성인 ADHD 경향군의 지각 및 주의 특성을 연구하기 위한 새로운 실험 도구: 쌍안정적 자극의 활용
Bistable Stimuli: A New Experimental Tool for Researching Perception and Attention in Adult ADHD Tendency
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초록
본 연구는 성인 ADHD 경향군의 주의 통제 및 히스테리시스 특성을 연구하는데 있어 쌍안정적 자극의 활용 가능성을 고찰하고자 하였다. 연구 1에서 쌍안정적 회전 원통체를 활용하여 지각 전환 및 지각 유지 수행에 ADHD 경향군과 통제군 간의 차이가 유의미한지 확인하고자 하였다. 연구 1의 결과 선호 방향에 따른 지각 전환의 집단 간 차이가 유의미하지 않았으나 성인 ADHD 경향군의 비선호 방향 평균 지각 유지 시간이 통제군에 비해 유의하게 짧은 것으로 나타났다. 또한, 중립 조건과 비교하여 성인 ADHD 경향군의 비선호 방향 지각 유지 시간이 유의미하게 짧은 것으로 나타났다. 위 결과는 성인 ADHD 경향군이 우세 자극을 억압하고 비우세 자극을 유지하는 것에 어려움이 있음을 시사한다. 연구 2에서 모호한 가현 운동 자극을 활용하여 집단 간 히스테리시스 특성의 차이가 있는지 확인하고자 하였다. 그 결과, 성인 ADHD 경향군은 통제군에 비해 수직 운동 편향을 적게 받는 것으로 나타났다. 이는 성인 ADHD 경향군이 통제 집단에 비해 대뇌반구 간 정보통합이 과다하게 일어나고 있을 가능성이 시사된다. 종합하면, 쌍안정적 자극을 통해 성인 ADHD 경향군의 히스테리시스 및 주의력 특성이 통제군과 다르게 나타나는 것을 확인함으로 쌍안정적 자극이 정신병질 집단의 특성을 드러낼 수 있는 도구로써의 가능성을 확대했다는 것에서 의의가 있다.
Abstract
The goal of this study was to examine possibility of bistable stimuli to research on attention and perceptual properties of ADHD tendency group. In research 1, we test whether there is a difference on percept switching and holding performance between ADHD tendency and control group with structure-from-motion (SFM). As a result, there is no difference in percept switching based on preferred direction between the groups. However, the holding duration for the non-preferred direction in the ADHD tendency group was significantly shorter than in the control group. Also, compared to neutral condition, the holding duration for the non-preferred direction in the ADHD tendency group was shorter. These results suggest that the ADHD tendency group has difficulty in perceptual inhibition, failing to suppress prepotent representations and sustain the opposite stimuli. In research 2, we test whether there is a difference in hysteresis properties between ADHD tendency and control group using the ambiguous motion quartet. As a result, ADHD tendency groups was less biased toward vertical motion, and hysteresis distance was significantly shorter than control group. It suggests that there may be excessive integration of information between the cerebral hemispheres in the ADHD tendency group compared to the normal group. In summary, this study reveals significant differences in hysteresis and attentional characteristics between the ADHD tendency group and the control group, highlighting the utility of bistable stimuli for demonstrating traits of this population.
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