Organization and lateralization of reaching in infants: an extension of Bresson et al.
This study tested whether the development of one-handed and collaborative two-handed reaching for an object on a support found by Bresson et al. (Neuropsychologia 15, 311-320, 1977) was related to the fluctuation in hand preference for manipulation and/or banging following duplicated syllable babbling onset found by Ramsay (Devl Psychol. 20, 64-71, 1984). Ramsay found that a preference for object manipulation and/or banging with the right hand emerged on the week of babbling onset, temporarily disappeared 3-4 weeks later and then re-emerged on the subsequent (fifth) week. In the present study, a preference for one-handed reaching with the right hand for objects on a support was present only on the fifth week after babbling onset. No evidence was found for a hand preference in collaborative two-handed reaching.