Evidence map›Paper›PMID 30511158›Full record

ArticlePsychological research2020

SNARC-like compatibility effects for physical and phenomenal magnitudes: a study on visual illusions.

Valter Prpic, Alessandro Soranzo, Ilaria Santoro, Carlo Fantoni, Alessandra Galmonte, Tiziano Agostini, Mauro Murgia

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Article in Psychological research, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing 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

17 citing papers in PubMed.

  1. Article
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  3. A SNARC-like effect for visual speed.Attention, perception & psychophysics · 2025
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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.

Valter PrpicInstitue for Psychological Science, Faculty of Health and Life Sciences, De Montfort University, The Newarke, Leicester, LE1 9BH, UK. valter.prpic@dmu.ac.uk.ORCID http://orcid.org/0000-0002-1382-0951
Alessandro SoranzoDepartment of Psychology, Sociology and Politics, Sheffield Hallam University, Sheffield, S10 2BQ, UK.
Ilaria SantoroDepartment of Life Sciences, University of Trieste, Via Weiss, 21, building "W", 34128, Trieste, Italy.
Carlo FantoniDepartment of Life Sciences, University of Trieste, Via Weiss, 21, building "W", 34128, Trieste, Italy.
Alessandra GalmonteDepartment of Medical, Surgical and Health Sciences, University of Trieste, strada di Fiume, 447, 34100, Trieste, Italy.
Tiziano AgostiniDepartment of Life Sciences, University of Trieste, Via Weiss, 21, building "W", 34128, Trieste, Italy.
Mauro MurgiaDepartment of Life Sciences, University of Trieste, Via Weiss, 21, building "W", 34128, Trieste, Italy.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Both numerical and non-numerical magnitudes elicit similar Spatial-Numerical Association of Response Codes (SNARC) effects, with small magnitudes associated with left hand responses and large magnitudes associated with right hand responses (Dehaene et al., J Exp Psychol Gen 122(3), 371, 1993). In the present study, we investigated whether the phenomenal size of visual illusions elicits the same SNARC-like effect revealed for the physical size of pictorial surfaces. Four experiments were conducted by using the Delboeuf illusion (Experiment 1) and the Kanizsa triangle illusion (Experiments 2, 3 and 4). Experiment 1 suggests the presence of a SNARC-like compatibility effect for the physical size of the inducers, while this effect was not revealed for the phenomenal size of the induced elements, possibly masked by a stronger effect of the inducers. A SNARC-like effect for the phenomenal size of the Kanizsa triangle was revealed when participants directly compared the size of the triangles (Experiment 4). Conversely, when participants performed an indirect task (orientation judgment), the SNARC-like effect was present neither for the illusory nor for the physical displays (Experiments 2 and 3). The effect revealed for the size of illusory triangles was comparable to that of real triangles with physical contours, suggesting that both phenomenal and physical magnitudes similarly elicit SNARC-like effects.

Indexed as

Form PerceptionJudgmentSpace PerceptionFemaleHumansIllusionsMaleOrientationPhotic StimulationYoung Adult

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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.