267 Works

W4M00007_Coffea-leaves

Cédric Delporte & Florence Souard
Study: Characterization of the coffee leaves metabolome composition in 9 species of Coffea (Rubiaceae) collected at 5 dates in 2016 (January – March - July- September – December) after aqueous extraction. A total of 169 samples (including 147 individual samples, 8 blanks and 14 QC pools) were analysed by reversed-phase (C18) liquid chromatography (LCMS) coupled to high-resolution mass. Dataset: In this study, a metabolomics analysis was conducted on 9 species of Coffea leaves using LC-HRMS...

Capillary blood collection via finger-prick

Vernon Coffey & Katsu Shike

How a distractor influences fixations during the exploration of natural scenes

Nathalie Guyader, Hélène Devillez & Anne Guérin-Dugué
The distractor effect is a well-established means of studying different aspects of fixation pro-gramming during the exploration of visual scenes. In this study, we present a task-irrelevant distractor to participants during the free exploration of natural scenes. We investigate the con-trol and programming of fixations by analyzing fixation durations and locations, and the link between the two. We also propose a simple mixture model evaluated using the Expectation-Maximization algorithm to test the distractor effect on...

Mobile eye tracking during real-world night driving: A selective review of findings and recommendations for future research

Ulrich Ansorge & Markus Grüner
We exhaustively review the published research on eye movements during real-world night driving, which is an important field of research as fatal road traffic accidents at night outnumber fatal accidents during the daytime. Eye tracking provides a unique window into the underlying cognitive processes. The studies were interpreted and evaluated against the background of two descriptions of the driving task: Gibson and Crooks’ (1938) description of driving as the visually guided selection of a driving...

Using coefficient K to distinguish ambient/focal visual attention during map viewing

Anna Niedzielska, Krzysztof Krejtz, Arzu Coltekin & Andrew Duchowski
We demonstrate the use of the ambient/focal coecient K for studying the dynamics of visual behavior when performing cartographic tasks. Participants viewed a cartographic map and satellite image of Barcelona while performing a number of map-related tasks. Cartographic maps can be viewed as summary representations of reality, while satellite images are typically more veridical, and contain considerably more information. Our analysis of traditional eye movement metrics suggests that the satellite representation facilitates longer fixation durations,...

Role of expectation and working memory constraints in Hindi comprehension: An eyetracking corpus analysis

Arpit Agrawal, Sumeet Agarwal & Samar Husain
We used the Potsdam-Allahabad Hindi eye-tracking corpus to investigate the role of word-level and sentence-level factors during sentence comprehension in Hindi. Extending previous work that used this eye-tracking data, we investigate the role of surprisal and retrieval cost metrics during sentence processing. While controlling for word-level predictors (word complexity, syllable length, unigram and bigram frequencies) as well as sentence-level predictors such as integration and storage costs, we find a significant effect of surprisal on first-pass...

Topology for gaze analyses - Raw data segmentation

Wolfgang H. Zangemeister & Oliver Hein
Recent years have witnessed a remarkable growth in the way mathematics, informatics,and computer science can process data. In disciplines such as machine learning,pattern recognition, computer vision, computational neurology, molecular biology,information retrieval, etc., many new methods have been developed to cope with theever increasing amount and complexity of the data. These new methods offer interestingpossibilities for processing, classifying and interpreting eye-tracking data. Thepresent paper exemplifies the application of topological arguments to improve theevaluation of eye-tracking data....

Reading English-Language Haiku: Processes of Meaning Construction Revealed by Eye Movements

Thomas Geyer, Jim Kacian, Hermann J Mueller, Stella Pierides & Franziska Günther
In the present study, poets and cognitive scientists came together to investigate the construction of meaning in the process of reading normative, 3-line English-language haiku (ELH), as found in leading ELH journals. The particular haiku which we presented to our readers consisted of two semantically separable parts, or images, that were set in a ‘tense’ relationship by the poet. In our sample of poems, the division, or cut, between the two parts was positioned either...

Where did I come from? Where am I going? Functional influences on visual search fixation duration

Harold H. Greene & James M. Brown
Real time simulation of visual search behavior can occur only if the control of fixation durations is sufficiently understood.  Visual search studies have typically confounded pre- and post-saccadic influences on fixation duration.  In the present study, pre- and post-saccadic influences on fixation durations were compared by considering saccade direction. Novel use of a gaze-contingent moving obstructer paradigm also addressed relative contributions of both influences to total fixation duration.   As a function of saccade direction, pre-saccadic...

