Finke R A, Kosslyn S M
J Exp Psychol Hum Percept Perform. 1980 Feb;6(1):126-39. doi: 10.1037//0096-1523.6.1.126.
Subjects made judgements of resolution on two small dots that they either imagined or acutally observed at horizontal and vertical positions away from the point of eye fixation. As the distance between these two dots increased, the size of fields of resolution in imagery increased, in proportion to increases in the size of fields of resolution in perception. For vivid imagers, fields of resolution in imagery were the same size as those in perception, whereas for nonvivid imagers, fields of resolution in imagery were smaller than those in perception. In addition, fields of resolution in imagery and perception were virtually identical in shape, exhibiting similar horizontal eccentricity and vertical asymmetry. Fields within which attention can be distributed in imagery were also measured by having subjects make judgements of resolution on pairs of dot patterns imagined simultaneously on opposite sides of the point of eye fixation. These fields were smaller than fields of resolution for images of single dot patterns and were circular, as opposed to elliptical. These results suggest that peripheral acuity in visual imagery is limited by the same types of neural constraints that limit peripheral acuity in visual perception.
受试者对两个小点的分辨率进行判断，这两个小点他们要么想象出来，要么实际观察到，处于水平和垂直位置且远离眼睛注视点。随着这两个点之间距离的增加，意象中分辨率视野的大小也随之增加，与知觉中分辨率视野大小的增加成比例。对于生动成像者而言，意象中分辨率视野的大小与知觉中的相同，而对于非生动成像者，意象中分辨率视野的大小比知觉中的小。此外，意象和知觉中分辨率视野的形状几乎相同，呈现出相似的水平偏心率和垂直不对称性。通过让受试者对在眼睛注视点两侧同时想象出的成对点状图案的分辨率进行判断，也测量了意象中能够分配注意力的视野。这些视野比单个点状图案图像的分辨率视野小，并且是圆形的，而非椭圆形。这些结果表明，视觉意象中的外周视敏度受到与限制视觉知觉中外周视敏度相同类型的神经约束。
