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Yıl:2011; Cilt: 26; Sayı: 68>> Özet
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Türk Psikoloji Dergisi; 2011;26(68):104-120
Renk-Şekil Boyutu Değiştirme ve Ayırt Etme Süreçlerinin Planlamaya Etkisi
S Cinan, P Ünsal
İstanbul Üniversitesi, İstanbul
Mevcut çalışmada iki boyutlu (renk-şekil) veya tek boyutlu (renk) boncuklardan oluşan farklı hedef örüntüleri olan, ama aynı hareketlerin ardışık sırayla yapılmasıyla çözülebilen planlama problemleri tasarlanmıştır ve Londra Kulesi Testinde (LKT) planlı hareketler yürütülürken kullanılan boncukların algısal özelliklerinin performansa etkisi araştırılmıştır. İki boyutlu LKT (2B-LKT), her iki problemde bir boyut değiştirerek (renkten şekle, şekilden renge geçerek) problemlerin çözülmesini gerektirmiştir. Çatışma Kulesi Testi (ÇKT) ise renkleri farklı ama aynı şekle sahip (ikisi yuvarlak, ikisi küp) yine iki boyutlu boncukları içermiştir ve katılımcılar her bir problemi boncukların ikisini şekline, kalan ikisini rengine göre hedefl e eşleyerek çözmüştür. Dolayısıyla bu test her bir problemin çözümünde boncukların renk-şekil özelliklerinin ayırt edilmesini gerektirmiştir. Tek boyutlu (renk) LKT ile yapılan karşılaştırmalar planlama performansının renk-şekil boyutu değiştirme ve ayırt etme süreçlerinden etkilendiğine işaret etmiştir. Ayrıca, aynı problemin 4 kere üst üste çözülmesini gerektiren şartlarda renk ve şekil boyutları arasında bir geçiş yapması istenmeyen kontrol grubuyla, iki kere problemi bir boyuta (renk) göre çözdükten sonra diğer boyuta (şekil) geçerek iki kere daha çözen renk-şekil boyut değiştirme grubunun performansları eğilim (trend) analizi kullanılarak incelenmiştir. Analiz sonuçları, kontrol grubunun performansında doğrusal bir eğilimin olduğunu; buna karşılık renk-şekil boyut değiştirme grubunun performansında, boyut değiştirmenin etkisiyle, karesel ve kübik eğilim izlendiğini göstermiştir
Effects of Mental Shiftand Stimulus Discrimination on Planning
The present study examined effects of perceptual features of the Tower of London (TOL) Test on planning performance by means of manipulating visual properties of the beads used to make planned movements. The same planning problems were used in three different versions of the TOL. That is, they were solved by exactly the same successive moves but each version had different target confi gurations that consisted of two dimensional (color and shape) or one dimensional (color) beads. In the two-dimensional TOL (2D-TOL test), the planning problems were solved according to either color or shape dimensions of four beads, whereas in the Tower of Confl ict Test (TOC), participants were required to discriminate their four beads as two beads to be matched in shape and two in color to a problem configuration. The results revealed that performance on the TOL with one-dimensional beads signifi cantly differed from those on the TOC and the 2D-TOL indicating that planning and execution of movements were infl uenced by mental shifts between two dimensions (color and shape) of the beads and stimulus discrimination processes. In addition, same problem was solved 4 times in succession by a control group, who did not shift between the two dimensions and by a mental shift group, who were required to shift to the other dimension after solving a problem two times in succession, and trend analyses were used to examine changes due to mental shift. Polynomial contrasts revealed only a significant linear trend for the control group, while quadratic and cubic trends were observed across the repeated measures of same planning problem for the mental shift group

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