Eye tracking in Educational Science: Theoretical frameworks and research agendas

Kenneth Holmqvist, Halszka Jarodzka & Hans Gruber
Eye tracking is increasingly being used in Educational Science and so has the interest of the eye tracking community grown in this topic. In this paper we briefly introduce the discipline of Educational Science and why it might be interesting to couple it with eye tracking research. We then introduce three major research areas in Educational Science that have already successfully used eye tracking: First, eye tracking has been used to improve the instructional design...

Increased microsaccade rate in individuals with ADHD traits

Tom Stafford, Paul Overton & Maria Panagiotidi
Microsaccades are involuntary, small, jerk-like eye-movements with high-velocity that are observed during fixation. Abnormal microsaccade rates and characteristics have been observed in a number of psychiatric and developmental disorders. In this study, we examine microsaccade differences in 43 non-clinical participants with high and low levels of ADHD-like traits, assessed with the Adult ADHD Self-Report Scale (ASRS, Kessler, Adler, et al., 2005). A simple sustained attention paradigm, which has been previously shown to elicit microsaccades, was...

The effect of age on gaze behavior in drivers and pedestrians – a review

Gal Ziv & Ronnie Lidor
Gaze behavior can play an important role in the safety of both older drivers and older pedestrians, and therefore evidence-based knowledge related to gaze behavior in the older population should be communicated to those professionals who regularly work with this group. A review of 25 studies examining the effect of age on gaze behavior in drivers and pedestrians was conducted. A number of differences in gaze behavior in older and younger drivers and pedestrians are...

W4M00006_BPA-MMusculus

Marie Tremblay-Franco
Study: Metabolic shifts induced in vivo after perinatal exposure to low doses of BPA in CD-1 mice were assessed. In this study conducted by the ToxAlim-MeX team and the Tufts University school of medicine (Boston, MA, USA) in collaboration with the AXIOM-MetaToul-MetaboHUB platform, aqueous brain extracts from twenty-four 21-day-old pups whose mothers were exposed to either 0.025µg or 0.25µg BPA/kg BW/day during gestation and lactation were analyzed by NMR Spectroscopy. Dataset: The dataset contains 24...

Eye tracking study of attention to print advertisements: Effects of typeface figuration

Klementina Možina, Uroš Nedeljković, Irma Puškarević & Vladimir Dimovski
The use of rhetorical figures has become a widely–accepted method for capturing attention and positively increasing cognitive effort in print advertisements. So far research studies mostly analyzed the effect of rhetorical figures in the written as well as pictorial elements of an ad. However, there have been few studies addressing the effect of rhetorical figuration in the specific area of typeface design. This study analyzes the effects of typeface figuration (i.e., regular vs. irregular stylization...

W4M00004_GCMS-Algae

Yann Guitton & Sophie Goulitquer
Study: Characterization of the physiological variations of the metabolome in algae exposed to 3 different abiotic stress (salt concentration). Dataset: The dataset contains 12 mzXML files created from Agilent RAW GC-MS file. 4 replicats per conditions: i) Condition 01: Fresh water strain in 1.6 ppt NaCl; ii) Condition 02: Fresh water strain in 32 ppt NaCl; iii) Condition 03: Sea water strain in 32 ppt NaCl. Workflow: The workflow consists of the following steps: preprocessing...

W4M00003_Diaplasma

Etienne Thévenot & Philippe Rinaudo
Study: Identification of metabolomics signatures for patient stratification between type 1 versus type 2 diabetes mellitus. Dataset: plasma samples from 69 diabetic patients were analyzed by reversed phase (C18) ultra-high performance liquid chromatography (UPLC) coupled to high-resolution mass spectrometry (Orbitrap Exactive). Age and body mass index (BMI) of patients are also provided as sample metadata since type 2 patients from this cohort are significantly older and with a higher BMI. The peak table contains 5,501...

