Ahu Gökçe

Gökçe, Ahu

Name Variants

G.,Ahu
AHU GÖKÇE
Ahu GÖKÇE
G., Ahu
GÖKÇE, AHU
Gökçe, Ahu
Gökçe, AHU
A. Gökçe
Gokce,Ahu
Ahu, Gokce
GÖKÇE, Ahu
Gokce,A.
Gökçe,A.
Gökçe, A.
Ahu Gökçe
Gokce, Ahu

Job Title

Doç. Dr.

Email Address

ahu.gokce@khas.edu.tr

ORCID ID

0000-0002-5032-7007

Scopus Author ID

54391048300

Full item page

Scholarly Output

16

Articles

13

Citation Count

30

Supervised Theses

2 Scholarly Output Search Results

Now showing 1 - 10 of 16

Psikoloji ve Açık Bilim
(İstanbul Bilgi Üniversitesi, 2022-06) Gökçe, Ahu; Akirmak, Umit; Cem Tüzün
Bu kitap yaklaşık son on yıldır var olan, üzerinde daha fazla düşünülerek evirilmiş ve gelişen teknolojinin desteğini de alarak daha önce var olmayan birçok imkân sunan açık bilim pratikleri üzerine yazılmıştır. Açık bilim ve pratikleri birçok araştırmacı tarafından bilinmemektedir ve tecrübeli araştırmacılara dahi yabancı bir kavram olabilmektedir. Açık bilim prensiplerini teorik olarak bilen ama nasıl uygulanacağı konusunda tereddütte olan araştırmacılar da vardır ki çok kısa bir geçmişi olan bir kavram olduğu düşünüldüğünde bu pek şaşırtıcı değildir. Bu kitabı yazma amacımız açık bilim prensip ve uygulamalarını hem teorik hem de pratik olarak tanıtmak ve bu sayede araştırmacıların kendi bilimsel araştırmalarında bu pratiklerden faydalanmasını sağlamaktır. Bu kitap yüksek lisans ve üzeri eğitim almış tüm araştırmacıların faydalanabileceği bir kaynaktır.
Yiyeceklerin Uzamsal Temsili
(2023) Okur, Betül; Gökçe, Ahu
Evrim perspektifinden, insanlar hayatta kalabilmek için yüksek kalorili yiyeceklere karşı bir yanlılık geliştirmişlerdir. Ancak bu yanlılık, besin bulmakta zorlanmayan modern insanlar için sağlık riskleri oluşturabilir. Bu risklerin önüne geçmek için insanların yiyecek seçimlerini sağlıklı yönde etkileyecek yöntemlere ihtiyaç vardır. Bu yöntemlerden biri, belli tür yiyecek türlerinin zihinsel olarak belli konumlarda temsil edilmesi, yani mekansal yanlılık olabilir. Bu tezde, yiyeceklerin mekandaki zihinsel temsili iki çalışma ile araştırılmıştır. Yiyeceklerin mekansal temsili, insanların sağlık algısı ve yiyecek tercihleri üzerinde önemli bir etkiye sahiptir. Çalışma 1, mekansal konumlar ile (sağlıksız) besinler arasında bir zihinsel temsil olup olmadığını araştırmayı amaçlamıştır. Sağlıklı (sağlıksız) besinlerin sol ve üst (sağ, alt) konumlara yerleştirilmesi, yiyeceklerin mekandaki zihinsel temsiline uygun olarak kabul edilmektedir. Yiyeceklerin, uzamsal boşluğa zihinsel uyumlu olarak yerleştirilmesinin görev performansını artıracağı hipotezi test edilmiştir. Sonuçlar, mekansal yanlılık veya yüksek kalori yanlılığını desteklememiştir. Mekansal yanlılık, Çalışma 2'de 2 deney ile daha detaylı olarak incelenmiştir. Sağlıklı yüksek kalorili ve sağlıksız düşük kalorili yiyeceklerin zihinsel mekansal temsili henüz gösterilmemiştir. Bu nedenle, Çalışma 2, sağlıklı ve sağlıksız yiyeceklerin mekandaki temsili üzerine araştırma yapmayı amaçlamıştır. Dört besin kategorisinin (sağlıklı düşük kalorili, sağlıklı yüksek kalorili, sağlıksız düşük kalorili, sağlıksız yüksek kalorili) mekansal temsili, bir dizi besin yerleştirme görevi ile değerlendirilmiştir. Sonuçlar sağlıklı ve sağlıksız yiyecekler için dikey yan yanlılık konusunda destek sunmuştur. Tüm deneylerde gerçek hayatta yiyecek seçimleri incelenmiş ve yüksek kalorili yanlılığın gerçek yaşam yiyecek seçimi davranışına yansıyıp yansımadığı araştırılmıştır. Sonuçlar, yüksek kalorili yiyeceklerin tercih edildiğini göstermiştir. Mekansal yanlılığı destekleyen bulgular, pazarlama ve tüketici davranışı araştırmalarında ürün yerleşimi düzenlemeleri aracılığıyla daha sağlıklı seçimlerin teşvik edilmesinde kullanılabilir.
Citation Count: 0
Exploring the spatial mental associations of distinct food types
(Academic Press Ltd- Elsevier Science Ltd, 2024) Okur, Betul; Gokce, Ahu
Previous research explored the spatial representations of healthy low -calorie and unhealthy high -calorie food items, revealing an association of healthy low -calorie food with left and top sides, and unhealthy/high-calorie food with right and top sides. This association, namely side bias, was limited to these specific categories leaving the representations of healthy high -calorie and unhealthy low -calorie food categories yet to be explored. Present study was designed to examine the spatial representation of four food categories (unhealthy low -calorie, unhealthy high -calorie, healthy low -calorie, healthy high -calorie) using a computerized food placement task. In Experiment 1, participants placed four food items