1. MOL1.1. Cause for code-switch

1.1.1.Bilinguals are commonly asked what language they like to think in whether the thoughts they think differ according to which language they are thinking in. I suspect that these questions hold fascination because they hint at a duality within the individual: two different patterns of thought in the confines of one head. This possibility is interesting for much the same reason that split-brain patients and multiple personalities seize the popular imagination.

1.2. Levels of investigation1.2.1.Neurological level-physiology of the brain and asks whether the language are differentially

localized in the brain.1.2.2.Information processing – addresses the question through psychological experiments in

which mental processes are measured1.2.3.Educational psychology – looks at groups of students who are being educated bilingually

and seeks to ascertain whether they demonstrate learning that is common to both languages