Yazıhan, Nakşidil
Loading...
Profile URL
Name Variants
Torun Yazıhan, Nakşidil & Yazıhan, Nakşidil & Yazihan, Naksidil Torun & Torun, Nakşidil & Yazihan, N.T. & Yazihan, N. Torun & Yazihan, N. & Yazihan, Naksidil
Job Title
Dr. Öğr. Üyesi
Email Address
Main Affiliation
02.04. Psikoloji
Psikoloji
02. Fen-Edebiyat Fakültesi
01. Çankaya Üniversitesi
Psikoloji
02. Fen-Edebiyat Fakültesi
01. Çankaya Üniversitesi
Status
Former Staff
Website
ORCID ID
Scopus Author ID
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
Sustainable Development Goals
1NO POVERTY
0
Research Products
2ZERO HUNGER
0
Research Products
3GOOD HEALTH AND WELL-BEING
1
Research Products
4QUALITY EDUCATION
0
Research Products
5GENDER EQUALITY
0
Research Products
6CLEAN WATER AND SANITATION
0
Research Products
7AFFORDABLE AND CLEAN ENERGY
0
Research Products
8DECENT WORK AND ECONOMIC GROWTH
0
Research Products
9INDUSTRY, INNOVATION AND INFRASTRUCTURE
0
Research Products
10REDUCED INEQUALITIES
0
Research Products
11SUSTAINABLE CITIES AND COMMUNITIES
0
Research Products
12RESPONSIBLE CONSUMPTION AND PRODUCTION
0
Research Products
13CLIMATE ACTION
0
Research Products
14LIFE BELOW WATER
0
Research Products
15LIFE ON LAND
0
Research Products
16PEACE, JUSTICE AND STRONG INSTITUTIONS
0
Research Products
17PARTNERSHIPS FOR THE GOALS
0
Research Products
This researcher does not have a Scopus ID.
This researcher does not have a WoS ID.
No records found in other affiliations.
Scholarly Output
17
Articles
13
Views / Downloads
3362/4762
Supervised MSc Theses
0
Supervised PhD Theses
0
WoS Citation Count
25
Scopus Citation Count
14
Patents
0
Projects
0
WoS Citations per Publication
1.47
Scopus Citations per Publication
0.82
Open Access Source
12
Supervised Theses
0
| Journal | Count |
|---|---|
| Journal of Turkish Sleep Medicine | 3 |
| Neurological Sciences and Neurophysiology | 2 |
| Klinik Psikiyatri Dergisi | 2 |
| Dikkat eksikliği ve hiperaktivite bozukluğu. Ruh Sağlığı Çalışanları, Alan Uzmanları, Öğrenciler ve Aileler İçin Kuramdan Uygulamaya | 1 |
| International Journal of Psychophysiology | 1 |
Current Page: 1 / 3
Scopus Quartile Distribution
Competency Cloud
17 results
Scholarly Output Search Results
Now showing 1 - 10 of 17
Article Uyku ve Açık Bellek Arasındaki İlişki(Galenos Yayınevi, 2018) Torun Yazıhan, Nakşidil; Yetkin, SinanUyku fizyolojik olarak aktif bir süreç olup bilişsel süreçlere ilişkin fonksiyonu uzun zamandır bilinmektedir. Uykunun iki farklı aşamada bellek ile ilişkili olarak kritik olduğu bilinmektedir. Birincisi öğrenme öncesi olan bilginin kodlanması aşaması; ikincisi ise öğrenme gerçekleştikten sonra yeni bilgilerin kalıcılığıyla ilişkili olan konsolidasyon aşamasıdır. Konsolidasyonun belleğin pek çok formu için evrimsel olarak korunmuş uykunun bir fonksiyonu olduğu düşünülmektedir. Bu derleme yazısının amacı uykunun mikro ve makro yapıları ile açık-deklaratif bellek süreçlerinin ilişkisini araştıran başlıca çalışma bulgularını bir araya getirmektir. Öncelikle uyku tanımlanmış, sonrasında uykunun açık bellek konsolidasyonu sürecindeki özgün rolü açıklanmıştır. Bu bağlamda öne sürülen aktif sistem konsolidasyonu ve sinaptik homeostazis hipotezleri anlatılmıştır. Uyku deprivasyonunun açık bellek ve bilgi işleme süreçleri üzerine etkilerini araştıran çalışma sonuçları özetlenmiştir. Son olarak uykunun mikro yapısını oluşturan uyku iğciği ve yavaş dalga aktivitesinin bellek süreçleri üzerindeki rolü tartışılmıştır.Article Citation - WoS: 1Citation - Scopus: 1Sleep Spindle-Related Electroencephalograph Activity of Young Adults and Its Relation To Cognitive Functions(Ege Univ, 2019) Yazihan, Naksidil Torun; Yetkin, SinanObjective: Sleep spindles are phasic bursts of thalamocortical activity, typically defined as 11-16 Hz (in sigma frequency band) with a duration of 0.5 and 2 seconds. Spindles are most prominent during N2 sleep and are a defining feature of this stage. The aim of the present study was to investigate the association between spindle characteristics and cognitive functions of young adults. Methods:The study sample consisted of 17 healthy male subjects aged between 19 and 28 years.The participants had no medical or psychological conditions and were not taking any medications that might affect their sleep pattern and neuropsychological measurements. Polysomnography recordings were conducted from 22:30 to 07:00 hour for two subsequent nights. The first night was for adaptation to the laboratory conditions and to