from different categories into eight locations. In Experiment 2, identical task was used with the addition of centrally presented anchor food item to investigate the mental representation of food items in relation to each other. The frequency of placing food items in specific spatial locations were measured. The results of Experiment 1 provided partial support for side bias. However, the use of anchor items in Experiment 2 provided compelling evidence for vertical side bias, demonstrating consistent pattern of placing healthy foods on the upper sides and unhealthy foods on the lower sides. In both experiments, real -life food choices were examined to investigate whether the high -calorie bias would be observed in actual food choice behavior. The results from both experiments indicated strong preference to select high -calorie foods, supporting high -calorie bias. Overall, this study extends the evidence on the spatial representations of distinct food categories.
Citation Count: 11
Positional priming of visual pop-out search is supported by multiple spatial reference frames
(Frontiers Media S.A., 2015) Gokce,A.; Müller,H.J.; Geyer,T.
The present study investigates the representations(s) underlying positional priming of visual ‘pop-out’ search (Maljkovic and Nakayama, 1996). Three search items (one target and two distractors) were presented at different locations, in invariant (Experiment 1) or random (Experiment 2) cross-trial sequences. By these manipulations it was possible to disentangle retinotopic, spatiotopic, and object-centered priming representations. Two forms of priming were tested: target location facilitation (i.e., faster reaction times – RTs– when the trial n target is presented at a trial n-1 target relative to n-1 blank location) and distractor location inhibition (i.e., slower RTs for n targets presented at n-1 distractor compared to n-1 blank locations). It was found that target locations were coded in positional short-term memory with reference to both spatiotopic and object-centered representations (Experiment 1 vs. 2). In contrast, distractor locations were maintained in an object-centered reference frame (Experiments 1 and 2). We put forward the idea that the uncertainty induced by the experiment manipulation (predictable versus random cross-trial item displacements) modulates the transition from object- to space-based representations in cross-trial memory for target positions. © Copyright © 2015 Gokce, Müller and Geyer.
The Effects of Knowledge Evoking Style and Icon Arrays on Perceived Risk and Willingnes
(Kadir Has Üniversitesi, 2022) ÖZDEMİR, Deniz; Gokce, Ahu
One of the most denoted cognitive errors in terms of judgments of risk probabilities was denominator neglect, and it happens when people pay more attention to numerators (subsets) and neglect the denominators (superordinate sets) during risk judgments, and it arises from the "gist-pop-out" of the numerator according to Fuzzy Trace Theory (FTT) and is defined as a class inclusion error. Previous studies which focus on visual demonstration of risk probabilities suggest that visuals help improve risk comprehension (reduce denominator neglect) and gist/verbatim knowledge extraction. Icon arrays are known to be proper visual communicators for displaying part-to-whole relationships via showing numerator and the denominator visually and utilized in reducing denominator neglect. The main objective of the thesis is to investigate risk evaluations under different risk scenarios (Experiment 1A: non-medical; Experiment 1B: medical) and to investigate the effects of visual aids, knowledge instruction types, and numeracy, health literacy on complex risk judgments, confidence levels and willingness to choose better outcomes within the overarching scope of FTT. The main hypotheses are as follows: Visual aids and instruction types will help mitigate denominator neglect and then in turn, improve risk evaluations, and higher numeracy will yield better risk evaluation accuracies. The findings demonstrated contrary results in terms of visual aids, which have been known for mitigating the effects of denominator neglect, the effects of visual aids were not replicated. Instruction types did not have the main effect on risk evaluations to help to reduce denominator neglect. Numeracy was the most prominent factor in risk accuracy, confidence in answers, and willingness. Health literacy did not show the main effect on willingness. Denominator neglect was found only in Experiment 1B.
Citation Count: 6
