Evidence map›Paper›PMID 27925650›Full record

ArticlePsychophysiology2017

A pupil size response model to assess fear learning.

Christoph W Korn, Matthias Staib, Athina Tzovara, Giuseppe Castegnetti, Dominik R Bach

Abstract read
In one paragraph

Article in Psychophysiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed
–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

45 citing papers in PubMed.

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  17. Pupillary Responses Reflect Dynamic Changes in Multiple Cognitive Factors During Associative Learning in Primates.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2024
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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

5 authors.

Christoph W KornDepartment of Psychiatry, Psychotherapy, and Psychosomatics, University of Zurich, Zurich, Switzerland.
Matthias StaibDepartment of Psychiatry, Psychotherapy, and Psychosomatics, University of Zurich, Zurich, Switzerland.
Athina TzovaraDepartment of Psychiatry, Psychotherapy, and Psychosomatics, University of Zurich, Zurich, Switzerland.
Giuseppe CastegnettiDepartment of Psychiatry, Psychotherapy, and Psychosomatics, University of Zurich, Zurich, Switzerland.
Dominik R BachDepartment of Psychiatry, Psychotherapy, and Psychosomatics, University of Zurich, Zurich, Switzerland.

Funding

Swiss National Science Foundation 149586Wellcome TrustWellcome Trust 091593/Z/10/Z
6 · The paper itself

Abstract

During fear conditioning, pupil size responses dissociate between conditioned stimuli that are contingently paired (CS+) with an aversive unconditioned stimulus, and those that are unpaired (CS-). Current approaches to assess fear learning from pupil responses rely on ad hoc specifications. Here, we sought to develop a psychophysiological model (PsPM) in which pupil responses are characterized by response functions within the framework of a linear time-invariant system. This PsPM can be written as a general linear model, which is inverted to yield amplitude estimates of the eliciting process in the central nervous system. We first characterized fear-conditioned pupil size responses based on an experiment with auditory CS. PsPM-based parameter estimates distinguished CS+/CS- better than, or on par with, two commonly used methods (peak scoring, area under the curve). We validated this PsPM in four independent experiments with auditory, visual, and somatosensory CS, as well as short (3.5 s) and medium (6 s) CS/US intervals. Overall, the new PsPM provided equal or decisively better differentiation of CS+/CS- than the two alternative methods and was never decisively worse. We further compared pupil responses with concurrently measured skin conductance and heart period responses. Finally, we used our previously developed luminance-related pupil responses to infer the timing of the likely neural input into the pupillary system. Overall, we establish a new PsPM to assess fear conditioning based on pupil responses. The model has a potential to provide higher statistical sensitivity, can be applied to other conditioning paradigms in humans, and may be easily extended to nonhuman mammals.

Indexed as

Acoustic StimulationAdultConditioning, ClassicalFearFemaleHumansLinear ModelsMaleModels, NeurologicalPhotic StimulationPhysical StimulationPsychophysicsPupilYoung AdultAuditoryGeneral linear modelResponse functionsSomatosensoryVisual

Identifiers

PMID27925650
PMCPMC5324687

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.