Dichotic Listening Paradigm using ALLR:
An Exploratory study
There are many different methods to study brain asymmetry such as Wada test, tachistoscopic test and brain imaging. Dichotic listening is one among them. The concept ‘dichotic’ listening was introduced by Trimble (1931), the classic Dichotic Listening (DL) test was proposed by Broadbent (1954) and later linked to hemisphere-specific functions by Kimura (1961).This test is a simple, behavioural, non-invasive procedure which indicates overall hemispheric dominance effects (Ahonniska, Cantell, Tolvanen, & Lyytinen, 1993; Kimura, 1961) The use of DL has been widely accepted to infer brain asymmetry, since it is sensitive to hemisphere differences to specific sounds (Penna , 2006)..As a tool for brain laterality, DL has been used to study various cortical processing functions including language processing (Tartter 1988), emotional arousal (Brayden 1988), hypnosis and altered state of consciousness (Cox 1978), stroke patients (Hugdahl et al., 1990), psychiatric disorder (Wexler 1986) childhood disorder, including dyslexia (Cohen et al., 1992).
Evoked potentials are electrical signals generated by the nervous system in response to a stimulus. Auditory Evoked Potentials (AEPs) are generated in response to an acoustic stimulus and are measured using electrodes on the surface of the scalp. ERPs have greater temporal resolution (Gaudreault et al., 2013)and hence