PMID- 27085840 OWN - NLM STAT- MEDLINE DCOM- 20161222 LR - 20181202 IS - 1873-6297 (Electronic) IS - 0001-6918 (Linking) VI - 167 DP - 2016 Jun TI - Two thumbs and one index: A comparison of manual coordination in touch-typing and mobile-typing. PG - 16-23 LID - S0001-6918(16)30051-8 [pii] LID - 10.1016/j.actpsy.2016.03.007 [doi] AB - It has been extensively demonstrated that in touch-typing, manual alternation is performed faster than manual repetition (see i.e. Rumelhart & Norman, 1982), due to parallel activation of successive keystrokes. In this experiment, we tested whether the manual coordination patterns typical of touch-typing can be observed in mobile-typing. We recruited skilled touch-typists and divided them into two groups depending on their typing habits on the mobile device. The "one-hand" group typed with one index finger on the mobile, and therefore produced words exclusively through manual repetition. The "two-hands" group used two thumbs, and therefore produced words through a combination of mobile-typing repetitions and alternations. The two groups were tested in a typing to dictation task with both a standard keyboard and a mobile keyboard. Results showed that manual alternation and manual repetition patterns are similar in touch-typing and in mobile-typing. For the "two-hands" group, the mean interkeystroke intervals (IKIs) for touch-typing decreased as manual alterations in words increased in both touch- and mobile-typing. The "one-hand" group showed an opposite pattern in mobile-typing. Bigram frequency was correlated with IKIs per bigrams in both tasks and groups, but the correlation for the "one-hand" group in mobile-typing was different. Our results suggest that manual coordination processes are the same in touch-typing and in mobile-typing despite different effectors, provided that both hands are used to type. CI - Copyright (c) 2016 Elsevier B.V. All rights reserved. FAU - Cerni, Tania AU - Cerni T AD - Department of Psychology and Cognitive Science, University of Trento, Corso Bettini, 31, 38068 Rovereto, Italy. Electronic address: tania.cerni@gmail.com. FAU - Longcamp, Marieke AU - Longcamp M AD - Laboratoire de Neurosciences Cognitives, UMR 7291 CNRS, CNRS - Aix-Marseille Universite - Federation de recherche 3 C, Brain and Language Research Institute, FR 3512 Centre Saint-Charles, Case C, 3 place Victor Hugo, 13331 Marseille Cedex 3, France. Electronic address: marieke.longcamp@univ-amu.fr. FAU - Job, Remo AU - Job R AD - Department of Psychology and Cognitive Science, University of Trento, Corso Bettini, 31, 38068 Rovereto, Italy. Electronic address: remo.job@unitn.it. LA - eng PT - Comparative Study PT - Journal Article DEP - 20160414 PL - Netherlands TA - Acta Psychol (Amst) JT - Acta psychologica JID - 0370366 SB - IM EIN - Acta Psychol (Amst). 2020 Apr;205:103045. PMID: 32151336 MH - Adult MH - Biomechanical Phenomena MH - Equipment Design MH - Female MH - Fingers/*physiology MH - Hand/physiology MH - Humans MH - Male MH - Middle Aged MH - *Task Performance and Analysis MH - Text Messaging/*instrumentation MH - Thumb/*physiology MH - *Touch OTO - NOTNLM OT - Bimanual coordination OT - Mobile-typing OT - Peripheral processes OT - Touch-typing EDAT- 2016/04/18 06:00 MHDA- 2016/12/23 06:00 CRDT- 2016/04/18 06:00 PHST- 2015/01/14 00:00 [received] PHST- 2016/03/16 00:00 [revised] PHST- 2016/03/19 00:00 [accepted] PHST- 2016/04/18 06:00 [entrez] PHST- 2016/04/18 06:00 [pubmed] PHST- 2016/12/23 06:00 [medline] AID - S0001-6918(16)30051-8 [pii] AID - 10.1016/j.actpsy.2016.03.007 [doi] PST - ppublish SO - Acta Psychol (Amst). 2016 Jun;167:16-23. doi: 10.1016/j.actpsy.2016.03.007. Epub 2016 Apr 14.