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Yıl:2021; Cilt: 58; Sayı: 3>> Özet
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Nöropsikiyatri Arşivi; 2021;58(3):242-248
Simon Görevi Sırasında Tepki Dinamiklerinin Fare Takibi Yöntemiyle İncelenmesi
HB İkizoğlu, MP Çakır
Orta Doğu Teknik Üniversitesi, Ankara
Amaç: Nöropsikolojide bilişsel süreçleri incelemek için kullanılan çıkarma ve eklemeli etken yöntemlerine dayalı reaksiyon süresi analizleri bilişin dinamik doğasını yeterince dikkate almadığı için eleştirilmektedir. Bu eksikliğe hitaben geliştirilen fare izleme yöntemi, katılımcıların fare hareketlerini kaydederek motor tepki dinamiklerinin incelenmesine olanak vermektedir. Bu çalışmada Simon görevi bağlamında uyaran- tepki uyumluluk etkisi üzerine bir fare izleme çalışması geliştirilerek karar süreci dinamiklerine yönelik ne tür bilgiler elde edilebileceği incelenmiştir. Yöntem: Çalışma kapsamında klasik Simon görevi fare izleme deney ortamına uyarlanmıştır. İlk iki deneyde karar seçeneklerinin üst veya alt köşelere yerleştirildiği durumların fare hareketleri üzerindeki etkisi incelenmiştir. Ayrıca, katılımcıların deneyin ilk yarısında belirli bir yön- renk ilişkisine adapte olduğu ve deneyin ikinci yarısında bu ilişkinin tersine çevrildiği bir tersine Simon deneyi gerçekleştirilmiştir. Bulgular: Deneyler sırasında literatüre uyumlu olarak anlamlı düzeyde uyaran-tepki uyumluluk etkisi gözlenmiştir. Uyaran-tepki uyumu olan ve olmayan durumların fare ölçütleri arasındaki farklılaşmaya ait etki boyutlarının tepki süresine kıyasla daha büyük olduğu gözlenmiştir. Uyumsuz durumlarda sol ve sağ köşelere verilen ortalama fare yanıtlarının asimetrik olduğu gözlenmiştir. Ayrıca, karar seçeneklerinin yerinin yukarıdan aşağı alınmasının uyumsuz koşulda sol ve sağ tarafa verilen fare yanıtları arasındaki asimetrinin artmasına neden olduğu gözlenmiştir. Son olarak, yeni renk-tepki eşleşmesine uyum sağlanmasını gerektiren tersine Simon görevi sırasında adaptasyon sürecinde en belirgin etkinin y-eksenindeki dönüş sayısında gerçekleştiği gözlenmiştir. Sonuç: Fare izleme yöntemiyle karar verme süreçlerinin dinamik yapısının tepki zamanı ölçümlerine kıyasla daha hassas düzeyde incelenebildiği, ancak seçeneklerin ve başlangıç noktasının ekranda konumlandırılma biçimlerinin tepki dinamikleri üzerinde bazı etkileri olabileceği gözlenmiştir.
Investigation of Response Dynamics in the Simon Task with Mouse Tracking Methodology
Introduction: Despite their popularity in Neuropsychology, reaction time analysis based on the subtraction and additive factors methods is critiqued for not paying adequate attention to the dynamical nature of cognition. Mouse-tracking methods aim to cater to this need by allowing researchers to explore response dynamics during cognitive tasks by recording mouse trajectories. Methods: A mouse-tracking adaptation of the Simon task is developed to explore decision-making dynamics in different stimulus-response compatibility conditions. The study focuses on the effects of stimulus design decisions on mouse trajectories, including relocation of the choice buttons from the top corners to the bottom and the mid-session reversal of stimulus-response mapping on mouse responses. Results: Consistent with previous studies, significant stimulus- response compatibility effects were observed, where contrasts over mouse-tracking measures had larger effect sizes than simple reaction time contrasts. Moreover, in the conflict trials, asymmetric response trajectories towards the left and right corners were observed. Moving the response buttons from top to bottom increased the degree of asymmetry between the mouse trajectories towards the bottom-left and bottom-right corners during the conflict condition. Finally, in the reverse Simon task, the switch to a new color-response mapping inflicted the largest effect on the average number of y-flips. Conclusion: Mouse tracking provides measures suitable for exploring decision-making dynamics beyond classical reaction time analysis, provided asymmetries due to the starting position and response layout are considered during experiment design.

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