The Hayling Sentence Completion Task & Brixton Spatial Anticipation Task I took special permission from Pearson Assessment Group UK, in order to translate and standardize two of the most well-known and used tests for the assessment of executive function. The Hayling Sentence Completion Test and the Brixton Spatial Anticipation task originally created by Burgess and Shallice, 1997 are two very useful tools that will further facilitate the neuropsychological assessment in the Greek population. The aim of this project is to create normative data for the Greek population. The rationale behind the selection of those two tests is that at the moment the neuropsychological tools that can be used for assessment are very limited and especially those who are sensitive in executive function deficits. I have been using both tests in various populations (healthy controls and psychiatric patients) collecting valuable data for cognitive rehabilitation purposes, research topics and differential diagnoses. Brief description of the Hayling Sentence Completion Task The Hayling Sentence Completion task (Burgess and Shallice, 1997) consists of two sections that are both administered at the same time. The examiner reads out 15 short sentences each of which has the last word missing and the subject is required to make a verbal response as quickly as possible. In the first section (response initiation) the sentence must be completed with a single word that is contextually predicted (e.g. He posted the letter without a … STAMP). In the second section the examiner again reads out 15 short sentences and t he subject has to find a word to complete it but this time the word given has to be totally unconnected (response inhibition), (e.g. He posted a letter without a … BANANA). Errors occur when participants fail to suppress the predicted word (Category A errors) or supply a semantically connected word (Category B errors). In both sections performance is dependent on the Prefrontal cortex. In terms of response initiation, brain regions that have been found to be involved and activated during the task include the left inferior frontal gyrus whereas response inhibition processes led to increases in a network of left prefrontal areas, including the middle and inferior frontal areas (Nathaniel- James, Fletcher and Firth, 1997). Brief description of the Brixton Spatial Anticipation Task The Brixton Spatial Anticipation test is a visuospatial sequencing task with rule changes. This test measures the ability to detect rules in sequences of stimuli and cognitive set shifting. It usually takes between five and ten minutes to administer, and yields an easily understood scaled score of between 1 and 10. The Brixton Spatial Anticipation Test is a relatively new measure for assessing the ability to detect and follow a rule, an important aspect of executive functioning. Cognitive set shifting involves frontostriatal circuits (Berman et al 1995, Marie et al 1999). Evidence from fMRI studies suggests that the Prefrontal cortex is involved in the set shifting aspect of the Wisconsin Card Sorting Test (Berman et al., 1995; Goldberg et al., 1998; Konishi et al., 1998, 1999a; Nagahama et al., 1996; 2001; Rogers et al., 2000). At the moment there was no literature evidence on the exact neural circuits involved in the Brixton test. It is thought however that the activation is similar to this found in the WCST is a task depending on the interaction between the Dorsal prefrontal cortex for rule attainment (Broadmann areas (BA) 9/46) and the Ventral prefrontal cortex (BA 47/12) for cognitive set shifting (Frangou et al., 2006; Monchi et al., 2001; Nagahama et al., 2005). The translation of the Hayling Sentence Completion Task in Greek The authors (Burgess and Shallice, 1997) used sentences that originated from Bloom and Fischler, (1980). Due to the differences in the Greek compared to the English language all sentences were changed in order