Research
Ongoing Research
Time-Dependent Effects of MNL-Compatible and Incompatible Stimulus–Response Relations on Magnitude–Space Associations
Current Status: Designing the study
Investigators: Ayşenur CANDEMİR, Melike ŞEFİKOĞLU, Seda DURAL
Concept: Tasks used to measure spatial–numerical associations (SNAs) differ substantially in their spatial coding, decision structure, response architecture, and response complexity. This project examines whether SNA effects observed across commonly used tasks reflect a single shared spatial–numerical representation or instead arise from distinct, task-dependent cognitive mechanisms by analyzing task-specific performance and cross-task correlations.
Funding: BAP-2025 (submitted)
Contact: melike.sefikoglu@ieu.edu.tr
Cognitive Predispositions and the SNARC Effect: Investigating Individual Differences in the Spatial-Numerical Associations
Current Status: Preparation of the experimental program
Investigators: Hakan ÇETİNKAYA, Seda DURAL, Ezgi GÜR, Merve BULUT KÖSE, Şimal YENİGÜLLÜ, İrem AYDIN, Zeynep TUNCALI, Özce CİNOĞLU
Concept: This project investigates how SNAs develop and how individual cognitive predispositions modulate the SNARC effect.
Funding: TÜBİTAK-1001
Contact: hakan.cetinkaya@yasar.edu.tr
Investigating the Spatial Representations of Non-Symbolic Numerical Magnitudes with Different Valence Levels
Current Status: Preparation of the experimental program
Investigators: Duru Başak ÖZBEK, Seda DURAL, Hakan ÇETİNKAYA
Concept: The aim of the study is to examine the spatial representations of non-symbolic numerical magnitudes with positive and negative valence levels using magnitude comparison and valence tasks.
Funding: TÜBİTAK 2209-A (submitted)
Contact: durubasakozbekuni@gmail.com
Spatial Representations of Temporal Information: Exploring the STEARC effect for early and late events
Current Status: Writing thesis
Investigators: İrem AYDIN, Ezgi GÜR, Seda DURAL, Hakan ÇETİNKAYA
Concept: The aim of this study is to investigate space-time interactions in a Turkish sample using the Spatial-Temporal Association of Response Codes (STEARC) paradigm.
Funding:
Contact: irem.aydin@std.izmirekonomi.edu.tr
Investigating space-number associations in a Turkish sample using a magnitude comparison task
Current Status: Data analysis
Investigators: Ayşenur CANDEMİR, Merve BULUT, Seda DURAL, Hakan ÇETİNKAYA
Concept: This study aims to investigate space – number associations (SNAs) in a Turkish sample using a magnitude comparison task, with a focus on the impact of different hand settings. By comparing single-hand and two-hand response setups, the research seeks to clarify how hand settings and different methodologies influence SNAs.
Funding: TÜBİTAK 1002-A
Contact: aysenurcandemir99@gmail.com
Investigating instruction effects on SNARC phenomena
Current Status: Writing thesis
Investigators: : İlayda KORKUT, Samet KAHRAMAN, Seda DURAL, Hakan ÇETİNKAYA, Ezgi GÜR
Concept: The aim of this study is to explore how instructional cues influence the way humans associate numbers with spatial representations.
Funding:
Contact: ilayda.korkut@ieu.edu.tr
Investigating the spatial representation of object sizes in the context of size comparison and size classification tasks
Current Status: Data analysis
Investigators: : Melike ŞEFiKOĞLU, Seda DURAL, Hakan ÇETİNKAYA
Concept: The study investigates spatial representation of object sizes through magnitude classification and comparison tasks, aiming to examine object size representation and compare task methodologies.
Funding: TÜBİTAK 2209-A
Contact: melike.sefikoglu@ieu.edu.tr
Investigation of Mental Number Line Compatibility within the Context of Go/No Go Task
Current Status: Data analysis
Investigators: : Şimal YENİGÜLLÜ, Seda DURAL, Hakan ÇETİNKAYA
Concept: The aim of this study is to examine space-number relations in a Turkish sample in the context of a numerical magnitude comparison task.
Funding: TÜBİTAK 2209-A
Contact: simal.yenigullu@std.ieu.edu.tr
How Does the Presence of Reference Point Illustration Modulates the Expression of SNAs in Magnitude Classification Task?
Current Status: Data analysis
Investigators: : Samet KAHRAMAN, İlayda KORKUT, Ezgi GÜR, Hakan ÇETİNKAYA, Seda DURAL
Concept: Previous investigation of SNAs and SNARC effect in Turkish samples create an interesting observation. In the absense of an obvious reference presentation for comparison/classification, results points to a left-to-right oriented MNL. However, when the reference for comparison is visually absent, there is no support for the MNL account. The aim of this study is to investigate how responses to a magnitude classification task, which is a method frequently used in the study of SNAs, will be affected in MNL congruent and incongruent trials by creating contexts in which the reference point is visually present or absent on a number line during task execution.
Funding: TÜBİTAK 2209-A
Contact: samet.kahraman@std.ieu.edu.tr
Completed Research
Central Numbers, Single-Hand Responses: An exploration of the SNARC effect without spatial cues
Investigators: Zeynep TUNCALI, Melike ŞEFİKOĞLU, Duru Başak ÖZBEK, Hayal Ece GÜLER, Seda DURAL, Hakan ÇETİNKAYA
Concept: This study examines the SNARC effect using a go/no-go task with central stimulus presentation and single-hand responses, aiming to test whether spatial-numerical associations persist without external spatial cues.
