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Yıl:2022; Cilt: 10; Sayı: 25>> Özet
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Nesne Psikoloji Dergisi; 2022;10(25):507-522
Mekânsal Dikkat Süreçlerinde Semantik ve Sembolik İpuçlama Etkileri
A Gökçe
Kadir Has Üniversitesi, İstanbul
Görsel tarama görevlerinde denemeler arasında hedef uyaran özelliklerinin tekrarlanması veya değişmesi performansı farklı etkilemektedir. Bu çalışmada hedef uyaranın pozisyonu farklı koşullarda denemeler arasında (deneme n  deneme n+1) değişimlemeye uğrayarak önceki denemede yer alan hedef uyaran, çeldirici uyaran pozisyonunda ya da nötr/boş bir pozisyonda konumlanmıştır. Hedef uyaranın uyaran setindeki pozisyonunun önceki deneme ile aynı olması hedef uyaranın tespitini boş pozisyona kıyasla kolaylaştırmaktadır ve kolaylaştırıcı hazırlama etkisi olarak adlandırılır. Hedef uyaranın uyaran setindeki pozisyonunun önceki denemedeki çeldirici uyaran pozisyonunda olması ise boş pozisyona kıyasla hedef uyaranın tespitini zorlaştırarak performansta zayıflığa yol açmaktadır ve ketleyici hazırlama etkisi olarak adlandırılır (Maljkovic ve Nakayama, 1996). Bu çalışmanın amacı, mekânsal dikkat süreçlerini incelemeyi mümkün kılan pozisyona bağlı kolaylaştırıcı ve ketleyici hazırlama etkilerinin sembolik, kelime ve nötr ipucu uyaranlarının yer aldığı koşullarda ne tür bir değişikliğe uğradığını incelemektir. Uyaran setinden önce sembolik, semantik ya da nötr ipucu uyaranlarından biri gösterilmiştir. İpucu uyaranları, uyaran setinde bulunan hedef uyaranın bulunduğu noktayı ya da çeldirici uyaranlardan birinin bulunduğu noktayı işaret etmiştir. İpucu uyaranının işaret ettiği nokta hedef uyaranın bulunduğu nokta olduğunda geçerli ipucu; çeldirici uyaranlardan birinin yer aldığı nokta olduğunda ise geçersiz ipucu koşulu ortaya çıkmıştır. Deney görevi performansı farklı ipucu türleri ve ipucu geçerliliği koşullarında tepki süresi bağımlı değişkeni temelinde incelenmiştir. Bulgular, ipucu geçerliliği ve ipucu türü değişkenlerinin kolaylaştırıcı ve ketleyici hazırlama etkilerinde farklılıklar olduğunu göstermiştir. Önceki çalışmalarda bir arada incelenmeyen bu faktörlere ait bulgular, mekânsal dikkat süreçlerine dair alan yazına katkı sağlama potansiyeli taşımaktadır.
Semantic and Symbolic Cueing Effects on the Spatial Attenion Processes
In a given visual search task, repetition or switch of the target features affect the task performance differently. In the current study, the position of the target is manipulated across trials (trial n ? trial n+1) and the target could appear at previous target, distractor or empty /neutral position. Positioning the target at the same position as in the previous trial, compared to neutral position, facilitates the target detection process, known as facilitatory priming effect. Positioning the target at previous distractor location, compared to neutral position, impairs the target detection process, known as inhibitory priming effect. The aim of the present study is to investigate modulations in the facilitatory and inhibitory priming effects,which are related to spatial attention processes, in the presence of different cue types (symbolic, semantic, neutral cues). One of the symbolic, semantic or neutral cues was presented prior to the display onset. The spatial cue could either indicate the location of the target or the distractor item. The cue pointing the target’s location generated the valid cue condition and the cue pointing one of the distractors’ location generated the invalid cue condition. Task performance was assessed by the reaction time dependent variable for the different cue types and cue validty conditions. The results revealed that cue validity and cue type factors affected the facilitatory and inhibitory priming effects differently. As the current study is the first one to investigate these factors, the findings have the potential to deepen the knowledge on spatial attention processes.

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