. (2015). Handedness and behavioural inhibition system/behavioural activation system (BIS/BAS) scores: A replication and extension of Wright, Hardie, and Wilson (2009). Laterality, 20(5), pp. 585-603. doi: 10.1080Laterality, 20(5), pp. 585-603. doi: 10. /1357650X.2015 This is the accepted version of the paper.This version of the publication may differ from the final published version. Handedness has been of interest to neuropsychologists for over a century, largely because of its association with asymmetry of hemispheric function (Beaton, 2003; Ocklenburg, Best, Arning, Peterburs & Güntürkün, 2014). In many, probably most, cognitive and behavioural studies lefthanders are excluded with the intention of minimising heterogeneity with respect to the cerebral representation of function or behaviour. Recently, however, a strong plea has been made to include left-handers in these studies as they "represent a substantial portion of the human population and therefore left-handedness falls within the normal range of human diversity" (Willems, Van der Haegen, Fisher & Francks, 2014). If this plea is heeded, then in studies involving left-handers it will be necessary to understand how, if at all, they differ from right-handers (see also Hancock & Bever, 2013).
Permanent repository linkPutative cognitive differences between left-and right-handers have long been of interest (see Beaton, 1985;Willems et al., 2014) but differences related to other aspects of behaviour, such as alcohol consumption (Bakan, 1973;London, 1987;1990 but see Denny, 2011, smoking (Harburg, Feldstein & Papsdorf, 1978), sleep duration (Hicks, Pellegrini & Hawkins, 1979) and dream frequency (Schredl, Beaton, Henley-Einion & Blagrove, 2013;2014) have also been reported. Coren (1994) considered that left-and right-handers differ in temperament and personality. One aspect of personality/behaviour that has received considerable attention is anxiety.On the basis of a questionnaire administered to a group of 14-17 year old girls attending a classifying centre at what was then called an "approved" school (i.e. for adolescents with emotional and behavioural difficulties), Orme (1970) found that a greater proportion of 23 left-handers (defined by writing hand) showed high levels of emotional instability as compared with 277 right-handers. This study was criticised by Hicks & Pellegrini (1978) Dillon (1989) reported a significant correlation among 34 male but not 44 female college students between scores on a questionnaire assessing students' worries and scores on a General Laterality Scale. Using the Edinburgh Handedness Inventory (EHI), Merkelbach, de Ruiter and Olff (1989) compared the handedness of 77 anxiety disorder patients with handedness in a healthy control 6 group and found no evidence of a relationship between left-handedness and clinically diagnosed anxiety.In a recent study Lyle, Chapman and Hatton (2013) Previously they had found (Wright, Hardie & Wilson, 2009) that left-handers reported themselves to have higher BIS scores than right-hande...