rule out sleep apnea syndrome and periodic leg movements. The second night was used to analyze macro and micro parameters of sleep. A neuropsychological test battery comprising the Serial Digit Learning Test, Raven Standard Progressive Matrices, Verbal Fluency Test,Trail Making A-B, and the Auditory Verbal Learning Test were administered before the second-night sleep session. Sleep spindles in all non-rapid eye movement stage 2 sleep were scored visually from C3-A2 electroencephalogram derivation after polysomnographic analysis was completed. Each 30-sec epoch was analyzed with a high-pass band filtered at 0.3 Hz, and a low-pass band filtered at 35 Hz. Spindle characteristics such as duration, amplitude, mean and peak frequencies were analyzed using the fast Fourier transform algorithm. The association between the characteristics of sleep spindles and the neuropsychological test scores were analyzed using Spearman correlations. Results: Significant positive correlations were found between spindle density and both verbal auditory learning performance and verbal fluency, cognitive flexibility, and semantic organization performances. The serial digit learning test was correlated positively with mean duration, mean frequency, and peak frequency of sleep spindles. Finally, the mean duration, and mean frequency of spindles were positively correlated with verbal fluency, cognitive flexibility, and semantic organization. Conclusion: The associations between spindle features and memory, verbal fluency, and verbal learning abilities were consistent with previous research findings suggesting that sleep spindles might be related to cognitive abilities and the potential to learn. In other words, it might be an indicator of the current level of aptitude for learning.Article Sleep spindle-related electroencephalograph activity of young adults and its relation to cognitive functions(Ege Univ, 2019) Torun Yazıhan, Nakşidil; Yetkin, Sinan; Yazıhan, Nakşidil TorunObjective: Sleep spindles are phasic bursts of thalamocortical activity, typically defined as 11-16 Hz (in sigma frequency band) with a duration of 0.5 and 2 seconds. Spindles are most prominent during N2 sleep and are a defining feature of this stage. The aim of the present study was to investigate the association between spindle characteristics and cognitive functions of young adults. Methods:The study sample consisted of 17 healthy male subjects aged between 19 and 28 years.The participants had no medical or psychological conditions and were not taking any medications that might affect their sleep pattern and neuropsychological measurements. Polysomnography recordings were conducted from 22:30 to 07:00 hour for two subsequent nights. The first night was for adaptation to the laboratory conditions and to rule out sleep apnea syndrome and periodic leg movements. The second night was used to analyze macro and micro parameters of sleep. A neuropsychological test battery comprising the Serial Digit Learning Test, Raven Standard Progressive Matrices, Verbal Fluency Test,Trail Making A-B, and the Auditory Verbal Learning Test were administered before the second-night sleep session. Sleep spindles in all non-rapid eye movement stage 2 sleep were scored visually from C3-A2 electroencephalogram derivation after polysomnographic analysis was completed. Each 30-sec epoch was analyzed with a high-pass band filtered at 0.3 Hz, and a low-pass band filtered at 35 Hz. Spindle characteristics such as duration, amplitude, mean and peak frequencies were analyzed using the fast Fourier transform algorithm. The association between the characteristics of sleep spindles and the neuropsychological test scores were analyzed using Spearman correlations. Results: Significant positive correlations were found between spindle density and both verbal auditory learning performance and verbal fluency, cognitive flexibility, and semantic organization performances. The serial digit learning test was correlated positively with mean duration, mean frequency, and peak frequency of sleep spindles. Finally, the mean duration, and mean frequency of spindles were positively correlated with verbal fluency, cognitive flexibility, and semantic organization. Conclusion: The associations between spindle features and memory, verbal fluency, and verbal learning abilities were consistent with previous research findings suggesting that sleep spindles might be related to cognitive abilities and the potential