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Yıl:2001; Cilt: 16; Sayı: 48>> Özet
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Türk Psikoloji Dergisi; 2001;16(48):57-68
Keşif Etkisi: Yüzlerin Tanınmasında Test Koşullarının Etkisi
AI Tekcan, ZF Peynircioglu
Boğaziçi Üniversitesi, İstanbul
Keşif etkisi, bir tanıma testinde tanıma kararırım verilmesinden önce test maddeleri üzerinde herhangi bir işlem yapılması sonucunda ortaya çıkan bellek yanılgısına verilen isimdir. Bu çalışmada, keşif etkisinin insan yüzlerini tanıma performansım etkileyip etkilemeyeceği araştırılmıştır. İnsan yüzlerinin test aşamasında değişik açılarda çevrilmiş olarak sunulmasının tanıma performansına olan olumsuz etkisinin, bu yüzlerin tanıma kararı verilmeden önce tekrar normal olarak sunulması ile ne derece giderilebildiği incelenmiştir: Birinci deneyde, insan yüzü fotoğraflarının test aşamasında çevrilerek sunulması tanıma performansını, daha önceki literatür ışığında beklendiği gibi, olumsuz yönde etkilemiştir. İkinci deneyde, denekler birinci deneydeki gibi çevrilmiş olarak sunulan fotoğraflar için bir tanıma kararı verdikten sonra aynı fotoğrafların normal hale çevrilmesinden sonra ikinci bir tanıma kararı daha vermişlerdir. Bu durumda, tanıma performansı artmış, ancak keşif etkisine işaret eden bir bulgu ortaya çıkmamıştır. Üçüncü deneyde, denekler sadece çevrilmiş olan fotoğraflar normal olarak sunulduktan sonra kararlarını vermişlerdir. Bu deneyin sonucuna, başlangıçta çevrili olarak sunulan hem eski hem de yeni fotoğraflar için "eski" kararı verme olasılığı artmış ve keşif etkisi ortaya çıkmıştır. İkinci deneyin sonuçları kodlamanın özgüllüğü ilkesi vb. yaklaşımlar ile uyum gösterirken, üçüncü deney, keşif etkisinin sözel olmayan materyaller için de geçerli olan bir bellek yanılması olduğunu göstermiştir.
Revelation Effect: Effects of test conditions on face recognition
Revelation effect refers to a bias in recognition memory where people are more likely to judge items as ‘old’ if they were distorted and then had to be revealed before a recognition decision is made. We explored this effect with human face recognition. More specifically, we investigated whether the detrimental effects of rotation on face recognition could be countered by reinstating the faces to their upright positions and whether such reinstatement would also cause a revelation effect. In Experiment 1, rotated faces in the test caused recognition accuracy to decline. In Experiment 2, participants made a second recognition decision after each face was brought to its upright position, and although accuracy improved, no revelation effect emerged. In Experiment 3, participants made the recognition decision only after the faces were brought to an upright position; initially rotated faces were more Likely to be judged as old than were initially upright faces. Thus, although reinstating the orientation of faces increased accuracy, it also led to a revelation effect in the nonverbal domain.

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