Attachment Anxiety Benefits From Security Priming: Evidence From Working Memory Performance
(Public Library Science, 2018) Gökçe, Ahu; Harma, Mehmet
The present study investigates the relationship between the attachment dimensions (anxious vs. avoidance) and the cognitive performance of individuals specifically whether the attachment dimensions would predict the working memory (WM) performance. In the n-back task reflecting the WM capacity both attachment related and non-attachment related words were used. Participants were randomly assigned into two groups that received either the secure or the neutral subliminal priming. In the secure priming condition the aim was to induce sense of security by presenting secure attachment words prior to the n-back task performance. In neutral priming condition neutral words that did not elicit sense of security were presented. Structural equation modeling revealed divergent patterns for attachment anxiety and avoidance dimensions under the different priming conditions. In neutral priming condition WM performance declined in terms of capacity in the n-back task for individuals who rated higher levels of attachment anxiety. However in the secure priming condition WM performance was boosted in the n-back task for individuals who rated higher levels of attachment anxiety. In other words the subliminal priming of the security led to increased WM capacity of individuals who rated higher levels of attachment anxiety. This effect however was not observed for higher levels of attachment avoidance. Results are discussed along the lines of hyperactivation and deactivation strategies of the attachment system.
Citation Count: 10
Positional Priming of Visual Pop-Out Search Is Supported by Multiple Spatial Reference Frames
(Frontiers Media, 2015) Gökçe, Ahu; Mueller, Hermann J.; Geyer, Thomas
The present study investigates the representations(s) underlying positional priming of visual pop-out' search (Maljkodc and Nakayama 1996). Three search items (one target and two distractors) were presented at different locations in invariant (Experiment 1) or random (Experiment 2) cross-trial sequences. By these manipulations it was possible to disentangle retinotopic spatiotopic and object-centered priming representations. Two forms of priming were tested: target location facilitation (i.e. faster reaction times - RTswhen the trial n target is presented at a trial n-1 target relative to n-1 blank location) and distractor location inhibition (i.e. slower RTs for n targets presented at n-1 distractor compared to n-1 blank locations). It was found that target locations were coded in positional short-term memory with reference to both spatiotopic and object-centered representations (Experiment 1 vs. 2). In contrast distractor locations were maintained in an object-centered reference frame (Experiments 1 and 2). We put forward the idea that the uncertainty induced by the experiment manipulation (predictable versus random cross-trial item displacements) modulates the transition from object- to space-based representations in cross-trial memory for target positions.
Citation Count: 1
Duygu Yüklü Kelimelerin İşlenmesinde Konfigürasyon Temelli Temsiller
(2020) Memiş, Elif; Güney, Çiçek; Gökçe, Ahu
Duyguların bilişsel süreçlere etkisi son yıllarda sıklıkla çalışılan bir konuolmuştur. Bu çalışmada duyguların görsel-mekansal dikkat süreci ileilişkisinin incelenmesi amaçlanmıştır. Bireylerin görsel-mekansal dikkatsüreçleri, konfigürasyon oluşturan kelimelerin lokalizasyon görevi sırasındaişlenmesi yoluyla incelenmiştir. Lokalizasyon görevinde katılımcılardangördükleri fiksasyon işaretinin (‘+’) rengi ile aynı renkte yazılı olan kelimeninkonfigürasyondaki yerini klavyede önceden belirlenen tuşa basarak belirtmeleriistenmiştir. Her denemede, farklı renklerde dört kelime, bir kare konfigürasyonuoluşturacak şekilde konumlandırılmıştır. Farklı deney koşullarında karekonfigürasyonu oluşturan kelimeler duygusal değerlikte (nötr, pozitif venegatif kelimeler) farklılık göstermiştir. Denemeler arası geçişlerde (deneme1  deneme 2) hedef uyaranın konfigürasyondaki yeri (örn., sağ üst köşe),konfigürasyonun büyüklüğü (büyük ya da küçük kare) ve kelime türü (duyguyüklü, nötr kelime) değişiklik göstermiştir. Bu çalışmanın temel amacı,duygu yüklü ve nötr kelimelerin işlenmesi sürecinde etkili olan değişkenlerarasındaki etkileşimi incelemektir. Bu değişkenler, dikkatin yönlendirildiğialanın boyutu ve denemeler arasında tekrarlanan ya da değişen hedef uyarankonum tespitidir. Kare konfigürasyonun denemeler arasında büyük ya da küçükolması dikkatin yönlendirildiği