Nikotinin dönme yönü tercihi ve uzaysal görsel dikkat üzerine etkisi

Yıl 2012, Cilt: 65 Sayı: 2, 83 - 90, 01.02.2012

Fırat Akat Canan Kalaycıoğlu

https://doi.org/10.1501/Tipfak_0000000814

Öz

Anahtar Kelimeler

-

Nikotinin Dönme Yönü Tercihi ve Uzaysal Görsel Dikkat Üzerine Etkisi

Öz

Bu çalıșmada, genç, yetișkin, sağlıklı, erkeklerde nikotinin dönme yönü tercihi ve dikkat asimetrisine
etkileri araștırılmıștır. Çalıșmaya 18-26 yaș arası, sağlıklı, sağlak, 20 adet sigara içen/20
adet sigara içmeyen 40 erkek gönüllü katılmıștır. Deneklere Dönme Yönü Tercihi Testi ve
Landmark Testi
uygulamıștır. Tüm denekler çalıșmaya iki kere katılmıșlardır. Sigara içen grup bir gelișlerinde,
yoksunluk [yok(+)] durumunda, diğerinde ise normal sigara içme alıșkanlıklarını değiștirmeden
[yok(-)], denemelere katılmıșlardır. Verilerin değerlendirilmesinde, Two-Way ANOVA, Student t,
Paired t, Kruskal Wallis, Wilcoxon ve Mann-Whitney U testleri kullanılmıștır. 0,05’in altında olan
p değeri istatistiksel olarak anlamlı kabul edilmiștir. Araștırmada deneklerin genel olarak soldan
dönme eğilimi gösterdiği ancak bu eğilimin kontrol ve/veya deney grubunun alt grupları arasında
herhangi bir değișim göstermediği bulunmuștur. Landmark Testi’nde deneklerin ortadan
bölünmüș çizgilerdeki yanıtlarına göre asimetri indeksleri hesaplanmıș, dikkat asimetrisinin
yönü ve șiddeti tespit edilmiștir. Tüm denekler için, sol alanda asimetri indeksi en düșük değeri
alırken, bunu orta ve sağ alan izlemiștir. Sol ve orta alanda asimetri indeksi negatif değerler
alırken, sağ alanda pozitif değer almıștır. Alanlar arasındaki fark istatistiksel olarak anlamlı bulunmuștur.
Kontrol grubu, yok(+) ve yok(-) grupları arasında yapılan çoklu analizlerde hiçbir
grup arasında istatistiksel açıdan anlamlı bir fark bulunmamıștır. Araștırmanın tüm bulguları,
nikotinin dönme yönü tercihine ve Landmark Testi sonuçlarına anlamlı bir etki yapmadığı yönündedir. Ayrıca Dönme Yönü Tercihi Testi ile
Landmark Testi sonuçlar arasında bir korelasyon bulunmaması, dikkat asimetrisinin
dopaminerjik asimetriden etkilendiği tezini desteklememektedir.

Anahtar Kelimeler

Serebral Asimetri, Landmark Testi, Nikotin, Dönme Yönü Tercihi

Kaynakça

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