W4M00002_Sacurine-comprehensive

Etienne Thévenot
Study: Characterization of the physiological variations of the metabolome in biofluids is critical to understand human physiology and to avoid confounding effects in cohort studies aiming at biomarker discovery. In this study conducted by the MetaboHUB French Infrastructure for Metabolomics, urine samples from 184 volunteers were analyzed by reversed-phase (C18) ultrahigh performance liquid chromatography (UPLC) coupled to high-resolution mass spectrometry (LTQ-Orbitrap). Dataset: The dataset contains 234 mzML files from the negative ionization mode, corresponding to...

W4M00001_Sacurine-statistics

Etienne Thévenot
Study: Characterization of the physiological variations of the metabolome in biofluids is critical to understand human physiology and to avoid confounding effects in cohort studies aiming at biomarker discovery. Dataset: In this study conducted by the MetaboHUB French Infrastructure for Metabolomics, urine samples from 184 volunteers were analyzed by reversed-phase (C18) ultrahigh performance liquid chromatography (UPLC) coupled to high-resolution mass spectrometry (LTQ-Orbitrap). A total of 258 metabolites were identified at confidence levels provided by the...

W4M00005_Ractopamine-Pig

Yann Guitton
Study: Characterization of the physiological variations induced by ractopamine ingestion in pigs. Dataset: The dataset contains 164 mzXML files created from Q-Exactive (*.raw) files. 124 samples and 40 QCs injected in 4 batches. Design: 2 Classes (Treated, Controls) from serum collected at day 3, 9, 16, 18, 23, 29 with for each sample 2 extraction procedure (M and MW): QCs with 40 files, pool of every samples extracts M + MW, Controls with Extraction M...

Learning to search. The importance of eye movements in the decrease of response times during a visual choice reaction time task

Monika Mak, Aleksandra Kroll & Jerzy Samochowiec
Reaction times are often used as an indicator of the efficiency of the processes in thecentral nervous system. While extensive research has been conducted on the possibleresponse time correlates, the role of eye movements in visual tasks is yet unclear. Here wereport data to support the role of eye movements during visual choice reaction time training.Participant performance, reaction times, and total session duration improved. Eyemovementsshowed expected changes in saccade amplitude and resulted in improvementin visual...

User-Friendly Locations of Error Messages in Web Forms: An Eye Tracking Study

Yavuz Inal
Error messages presented to users are one of the most important elements of Web forms. Error messages are embedded in different parts of the forms available on the Internet and presented in various formats. One of the measures of a user-friendly error message design is the ability to easily capture users’ attention and facilitate fast error correction. In this empirical study, I tested four different locations of error messages frequently used in Web forms on...

Eye Pointing in Stereoscopic Displays

Lin, Chiuhsiang Joe; Department Of Industrial Management - National Taiwan University Of Science And Technology & Widyaningrum, Retno; Department Of Industrial Management - National Taiwan University Of Science And Technology
This study investigated eye pointing in stereoscopic displays. Ten participants performed 18 tapping tasks in stereoscopic displays with three different levels of parallax (at the screen, 20 cm and 50 cm in front of the screen). The results showed that parallax had significant effects on hand movement time, eye movement time, index of performance in hand click and eye gaze. The movement time was shorter and the performance was better when the target was at...

Eye movements as a window to cognitive processes

Niklas Wilming, Tim C. Kietzmann, Jose P. Ossandón, Benedikt V. Ehinger, Kai Kaspar, Ricardo R. Gameiro, Peter König & Selim Onat
Eye movement research is a highly active and productive research field. Here we focus on how the embodied nature of eye movements can act as a window to the brain and the mind. In particular, we discuss how conscious perception depends on the trajectory of fixated locations and consequently address how fixation locations are selected. Specifically, we argue that the selection of fixation points during visual exploration can be understood to a large degree based...

A probabilistic approach for eye-tracking based process tracing in catalog browsing

Erina Ishikawa Schaffer, Hiroaki Kawashima & Takashi Matsuyama
Eye movements are an important cue to understand consumer decision processes. Findings from existing studies suggest that the consumer decision process consists of a few different browsing states such as screening and evaluation. This study proposes a hidden Markov-based gaze model to reveal the characteristics and temporal changes of browsing states in catalog browsing situations. Unlike previous models that employ a heuristic rule-based approach, our model learns the browsing states in a bottom-up manner. Our...

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