alanın boyutunu belirlemektedir. Sonuçlarkullanılan kelime türünün ve konfigürasyon boyutunun lokalizasyon göreviperformansında farklılığa yol açtığını göstermektedir. Nötr ve negatif kelimelerkullanıldığında hedef uyaran lokasyonun denemeler arasında tekrarlanmasınıntepki süresinin uzamasına sebep olduğu bulunmuştur. Hedef uyaranın lokasyonufarklı olduğunda ise katılımcıların tepki süresinin kısaldığı, yani kelimeninişlenmesinin daha kolay olduğu gösterilmiştir. Ayrıca, yalnızca duygu yüklükelimeler kullanıldığında büyük konfigürasyonların küçük konfigürasyonlaragöre daha iyi bir performansa yol açtığı gözlemlenmiştir. Çalışma kapsamındaelde edilen bulgular, kelime uyaranlarının kullanımı ile konfigürasyonlarınotomatik olarak oluştuğunu ve duygu yüklü ve nötr kelimelerin farklı şekildeişlenmesinde etkisi olduğunu göstermektedir.
Citation Count: 0
Visual Processing of Food Stimuli: the Impact of Working Memory Load and Color
(Springer, 2023) Gurbuz, Emre; Gokce, Ahu
Our environment is surrounded by appetizing food stimuli that contribute to an increase in health problems such as obesity and overweight. Understanding the cognitive factors underlying the processing of food stimuli can play an important role in health interventions. Recent studies showed that high-calorie food stimuli impair working memory (WM) task performance, and some individuals, such as restrained eaters, are more susceptible to this WM performance decrement. The present study investigated the effect of low and high WM load on the processing of food stimuli in restrained and unrestrained eaters. Using an n-back task, identical food (low and high calorie) and non-food (object) stimuli were presented in colored (Experiment 1A) or in grayscale (Experiment 1B) versions. Performance was assessed by reaction time (RT), d-prime, and response bias C variables. Results revealed differences in the different WM load conditions. While no effects were observed in the low load, higher WM load impaired task performance. Processing the food stimuli, compared to objects, led to longer RTs and decreased task performance, indicated by d prime and response bias, only when the stimuli were presented in color but not in grayscale. Though no difference was observed in restrained and unrestrained eaters, the role of WM load on the visual processing of the food stimuli remains to be further examined.
Citation Count: 0
Emotional Word Processing Within Configural Representations
(ISTANBUL UNIV, 2020) Memiş, Elif; Güney, Çiçek; Gökçe, Ahu
The impact of emotions on cognitive processes has been studied intensively in the last years. The aim of the present study is to investigate the relationship between visuospatial attention processes and emotions. Visuospatial attention processes were investigated by using a localization task which required processing of the words that formed the configuration. In the localization task, participants were asked to indicate the position of the target word which matched the color of the fixation cross ("+") by pressing the relevant keyboard button. In each trial, four words in different colors were positioned to form a square configuration. In different experimental conditions, words that formed the configuration varied in their valence (neutral, positive and negative words). The intertrial transitions (trial 1 -> trial 2) consisted of changes in the target's location within the configuration (e.g. top right corner), size of configuration (big/small square) and type of word (emotional/neutral). The main goal of the present study is to investigate the interaction between the processing of emotional and neutral words and certain variables. The variables were the size of the attended area and localizing the target word that was repeated or changed across trials. By changing the size of the configuration (small / big sized square) across trials, the size of the attended area was determined. The results revealed that changes in word valence and size of the configuration led to differences in the localization task performance. It was found that neutral and negative words led to target location repetition cost. Different location targets were processed faster suggesting that word processing was easier. Additionally, bigger, compared to smaller configurations, led to better performance only when emotional words were used. Overall findings of the present study suggest that configural representations are formed automatically by using the word stimuli, and they influence the processing of emotional and neutral words differently.