Psikoloji Bölümü Yayın Koleksiyonu

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Browsing Psikoloji Bölümü Yayın Koleksiyonu by Author "276238"

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    Citation Count: Yazıhan, Nakşidil. "Dikkat eksikliği ve hiperaktivite bozukluğu. Ruh Sağlığı Çalışanları, Alan Uzmanları, Öğrenciler ve Aileler İçin Kuramdan Uygulamaya/Dikkat eksikliği hiperaktivite bozukluğunda görülen uyku bozuklukları", Ankara: Nobel Akademik Kitabevi, 2019.
    Dikkat eksikliği hiperaktivite bozukluğunda görülen uyku bozuklukları
    (2019) Yazıhan, Nakşidil; 276238; Çankaya Üniversitesi, Fen Edebiyat Fakültesi, Psikoloji Bölümü
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    Citation Count: Torun Yazıhan, Nakşidil (2020). "Does a correlation exist between fluid intelligence and creativity?", Cyprus Turkish Journal of Psychiatry & Psychology, Vol. 2, No. 1, pp. 28-34.
    Does a correlation exist between fluid intelligence and creativity?
    (2020) Torun Yazıhan, Nakşidil; 276238; Çankaya Üniversitesi, Fen Edebiyat Fakültesi, Psikoloji Bölümü
    The 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.
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    Citation Count: Torun Yazıhan, N. (2019). "Does A Correlation Exist Between Fluid Intelligence And Creativity?", Cyprus Turkish Journal of Psychiatry & Psychology, Vol.2, No.1, pp.28-34.
    Does A Correlation Exist Between Fluid Intelligence And Creativity?
    (2019) Torun Yazıhan, Nakşidil; 276238; Çankaya Üniversitesi, Fen-Edebiyat Fakültesi, Matematik Bölümü
    The 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.
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    Citation Count: Yazıhan Torun, Nakşidil; Çınar, Orhan; Canbaz, Hayri...[at all], "Metacognitive beliefs and coping strategies of Suicide Attempters", Psychiatry and Behavioral Sciences, Vol. 9, No. 1-2, pp. 34-40, (2019).
    Metacognitive beliefs and coping strategies of Suicide Attempters
    (2019) Yazıhan Torun, Nakşidil; Çınar, Orhan; Canbaz, Hayri; Ak, Mehmet; 276238; Çankaya Üniversitesi, Fen - Edebiyat Fakültesi, Psikoloji Bölümü
    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
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    Citation Count: Yazıhan, Nakşidil; Yelboğa, Zekeriya (2019). "Metacognitive beliefs of posttraumatic stress disorder patients", Klinik Psikiyatri Dergisi-Turkish Journal of Clinical Psychiatry, Vol. 22, No. 4, pp. 445-451.
    Metacognitive beliefs of posttraumatic stress disorder patients
    (2019) Yazıhan, Nakşidil; Yelboğa, Zekeriya; 276238; Çankaya Üniversitesi, Fen Edebiyat Fakültesi, Psikoloji Bölümü
    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.
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    Citation Count: Düzenli Öztürk, Seren; Torun, Nakşidil. "Siber Biliş ve Siber Psikolojide Bilişsel Araştırmalar", in Siber Psikoloji, Nobel Yayın Dağıtım, 2021, pp.140-160.
    Siber Biliş ve Siber Psikolojide Bilişsel Araştırmalar
    (Nobel Yayın Dağıtım, 2021) Düzenli Öztürk, Seren; Torun, Nakşidil; 276238; Çankaya Üniversitesi, Fen - Edebiyat Fakültesi, Psikoloji Bölümü
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    Citation Count: Torun Yazıhan, Nakşidil; Yetkin, Sinan (2019). "Sleep spindle-related electroencephalograph activity of young adults and its relation to cognitive functions", Neurological Sciences and Neurophysiology, Vol. 36, No. 4, pp. 208-214.
    Sleep spindle-related electroencephalograph activity of young adults and its relation to cognitive functions
    (2019-12) Torun Yazıhan, Nakşidil; Yetkin, Sinan; 276238; Çankaya Üniversitesi, Fen Edebiyat Fakültesi, Psikoloji Bölümü
    Objective: 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.
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    Citation Count: Yazihan, Naksidil Torun; Yetkin, Sinan, "Sleep spindle-related electroencephalograph activity of young adults and its relation to cognitive functions", Neurological Sciences and Neurophysiology, Vol. 36, No. 4, pp. 2018-214, (2019).