to learn. In other words, it might be an indicator of the current level of aptitude for learning.Book Part Siber Biliş ve Siber Psikolojide Bilişsel Araştırmalar(Nobel Yayın Dağıtım, 2021) Düzenli Öztürk, Seren; Torun, NakşidilBook Part Dikkat eksikliği hiperaktivite bozukluğunda görülen uyku bozuklukları(2019) Yazıhan, NakşidilArticle Travma Sonrası Stres Bozukluğu Hastalarında Üstbilişlere İlişkin İnançlar(Klinik Psikiyatri dergisi, 2019) Yazihan, Nakidil; Yelboga, ZekeriyaAmaç: Üstbiliş (metacognition) kavramı, bilişleri kontroleden, düzenleyen ve değerlendiren üst düzey bilişselyapı, bilgi ve süreçler olarak tanımlanabilir. Çalışmanınamacı Travma Sonrası Stres Bozukluğu (TSSB)hastalarında hangi üstbiliş süreçlerinin kullanıldığını,üstbilişlerin çeşitli semptomlarla nasıl bir ilişki içindeolduğunu araştırmaktır. Yöntem: Örneklem, 52 TSSBhastası (yaş ortalaması=31,67±6,54) ve 54 sağlıklı (yaşortalaması=29,00±6,61) katılımcıdan oluşmuştur.Üstbiliş süreçlerini değerlendirmek amacıyla Üstbiliş-30ölçeği; semptom taraması yapmak amacıyla RuhsalBelirti Tarama Listesi uygulanmıştır. Bulgular: Elde edilenveriler MANCOVA kullanılarak analiz edilmiştir. Analizsonuçlarına göre üzüntü ve zihinsel ruminasyonlarıntehlikeli, kontrolünün güç ve olumsuz olduğuna ilişkininançları içeren “kontrol edilemezlik ve tehlike”; bazıdüşüncelerin kontrol edilmesi ve bastırılması gerektiğineilişkin inançları içeren “düşünceleri kontrol”; kişininbellek ve dikkat mekanizmalarına olan güvensizliğineilişkin inançları içeren “bilişsel güven” alt boyutlarındaTSSB grubu anlamlı olarak daha yüksek puan almıştır.Buna karşın üzüntü ve ruminasyonun işlevsel olduğunadair maddelerin yer aldığı “olumlu inanç” boyutlarındaise TSSB grubu daha düşük puan almıştır. Sonuç: Travmahastaları üzüntü ve ruminasyonun kendileri için olumsuzsonuçları olduğunu düşünmekte, bazı düşüncelerinintehlikeli olduğu için baskılanması ve kontrol edilmesigerektiğine inanmaktadırlar. Hastalarda başta obsesif,depresif ve psikotik belirtiler olmak üzere tüm semptomlardaki artış patolojik tarzda üstbiliş faaliyetlerininartması şeklinde yansımıştır. Travma hastalarında obsesifdüşünceler, öfke-düşmanlık, kişiler arası duyarlılık belirtileri daha büyük oranda hastaların düşüncelerinin tehlikeli olduğu ve kontrol edilmesi gerektiğine ilişkinüstbilişlerle ilişkili gözükmektedir.Article Travma Sonrasi Stres Bozukluǧu Hastalarinda Üstbilişlere İlişkin İnançlar(ANP Publishing, 2019) Yazihan, N.; Yelboǧa, Z.Objective: The concept of metacognition can be described as metacognitive structures controlling, arranging and assessing the cognitions. The aim of this study was to investigate metacognitive beliefs and their relationship with the psychological symptoms of posttrumatic stress disorder (PTSD) patients. Method: The sample consisted of 52 posttraumatic stress disorder patients (mean age=31,67±6,54) and 54 healthy participants (mean age=29,00±6,61). Metacognitive beliefs were measured through Metacognitive Questionnaire-30 which is accepted as a measuring device of metacognitive beliefs, metacognitive processes and judgment. To describe symptom profiles Symtom Checklist-90 was used. Results: Data were analyzed by using MANCOVA. PTSD group scores were significantly higher than control group for uncontrallability and danger (includes items that worry and rumination are negative, dangerous and difficult to control); need to control thoughts (includes items that some thoughts are need to be controlled and suppressed) and finally lack of "cognitive confidence" (includes items about problems related to memory and attention). On the other hand, positive beliefs about thoughts which involves the items related to the idea that worry and rumination is functional was lower among individuals with PTSD. Discussion: Trauma patients think that worry and rumination have negative consequences, and some thoughts need to be controlled and supressed as they are dangerous. The elevation of clinical symptoms such as obsession, depression and psychotic symptoms were correlated with the increase of abnormal metacognitive belifs. Thoughts are dangerous and need to be controlled, appear to be related to obsesive thoughts, anger and hostility and interpersonal sensitivity sypmtoms. © 2019 ANP Publishing. All rights reserved.Article Citation - WoS: 13Citation - Scopus: 13Sleep, Sleep Spindles, and Cognitive Functions in Drug-Naive Patients With First-Episode Psychosis(Amer Acad Sleep Medicine, 