Browsing by Author "Hepdarcan, Ilgim"

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The Distance Effect in a Response Inhibition Task
(John Wıley & Sons Ltd, 2023) Dural, Seda; Bulut, Merve; Palaz, Ezgi; Hepdarcan, Ilgim
[No abstract available]
Citation - WoS: 5
Citation - Scopus: 6
The Distance Effect on Discrimination Ability and Response Bias During Magnitude Comparison in a Go/No-go Task
(Springer, 2021) Hepdarcan, Ilgim; Bulut, Merve; Palaz, Ezgi; Can, Seda; Dural, Seda
The distance effect is the change in the performance during numerical magnitude comparison, depending on the numerical distance between the compared numbers (Moyer & Landauer, Nature, 215[5109], 1519-1520, 1967). This effect is generally accepted as evidence for the mental number line (MNL) hypothesis, which proposes that the mental representation of the numbers align in an increasing linear (or monotone) order. The majority of studies investigating the distance effect are focused on the reaction time (RT) findings, which show slower responses for closer numbers. In the present study, we examined the distance effect by applying signal detection theory (SDT) to a magnitude comparison task. We aimed to reveal whether discrimination ability and the response bias measures were affected by the location of numbers on the MNL. To accomplish this, we developed a magnitude comparison task using a go/no-go procedure in which participants performed a magnitude comparison based on a reference number (i.e., 5). Results revealed a substantial distance effect in both sensitivity and response bias measures-a better discrimination performance for far numbers, and a larger response bias for close numbers. In addition, an RT distribution analysis revealed that the distance effect seems to originate mainly from slower responses. Based on the current data, we suggest that sensitivity and response bias measures could offer comprehensive information in the understanding of number-based decisions.
Magnitude-Space Representations in the N-Back Task: Long-Term Representations of Magnitudes Alter the Working Memory Performance
(Springer, 2024) Hepdarcan, Ilgim; Cetinkaya, Hakan; Dural, Seda
Prior research has predominantly examined the role of working memory (WM) in tasks involving numerical information and spatial properties, such as memorizing number sequences and performing parity judgment and magnitude comparison. In contrast to focusing solely on the effect of WM on number judgment tasks, our study investigates how magnitude-space associations affect WM task performance, emphasizing long-term representations, specifically the concept of mental number line (MNL) compatibility (small items on the left, large items on the right) in long-term memory (LTM). Moving from the idea of representations within LTM contribute to the functioning of WM during task execution, we explore the effects of congruent, incongruent, and negative congruent numerical and non-numerical magnitude-space associations on magnitude-based 1-back (low WM load) and 2-back (high WM load) tasks. MNL compatible n-back and test items are congruent, MNL compatible n-back and MNL incompatible (small on the right, large on the left) test items (or vice versa) are incongruent, and MNL incompatible n-back and test items are considered negative congruent. Because negative congruent and incongruent representations may not activate existing representations in LTM, as congruent representations, we expected worse WM performance in negative congruent and incongruent trials than in congruent trials. Results reveal that congruent and incongruent representations elicit more accurate and rapid responses than negative congruents, suggesting that congruent and incongruent representations contribute to task execution. Additionally, we observe a size effect for small numerical magnitudes and a reverse size effect for large physical magnitudes, pointing towards the coactivation of LTM and WM in magnitude-space relations.
Citation - WoS: 5
Citation - Scopus: 6
The Mediating Role of Needs Frustration in Relation Between Adolescent Triangulation and Adjustment
(Springer, 2023) Koçak, Aylin; Hepdarcan, Ilgim; Mumcu, Yağmur; Apuhan, Sena; Şensöz, Burak
Although the detrimental role of adolescent triangulation into interparental conflict on their adjustment is well documented, the possible intervening mechanisms have not been fully investigated. Guided by the self-determination theory, we aimed to examine the mediating role of needs frustration in the relationship between adolescent triangulation and adjustment, namely depressive feelings and subjective vitality. Participants were 461 Turkish high school students (Mage = 17.25, SD = 1.16; 64.21% females). Triangulation subscale of the Children’s Perception of Interparental Conflict Scale was used to measure the triangulation perception of adolescents, Basic Needs Frustration subscale of the Basic Psychological Need Satisfaction and Frustration Scale was used to measure adolescent needs frustration, Center for Epidemiologic Studies-Depression Scale, and Subjective Vitality Scale were employed to assess adolescent adjustment. The results of the path analysis showed that triangulation related positively to needs frustration, which in turn, positively predicted depressive feelings and negatively predicted subjective vitality. These findings indicated the significant intervening role of needs frustration in the relationship among adolescent triangulation, depressive feelings, and subjective vitality. The discussion focuses on the findings and implications for the familial and individual determinants of adolescent adjustment in the context of the self-determination theory and the potential avenues for future research. © 2023, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
Citation - WoS: 7
Citation - Scopus: 7
No Snarc Effect Among Left- To-Right Readers: Evidence From a Turkish Sample
(Univ Economics & Human Sciences Warsaw, 2023) Bulut, Merve; Hepdarcan, Ilgim; Palaz, Ezgi; Çeti̇nkaya, Hakan; Dural, Seda
The spatial-numerical association of response codes (SNARC) refers to the faster left-hand respons- es to smaller numbers and faster right-hand responses to larger numbers. Although easily repli- cable in Western cultures, the prevalence of the SNARC effect in other cultures has long been an issue. In the current study, we aimed to replicate the SNARC effect in a parity judgement task with Turkish participants (N=66) whose reading habits are entirely left-to-right. The results revealed no SNARC effect. To the best of our knowledge, this is the first finding indicating the absence of regu- lar SNARC effect among left-to-right readers in a classical parity judgement task. Based on these findings, we suggest that investigations of cultural influences on spatial-numerical associations should take a broader perspective rather than only focusing on reading habits.
Revisiting the SNARC Effect With Magnitude Comparison Task in a Null-SNARC Sample
(John Wiley & Sons Ltd, 2024) Korkut, Ilayda; Cetinkaya, Hakan; Hepdarcan, Ilgim; Gur, Ezgi; Dural, Seda
Citation - WoS: 2
Citation - Scopus: 2
Revisiting the Snarc Effect: Testing Magnitude Classification in a Turkish Sample Typically Lacking the Snarc Effect
(Routledge Journals, Taylor & Francis Ltd, 2025) Dural, Seda; Cetinkaya, Hakan; Hepdarcan, Ilgim; Gur, Ezgi; Korkut, Ilayda
This study investigates the SNARC effect in Turkish participants using a magnitude classification task to examine the roles of semantic influences and cultural experiences. While prior research has shown the absence of the SNARC effect in a parity judgment among Turkish participants who read from left to right, our findings further confirm its absence in a magnitude classification task, even when semantic demands are minimised. Instead, a robust distance effect was observed, pointing out the involvement of spatial number processing in the task. These findings are discussed in the context of possible multiple spatial mappings, shaped by Turkey's unique cultural and historical background, which may hinder the development of a dominant spatial-numerical association. Future research incorporating explicit spatial primes linked to various cultural experiences could clarify the mechanisms underlying the variability of SNARC effects and offer valuable insights into the relationship between cultural history and cognitive processes.