Yazıhan, Nakşidil
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Torun Yazıhan, Nakşidil
Yazıhan, Nakşidil
Yazihan, Naksidil Torun
Torun, Nakşidil
Yazihan, N.T.
Yazihan, N. Torun
Yazihan, N.
Yazihan, Naksidil
Yazıhan, Nakşidil
Yazihan, Naksidil Torun
Torun, Nakşidil
Yazihan, N.T.
Yazihan, N. Torun
Yazihan, N.
Yazihan, Naksidil
Job Title
Dr. Öğr. Üyesi
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Main Affiliation
02.04. Psikoloji
Psikoloji
02. Fen-Edebiyat Fakültesi
01. Çankaya Üniversitesi
Psikoloji
02. Fen-Edebiyat Fakültesi
01. Çankaya Üniversitesi
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Former Staff
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Sustainable Development Goals
13
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0
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8
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3
GOOD HEALTH AND WELL-BEING
1
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15
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17
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14
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4
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11
SUSTAINABLE CITIES AND COMMUNITIES
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6
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10
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9
INDUSTRY, INNOVATION AND INFRASTRUCTURE
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12
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2
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1
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7
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5
GENDER EQUALITY
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16
PEACE, JUSTICE AND STRONG INSTITUTIONS
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This researcher does not have a Scopus ID.
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Scholarly Output
16
Articles
12
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3340/4720
Supervised MSc Theses
0
Supervised PhD Theses
0
WoS Citation Count
24
Scopus Citation Count
14
WoS h-index
2
Scopus h-index
1
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0
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WoS Citations per Publication
1.50
Scopus Citations per Publication
0.88
Open Access Source
11
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0
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| 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 |
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16 results
Scholarly Output Search Results
Now showing 1 - 10 of 16
Article 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 Sleep spindle-related electroencephalograph activity of young adults and its relation to cognitive functions(2019) Torun Yazıhan, Nakşidil; 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.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 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 The Relationship Between Sleep and Declarative Memory(Galenos Publ House, 2018) Yazihan, Naksidil Torun; Yetkin, SinanSleep is a physiologically active process and the function of cognitive processes is known for a long time. It is also known that sleep has a crucial role in two distinct phases of memory. The first one is the information encoding phase which is prior to the learning process; and the second one is the consolidation phase which is related with the persistency of new information after learning occurs. Consolidation is thought as a function of evolutionarily preserved sleep for many forms of memory. The aim of this review is to get together the main study findings which investigating the relationship between the micro and macro structures of sleep and declarative memory processes. Firstly, definition of sleep is given, and then the specific role of sleep in declarative memory consolidation process is explained. In this context, the projected active system consolidation and synaptic homeostasis hypothesis are explicated. The study results investigating the effects of sleep deprivation on declarative memory and information processing phases are summarized. Finally, the role of sleep spindle and slow wave activity on memory processes, which make up the microstructure of sleep, is discussed.Article Does a correlation exist between fluid intelligence and creativity?(2020) Torun Yazıhan, NakşidilThe aim of the study was to investigate the associations between fluid intelligence and creativity among young adults. The sample consisted of 26 university students who were recruited through convenience sampling method. The Raven Standard Progressive Matrices (RSPM) 9 item-form and a divergent thinking test were used to measure fluent intelligence and creativity, respectively. In order to examine the associations between creativity and fluent intelligence correlational analysis was applied. The Pearson’s correlation coefficient revealed that there was no significant relationship between the tests of divergent thinking and RSPM total score. On the other hand, the results showed a significant positive correlation between the RSPM visuospatial factor and both fluency (r=.47, p<.01) and flexibility (r=.41, p<.01) dimensions of the divergent thinking test. As a result, we suggest that certain basic processes regarding fluid intelligence (e.g. visual spatial reasoning) and creativity operate through common and similar mechanisms. Future studies could investigate the association between these constructs by using neuro-imagining method and focus on how these skills can be integrated into real life situations.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: 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.Article Citation - WoS: 8Metacognitive Beliefs and Coping Strategies of Suicide Attempters(Yerkure Tanitim & Yayincilik Hizmetleri A S, 2019) Yazihan, Naksidil Torun; Cinar, Orhan; Canbaz, Hayri; Ak, MehmetObjective: Metacognition is an essential process regarding decision-making and coping with stressful life events. In this present study, we aimed to examine the metacognitive beliefs and coping strategies of suicide attempters with subthreshold depressive symptoms. Methods: Thirty suicide attempters (mean age of 25.50 +/- 7.66 years) with subthreshold depressive symptoms and 30 healthy participants (mean age of 28.27 +/- 7.13 years) were compared with regard to Metacognition Questionnaire-30 (MCQ-30) and COPE Questionnaire. Results: The MANOVA results revealed significant differences between the groups for the subscales of MCQ-30 namely, "negative beliefs about thoughts", "need to control thoughts" and "lack of cognitive confidence". The results also indicated significant difference regarding "positive reinterpretation", "seeking social support for instrumental reasons", "active coping, planning, and problem-focused coping", "behavioral disengagement", "alcohol-drug disengagement" and "dysfunctional coping" subscales of COPE Questionnaire. In addition, moderate correlations were found between the MCQ-30 and the COPE subscales based on the Pearson's correlation coefficients. Conclusions: This study revealed the effect of particular metacognitive beliefs and type of coping style on suicidal behavior. This study is important for identifying risk factors and explaining how metacognitive beliefs and coping strategies are related to suicidal behavior. Maladaptive metacognitions may lead to overestimation of perceived stress and underestimation of cognitive resources and coping skills which may prevent individulas to produce adaptive coping strategies against stressful life events.
