PMID- 27412730
OWN - NLM
STAT- MEDLINE
DCOM- 20180123
LR  - 20181202
IS  - 1554-3528 (Electronic)
IS  - 1554-351X (Linking)
VI  - 49
IP  - 3
DP  - 2017 Jun
TI  - Measuring sequences of keystrokes with jsPsych: Reliability of response times and 
      interkeystroke intervals.
PG  - 1163-1176
LID - 10.3758/s13428-016-0776-3 [doi]
AB  - Although the precision and reliability of response time (RT) measurements 
      performed via Web-based interfaces have been evaluated, sequences of keystrokes 
      have never been investigated in detail. Keystrokes often occur in much more rapid 
      succession than RTs, and operating systems may interpret successive or 
      concomitant keyboard events according to both automatic and user-based settings. 
      Sequence keystroke timing could thus be more sensitive than single RTs to noise 
      in online measurements. Here, we quantified the precision and reliability of 
      timing measures performed during sequences of keystrokes. We used the JavaScript 
      jsPsych library to create an experiment involving finger-movement sequences, and 
      ran it online with 633 participants. We manipulated the structure of three 
      keystroke motor sequences, targeting a replication of previous findings regarding 
      both RTs and interkeystroke intervals (IKIs). Our online data accurately 
      reproduced the original results and allowed for a novel assessment of demographic 
      variables such as age and gender. In parallel, we also measured the objective 
      timing accuracy of the jsPsych interface by using specialized hardware and 
      software, showing a constant 60-ms delay for RTs and a 0-ms delay for IKIs across 
      the sequences. The distribution of IKIs revealed quantizing for a majority of 
      participants, most likely due to the sampling frequency of their USB keyboards. 
      Overall, these findings indicate that JsPsych provides good reliability and 
      accuracy in sequence keystroke timings for mental chronometry purposes, through 
      online recordings.
FAU - Pinet, S
AU  - Pinet S
AUID- ORCID: 0000-0002-8532-9950
AD  - Aix Marseille Univ, CNRS, LPC, Marseille, France.
FAU - Zielinski, C
AU  - Zielinski C
AD  - Aix Marseille Univ, CNRS, BLRI, Aix-en-Provence, France.
FAU - Mathot, S
AU  - Mathot S
AD  - Aix Marseille Univ, CNRS, LPC, Marseille, France.
FAU - Dufau, S
AU  - Dufau S
AD  - Aix Marseille Univ, CNRS, LPC, Marseille, France.
FAU - Alario, F-X
AU  - Alario FX
AD  - Aix Marseille Univ, CNRS, LPC, Marseille, France.
FAU - Longcamp, M
AU  - Longcamp M
AD  - Aix Marseille Univ, CNRS, LNC, 3 Place Victor Hugo, 13331, Marseille Cedex 3, 
      France. marieke.longcamp@univ-amu.fr.
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Behav Res Methods
JT  - Behavior research methods
JID - 101244316
SB  - IM
EIN - Behav Res Methods. 2017 Jun;49(3):1177-1178. PMID: 28342069
MH  - Adult
MH  - Aged
MH  - Female
MH  - Fingers/*physiology
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - *Reaction Time
MH  - Reproducibility of Results
MH  - *Software
MH  - Young Adult
OTO - NOTNLM
OT  - Interkeystroke intervals
OT  - Motor sequence
OT  - Online experiment
EDAT- 2016/07/15 06:00
MHDA- 2018/01/24 06:00
CRDT- 2016/07/15 06:00
PHST- 2016/07/15 06:00 [pubmed]
PHST- 2018/01/24 06:00 [medline]
PHST- 2016/07/15 06:00 [entrez]
AID - 10.3758/s13428-016-0776-3 [pii]
AID - 10.3758/s13428-016-0776-3 [doi]
PST - ppublish
SO  - Behav Res Methods. 2017 Jun;49(3):1163-1176. doi: 10.3758/s13428-016-0776-3.