4. Discussion
This study aimed to understand the nature of functional depth perception in WS; there is a dearth of research in this area despite frequent reports of atypical depth processing from parents and individuals with WS (such as the unpublished questionnaire from our lab discussed in Section 1). Using two simple tests of monocular and binocular depth perception and action we have highlighted atypical processing of depth information in WS when compared to non-verbal ability matched control participants.
One third of participants with WS demonstrated deficits in stereoacuity that prevented completion of the FSN, i.e. stereoacuity was poorer than that of a TD infant at six months. Even for the WS group that could complete the FSN, stereoacuity was at the level expected for a TD three year old despite an average chronological age of 26 years 11 months. There was no significant correlation of stereoacuity with age. Conversely the TD group's stereoacuity was age-appropriate and no TD participant failed to complete the task. Therefore the WS group showed a marked deficit in stereoacuity, as functional age was well below that of chronological age and stereoacuity did not improve with development. This is clear evidence of a deficit in the ability to extract information about depth, which is consistent with reports of functional deficits in depth in WS (Withers, 1996). However a limitation of this study is that we used low-level tests of stereopsis. Future research would benefit from studying a broader range of monocular and binocular depth cues, including assessment of participants’ ability to use depth cues to act in depth, such as when walking or judging the speed of cars when crossing a road.
4. สนทนาการศึกษานี้มีวัตถุประสงค์เพื่อเข้าใจธรรมชาติของการรับรู้ความลึกงานใน WS มีการขาดแคลนงานวิจัยด้านนี้แม้มีรายงานบ่อยครั้งของการประมวลผลพิเศษลึกจากผู้ปกครองและบุคคลกับ WS (เช่นแบบสอบถามที่ประกาศจากห้องแล็บของเรากล่าวถึงในส่วนที่ 1) ใช้ทดสอบสองอย่างรู้ลึก monocular และส่องทางไกลและการกระทำเราได้เน้นการประมวลผลข้อมูลลึกใน WS เมื่อเปรียบเทียบกับผู้เข้าร่วมในการควบคุมคำพูดไม่สามารถจับคู่พิเศษOne third of participants with WS demonstrated deficits in stereoacuity that prevented completion of the FSN, i.e. stereoacuity was poorer than that of a TD infant at six months. Even for the WS group that could complete the FSN, stereoacuity was at the level expected for a TD three year old despite an average chronological age of 26 years 11 months. There was no significant correlation of stereoacuity with age. Conversely the TD group's stereoacuity was age-appropriate and no TD participant failed to complete the task. Therefore the WS group showed a marked deficit in stereoacuity, as functional age was well below that of chronological age and stereoacuity did not improve with development. This is clear evidence of a deficit in the ability to extract information about depth, which is consistent with reports of functional deficits in depth in WS (Withers, 1996). However a limitation of this study is that we used low-level tests of stereopsis. Future research would benefit from studying a broader range of monocular and binocular depth cues, including assessment of participants’ ability to use depth cues to act in depth, such as when walking or judging the speed of cars when crossing a road.
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