Evidence map›Paper›PMID 39856471›Full record

ArticleBehavior research methods2025

The fundamentals of eye tracking part 2: From research question to operationalization.

Ignace T C Hooge, Antje Nuthmann, Marcus Nyström, Diederick C Niehorster, Gijs A Holleman, Richard Andersson, Roy S Hessels

Abstract read
In one paragraph

Article in Behavior research methods, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

16 citing papers in PubMed, 1 synthesis or guideline pooled it.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Ignace T C HoogeExperimental Psychology, Helmholtz Institute, Utrecht, The Netherlands. i.hooge@uu.nl.
Antje NuthmannInstitute of Psychology, Kiel University, Kiel, Germany.
Marcus NyströmLund University Humanities Lab, Lund University, Lund, Sweden.
Diederick C NiehorsterLund University Humanities Lab and Department of Psychology, Lund University, Lund, Sweden.
Gijs A HollemanDepartment of Cognitive Neuropsychology, Tilburg University, Tilburg, the Netherlands.
Richard AnderssonTobii AB, Danderyd, Sweden.
Roy S HesselsExperimental Psychology, Helmholtz Institute, Utrecht, The Netherlands.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In this article, we discuss operationalizations and examples of experimental design in eye-tracking research. First, we distinguish direct operationalization for entities like saccades, which are closely aligned with their original concepts, and indirect operationalization for concepts not directly measurable, such as attention or mind-wandering. The latter relies on selecting a measurable proxy. Second, we highlight the variability in algorithmic operationalizations and emphasize that changing parameters can affect outcome measures. Transparency in reporting these parameters and algorithms is crucial for comparisons across studies. Third, we provide references to studies for common operationalizations in eye-tracking research and discuss key operationalizations in reading research. Fourth, the IO-model is introduced as a tool to help researchers operationalize difficult concepts. Finally, we present three example experiments with useful methods for eye-tracking research, encouraging readers to consider these examples for inspiration in their own experiments.

Indexed as

Eye MovementsEye-Tracking TechnologyResearch DesignAlgorithmsAttentionHumansReadingExperimental designEye trackingOperationalization

Identifiers

PMID39856471
PMCPMC11761893

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.