2020) Yazihan, Naksidil Torun; Yetkin, SinanStudy Objectives: Various lines of clinical findings have suggested abnormalities in macro- or microstructural parameters of sleep in patients with schizophrenia. Meanwhile findings are inconclusive due to some confounding factors, such as the heterogeneity of the disorder, drug regimen, and duration of the illness. There are a few studies in the literature that have been conducted on drug-free patients with first-episode psychosis (FEP). Based on this knowledge, we aimed to explore sleep characteristics, sleep spindles, and neuropsychological profiles of the drug-naive patients with FEP. Methods: The study sample consisted of 21 drug-naive patients with FEP and 21 healthy participants. Polysomnography recordings were conducted for 2 subsequent nights. A neuropsychological test battery was administered for assessing cognitive functions. The Positive and Negative Syndrome Scale was applied to measure symptom severity of the patients. Spindle detection was performed visually. Results: According to the results of the study, the patient group's percentage of stage N2 sleep and sleep efficiency index was lower than in the control group. Among sleep spindle parameters, spindle density was found to be reduced in the patient group. The results of neuropsychological tests measuring executive functions, learning, and memory support the idea that there is a global cognitive deterioration from the early course of the disorder. In the psychotic group, negative symptoms were negatively correlated with verbal memory, learning, verbal fluency, and semantic organization. We found that the percentage of stage N3 sleep decreased while negative symptom severity increased. In addition, the percentage of stage N1 sleep increased as negative symptom severity increased. Reduction in stage N3 sleep was associated with an impairment in learning, verbal fluency, and response inhibition. The sleep spindle density and cognitive functions did not show any associations. Conclusions: Taken together, these findings suggest that patients with FEP show global cognitive impairment (except for attention and processing speed), which is associated with changes in sleep architecture and higher score in a scale assessing negative symptoms. We conclude that cognitive function and spindle parameters differ nonlinearly among patients with FEP.Conference Object Relationship Between Sleep Spindle and Cognitive Functions in Young Male Adults(Elsevier, 2018) Yazihan, N. Torun; Yetkin, S.Article Travma Sonrası Stres Bozukluǧu Hastalarında Üstbilişlere İlişkin İnançlar(ANP Publishing, 2020) Yazihan, N.; Yelboǧa, Z.Objective: The concept of metacognition can be described as metacognitive structures controlling, arranging and assessing the cognitions. The aim of this study was to investigate metacognitive beliefs and their relationship with the psychological symptoms of posttrumatic stress disorder (PTSD) patients. Method: The sample consisted of 52 posttraumatic stress disorder patients (mean age=31,67±6,54) and 54 healthy participants (mean age=29,00±6,61). Metacognitive beliefs were measured through Metacognitive Questionnaire-30 which is accepted as a measuring device of metacognitive beliefs, metacognitive processes and judgment. To describe symptom profiles Symtom Checklist-90 was used. Results: Data were analyzed by using MANCOVA. PTSD group scores were significantly higher than control group for uncontrallability and danger (includes items that worry and rumination are negative, dangerous and difficult to control); need to control thoughts (includes items that some thoughts are need to be controlled and suppressed) and finally lack of "cognitive confidence" (includes items about problems related to memory and attention). On the other hand, positive beliefs about thoughts which involves the items related to the idea that worry and rumination is functional was lower among individuals with PTSD. Discussion: Trauma patients think that worry and rumination have negative consequences, and some thoughts need to be controlled and supressed as they are dangerous. The elevation of clinical symptoms such as obsession, depression and psychotic symptoms were correlated with the increase of abnormal metacognitive belifs. Thoughts are dangerous and need to be controlled, appear to be related to obsesive thoughts, anger and hostility and interpersonal sensitivity sypmtoms. © 2020 ANP Publishing. All rights reserved.