Funding:
Contact: zeynep.tuncali@std.izmirekonomi.edu.tr
Emotions Disrupt but Do Not Map onto Spatial-Numerical Associations
Investigators: Zeynep TUNCALI, Seda DURAL, Hakan ÇETİNKAYA
Concept: The main aim of this study is to test whether emotional facial expressions varying in intensity levels are represented on a spatial continuum similarly to numerical magnitude, and to examine whether prior engagement with the emotional task modulates subsequent spatial–numerical associations.
Funding:
Contact: zeynep.tuncali@std.izmirekonomi.edu.tr
How Does Visual Hand Prime Guide Spatial-Numerical Mapping During Magnitude Classification?
Investigators: Seda DURAL, Zeynep TUNCALI, Merve BULUT, Ezgi GÜR, Hakan ÇETİNKAYA
Concept: This study investigates whether task-irrelevant visual hand primes modulate the SNARC effect in a magnitude classification task. Accordingly, this study evaluates whether a brief visual cue associated with a specific hand can implicitly guide spatial–numerical mapping.
Funding:
Contact: zeynep.tuncali@std.izmirekonomi.edu.tr
Representational Context Modulates the Direction and Transiency of Practice Effects on SNARC
Investigators: : Ezgi PALAZ, Hakan ÇETİNKAYA, Seda DURAL
Concept: This research explores the influence of two contrasting representational contexts (ruler vs clockface) on the emergence and persistence of the SNARC effect under two opposing spatial-numerical practices (MNL-compatible vs MNL-incompatible).
Funding: BAP 2023-03
Contact: ezgipalaz@hotmail.com
The interplay between the stroop-congruency and MNL-compatibility in the object size judgement task
Investigators: : Melike ŞEFİKOĞLU, İlayda KORKUT, Seda DURAL, Hakan ÇETİNKAYA
Concept: This study examines the impact of MNL-compatibility on size judgments of objects, focusing on how spatial positioning of the object effects performance in a Stroop-like task involving conceptual and physical magnitudes.
Funding:
Contact: melike.sefikoglu@std.izmirekonomi.edu.tr
Directional Spatial Numerical Associations: The effect of binary response codes
Investigators: Merve BULUT, Seda DURAL, Hakan ÇETİNKAYA, Ayşenur CANDEMİR, Melike ŞEFİKOĞLU, Beria HAUGEN
Concept: The main aim of this study is to activate the spatial component of space-number relations by varying it in two different ways (left and right spatial components based on the participants’ responses or spatial locations of numbers) and to examine how these activations affect mental processes related to numerical operations, especially within the scope of the SNARC effect.
Funding:
Contact: bulut.merve@ieu.edu.tr
Do reading habits provide any insight into the absence of SNARC effect in the Turkish sample?
Investigators: Ceren KAYA, Ayşenur CANDEMİR, Duru KAYA, Hakan ÇETİNKAYA, Seda DURAL
Concept: The aim of the study is to investigate the reading direction on SNARC effect by comparing SNARC performance of individuals based on their reading habits (e.i., number of books read in a year).
Funding:
Contact: ceren.kaya2019@std.izmirekonomi.edu.tr
Foot SNARC: The effects of hand positions on the magnitude classification
Investigators: Elvin Naz TUNÇ, Seda DURAL, Hakan ÇETİNKAYA
Concept: The study investigates how hand posture influences the SNARC effect. It aims to understand how proprioceptive cues affect numerical cognition by manipulating participants’ hand postures and observing their responses during classifying the magnitude of numbers by their feet.
Funding:
Contact: elvin.tunc@std.izmirekonomi.edu.tr
Modulating Learning Performance through the Pairing of Emotions with Different SNAs
Investigators: Bengi KAMAR, Seda DURAL, Hakan ÇETİNKAYA
Concept: This research suggests that SNA-compatible arrangements evoke positive feelings, often linked to high processing fluency. However, the relationship between processing fluency and positive emotions within SNAs remains unclear. This study explores the selective association effect, suggesting that SNA-compatible arrangements more readily form conditioned associations with positive emotions.
Funding:
Contact: bengikamar@gmail.com
Hemispheric specizilation in numerical cognition
Investigators: İlayda KORKUT, Şimal YENİGÜLLÜ, Samet KAHRAMAN, Ezgi GÜR, Seda DURAL, Hakan ÇETİNKAYA
Concept: The purpose of this study is to investigate how numerical cognition affects hemispheric specizilation. It also attempts to evaluate the ways in which linkages between numbers and space are influenced by the depth of semantic processing and directional preferences.
Funding:
* This study was cancelled after pilot data
Contact: simal.yenigullu@std.izmirekonomi.edu.tr
SNARC effect in a transfer paradigm: Long-lasting effects of stimulus-response compatibility practices
Investigators: Merve BULUT, Hakan ÇETİNKAYA, Seda DURAL
Concept: The current study examined the possible long-lasting effects of magnitude-relevant stimulus-response compatibility (SRC) practices on the SNARC effect in a transfer paradigm.
Funding: TÜBİTAK-1002 project
Contact: merve.bulutkose@yasar.edu.tr
Revisiting the SNARC effect: Testing magnitude classification in a Turkish sample typically lacking the SNARC effect.
Investigators: Ilgım HEPDARCAN, İlayda KORKUT, Ezgi GÜR, Seda DURAL, Hakan ÇETİNKAYA
Concept: This study, submitted as a brief report for the article “No SNARC Effect Among Left-to-Right Readers: Evidence from a Turkish Sample” aimed to investigate the SNARC effect using the widely recognized magnitude classification method.
Funding:
Contact: ilayda.korkut@ieu.edu.tr
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