of sequential and planning functions due to aging in a study of individuals with Down syndrome. In this study, using single positron emission topography, Das found that aging individuals with Down syndrome show a bilateral decreased cerebral blood flow in the temporal-parietal region of the brain. The significance of cognitive profiling studies both in impaired and intact brains awaits further discussion in the broader context of the biology of intelligence. Remediation and cognitive enhancement One unusual property of the P.A.S.S. theory of cognitive processes is that it has proven useful for both intellectual assessment (e.g. the CAS) and educational intervention. The theory provides the theoretical framework for the PASS Reading Enhancement Program, a remediation curriculum designed to improve the planning, attention and information processing strategies that underlie reading. A related school-readiness program aims at improving the foundations of cognitive processes in preparation for schooling (Das, 2009). Both are evidence-based intervention programs. Challenges A frequently cited criticism is, are Attention and Planning two distinct factors? Kranzler, Keith & Flanagan (2000) found only a marginal fit for the four-factor model; the attention and planning factors were indistinguishable. Recent research on intelligence tests confirm that the most valid score on, for example, the Wechsler Intelligence Scale for Children – Fifth Edition (Canivez, Watkins, & Dombrowski, 2017), Stanford-Binet Fifth Edition (Canivez, 2008), Differential Abilities Scales (Canivez & McGill, 2016), and the Woodcock-Johnson Fourth Edition (Dombrowski, McGill & Canivez, 2017) is the total score that estimates g. That is, the scores which represent the factor based scales these tests provide do not have enough specific variance to be considered interpretable. In fact, a recent reanalysis of Carroll's survey of factor-analytic studies by Benson, Beaujean, McGill, and Dombrowski (2018) concluded that nearly all of the specified abilities presented by Carroll "have little-to-no interpretive relevance above and beyond that of general intelligence (p. 1028)." The only exception to these finding is research reported by Canivez (2011) regarding the Cognitive Assessment System (Naglieri & Das, 1997). References Further reading Alabau-Bofill J. (2003) Estudi dels processos emocionals en nens/nes amb dificultats d'aprenentatge i la seva relació amb els processos cognitius basats en la teoria PASS de la inteligel.lència [tesi doctoral]. UdG Girona. Das, J. P.,