    Sleep spindle-related electroencephalograph activity of young adults and its relation to cognitive functionsc
    (Ege Univ., 2019-12) Torun Yazıhan, Nakşidil; Yetkin, Sinan; 276238; Çankaya Üniversitesi, Fen - Edebiyat Fakültesi, Psikoloji Bölümü
    Objective: 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.
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    Citation Count: Yazıhan, Nakşidil Torun; Yetkin, Sinan (2020). "Sleep, sleep spindles, and cognitive functions in drug-naive patients with first-episode psychosis", JOURNAL OF CLINICAL SLEEP MEDICINE, Vol. 16, No. 12, pp. 2079-2087.
    Sleep, sleep spindles, and cognitive functions in drug-naive patients with first-episode psychosis
    (2020-12-15) Yazıhan, Nakşidil Torun; Yetkin, Sinan; 276238; Çankaya Üniversitesi, Fen - Edebiyat Fakültesi, Psikoloji Bölümü
    Study 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.
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    Citation Count: Yazihan, Naksidil Torun; Yetkin, Sinan (2018). The Relationship Between Sleep and Declarative Memory, Journal of Turkish Sleep Medicine-Turk Uyku Tbb Dergisi, 5(2), 54-57.
    The Relationship Between Sleep and Declarative Memory
    (Galenos Yayıncılık, 2018-06) Yazıhan, Nakşidil Torun; Yetkin, Sinan; 276238; Çankaya Üniversitesi, Fen - Edebiyat Fakültesi, Psikoloji Bölümü
    Sleep 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.
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    Citation Count: Torun Yazıhan, Nakşidil. "Uyku iğcikleri ve klinik yansımaları", Bilişsel Sinirbilim, Türkiye Klinikleri; 2021. p.39-47.
    Uyku İğcikleri ve Klinik Yansımaları
    (Türkiye Klinikler, 2021) Torun Yazıhan, Nakşidil; 276238; Çankaya Üniversitesi, Fen - Edebiyat Fakültesi, Psikoloji Bölümü
    Uyku çalışmalarında yapılan ölçümler iki temel düzeyde yürütülmektedir. Uykunun süre, yüzde, latans, uyanıklık, etkinlik gibi özelliklerini içeren makro düzey ve her bir döneme özgü kaydedilen beyin osilasyonlarına ilişkin sıklık, süre, latans, yoğunluk, güç gibi özelliklerini içeren mikro düzey. Bu alanda yapılan araştırmalar bize, uyku ile ilişkili farklı düzeylerdeki bu değişkenlerin beyin yapı ve işlevleri ile ilişkisi hakkında bilgi vermektedir. Uykuya ilişkin değişkenlerde gözlenen anormallikler ise, çeşitli psikopatolojilerin gelişim mekanizmaları hakkında bize yeni bilgiler sunmakta, bazı bozukluklar için biyolojik gösterge olarak düşünülüp incelenmekte, bunların tedavileri için yeni yaklaşımlar ortaya koymak amacıyla mercek altına yatırılmaktadır. Son yıllarda üzerinde durulan, uykunun mikrograf elemanlarından bir tanesi olan uyku iğcikleri bu bağlamda ümit vaat etmektedir. Bu yazıda, uyku iğciklerinin özellikleri ve işlevleri çeşitli boyutlarıyla anlatılarak hangi bozukluklarda değişikliğe uğradığı, hangilerinde biyolojik gösterge olarak önerildiği tartışılmaktadır. Makalede, ayrıca, uyku iğciği aktivitesinin otizm açılımı kapsamında bozukluk (OAKB), Alzheimer hastalığı, şizofreni, travma sonrası stres bozukluğu (TSSB) ve insomniadaki elektrofizyolojik değişimleri hakkında bilgi verilmektedir.
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    Citation Count: Torun Yazıhan, Nakşidil; Yetkin, Sinan, "Uyku ve Açık Bellek Arasındaki İlişki", Journal of Turkish Sleep Medicine, Vol. 5, No. 2, pp. 54+, (2018).
    Uyku ve Açık Bellek Arasındaki İlişki
    (Galenos Yayınevi, 2018) Torun Yazıhan, Nakşidil; Yetkin, Sinan; 276238; Çankaya Üniversitesi, Fen - Edebiyat Fakültesi, Psikoloji Bölümü
    Uyku 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.