2016 |
Garaizar, Pablo; Cubillas, C P; Matute, Helena A HTML5 open source tool to conduct studies based on Libet’s clock paradigm Journal Article Scientific Reports, 2016. Abstract | Links | BibTeX | Tags: HTML5, open source @article{Garaizar2016b, title = {A HTML5 open source tool to conduct studies based on Libet’s clock paradigm}, author = {Pablo Garaizar and C.P. Cubillas and Helena Matute}, url = {https://home/learninglabdeust/public_html.researchgate.net/profile/Pablo_Garaizar/publication/308088303_A_HTML5_open_source_tool_to_conduct_studies_based_on_Libet%27s_clock_paradigm/links/57e0dd6f08ae3f2d793ebd18/A-HTML5-open-source-tool-to-conduct-studies-based-on-Libets-clock-paradigm.pdf?origin=publication_detail}, doi = {10.1038/srep32689}, year = {2016}, date = {2016-09-20}, journal = {Scientific Reports}, abstract = {Libet’s clock is a well-known procedure in experiments in psychology and neuroscience. Examples of its use include experiments exploring the subjective sense of agency, action-effect binding, and subjective timing of conscious decisions and perceptions. However, the technical details of the apparatus used to conduct these types of experiments are complex, and are rarely explained in sufficient detail as to guarantee an exact replication of the procedure. With this in mind, we developed Labclock Web, a web tool designed to conduct online and offline experiments using Libet’s clock. After describing its technical features, we explain how to configure specific experiments using this tool. Its degree of accuracy and precision in the presentation of stimuli has been technically validated, including the use of two cognitive experiments conducted with voluntary participants who performed the experiment both in our laboratory and via the Internet. Labclock Web is distributed without charge under a free software license (GPLv3) since one of our main objectives is to facilitate the replication of experiments and hence the advancement of knowledge in this area. }, keywords = {HTML5, open source}, pubstate = {published}, tppubtype = {article} } Libet’s clock is a well-known procedure in experiments in psychology and neuroscience. Examples of its use include experiments exploring the subjective sense of agency, action-effect binding, and subjective timing of conscious decisions and perceptions. However, the technical details of the apparatus used to conduct these types of experiments are complex, and are rarely explained in sufficient detail as to guarantee an exact replication of the procedure. With this in mind, we developed Labclock Web, a web tool designed to conduct online and offline experiments using Libet’s clock. After describing its technical features, we explain how to configure specific experiments using this tool. Its degree of accuracy and precision in the presentation of stimuli has been technically validated, including the use of two cognitive experiments conducted with voluntary participants who performed the experiment both in our laboratory and via the Internet. Labclock Web is distributed without charge under a free software license (GPLv3) since one of our main objectives is to facilitate the replication of experiments and hence the advancement of knowledge in this area. |
2014 |
Garaizar, Pablo; Reips, Ulf Visual DMDX: A web-based authoring tool for DMDX, a Windows display program with millisecond accuracy Journal Article Behavior Research Methods, 47 (3), pp. 620-631, 2014, ISSN: 1554-3528. Abstract | Links | BibTeX | Tags: DMDX, HTML5, Internet-based research, JSON @article{Garaizar2014b, title = {Visual DMDX: A web-based authoring tool for DMDX, a Windows display program with millisecond accuracy}, author = {Pablo Garaizar and Ulf Reips }, url = {https://link.springer.com/article/10.3758%2Fs13428-014-0493-8}, doi = {10.3758/s13428-014-0493-8}, issn = { 1554-3528}, year = {2014}, date = {2014-06-10}, journal = {Behavior Research Methods}, volume = {47}, number = {3}, pages = {620-631}, abstract = {DMDX is a software package for the experimental control and timing of stimulus display for Microsoft Windows systems. DMDX is reliable, flexible, millisecond accurate, and can be downloaded free of charge; therefore it has become very popular among experimental researchers. However, setting up a DMDX-based experiment is burdensome because of its command-based interface. Further, DMDX relies on RTF files in which parts of the stimuli, design, and procedure of an experiment are defined in a complicated (DMASTR-compatible) syntax. Other experiment software, such as E-Prime, Psychopy, and WEXTOR, became successful as a result of integrated visual authoring tools. Such an intuitive interface was lacking for DMDX. We therefore created and present here Visual DMDX (http://visualdmdx.com/), a HTML5-based web interface to set up experiments and export them to DMDX item files format in RTF. Visual DMDX offers most of the features available from the rich DMDX/DMASTR syntax, and it is a useful tool to support researchers who are new to DMDX. Both old and modern versions of DMDX syntax are supported. Further, with Visual DMDX, we go beyond DMDX by having added export to JSON (a versatile web format), easy backup, and a preview option for experiments. In two examples, one experiment each on lexical decision making and affective priming, we explain in a step-by-step fashion how to create experiments using Visual DMDX. We release Visual DMDX under an open-source license to foster collaboration in its continuous improvement. }, keywords = {DMDX, HTML5, Internet-based research, JSON}, pubstate = {published}, tppubtype = {article} } DMDX is a software package for the experimental control and timing of stimulus display for Microsoft Windows systems. DMDX is reliable, flexible, millisecond accurate, and can be downloaded free of charge; therefore it has become very popular among experimental researchers. However, setting up a DMDX-based experiment is burdensome because of its command-based interface. Further, DMDX relies on RTF files in which parts of the stimuli, design, and procedure of an experiment are defined in a complicated (DMASTR-compatible) syntax. Other experiment software, such as E-Prime, Psychopy, and WEXTOR, became successful as a result of integrated visual authoring tools. Such an intuitive interface was lacking for DMDX. We therefore created and present here Visual DMDX (http://visualdmdx.com/), a HTML5-based web interface to set up experiments and export them to DMDX item files format in RTF. Visual DMDX offers most of the features available from the rich DMDX/DMASTR syntax, and it is a useful tool to support researchers who are new to DMDX. Both old and modern versions of DMDX syntax are supported. Further, with Visual DMDX, we go beyond DMDX by having added export to JSON (a versatile web format), easy backup, and a preview option for experiments. In two examples, one experiment each on lexical decision making and affective priming, we explain in a step-by-step fashion how to create experiments using Visual DMDX. We release Visual DMDX under an open-source license to foster collaboration in its continuous improvement. |