Jarvis John R, Taylor Nina R, Prescott Neville B, Meeks Ian, Wathes Christopher M
Silsoe Research Institute, Wrest Park, Silsoe, Bedfordshire, MK45 4HS, UK.
Vision Res. 2002 Jan;42(1):99-106. doi: 10.1016/s0042-6989(01)00268-1.
The photopic flicker sensitivity of the chicken was determined using an operant conditioning psychophysical technique. The results show both high- and low-frequency fall-off in the sensitivity response, which peaked around 15 Hz. Flicker sensitivity was determined for a range of stimulus luminance levels, and directly compared to human flicker response measured under similar stimulus conditions. At five luminance levels (10, 100, 200, 500 and 1000 cd/m(2)), the overall chicken flicker sensitivity was found to be considerably lower than for humans, except at high frequencies. A greater degree of frequency tuning was also found in the chicken response. The critical flicker fusion values were either similar or slightly higher for chickens compared to humans (40.8, 50.4, 53.3, 58.2 and 57.4 Hz vs 39.2, 54.0, 54.0, 57.4 and 71.5 Hz respectively for humans and chickens for increasing stimulus luminance level). A recently proposed model for flicker sensitivity [Vision Research 39 (1999) 533], which incorporates low- and high-pass temporal filters in cascade, was found to be applicable to the chicken response. From this model, deductions were made concerning mechanisms controlling the transfer of temporal information.
利用操作性条件反射心理物理学技术测定了鸡的明视觉闪烁敏感度。结果显示，敏感度响应在高频和低频处均出现下降，在15Hz左右达到峰值。测定了一系列刺激亮度水平下的闪烁敏感度，并直接与在类似刺激条件下测得的人类闪烁响应进行比较。在五个亮度水平（10、100、200、500和1000cd/m²）下，发现鸡的总体闪烁敏感度除在高频处外，均显著低于人类。在鸡的响应中还发现了更高程度的频率调谐。鸡的临界闪烁融合值与人类相似或略高（分别为40.8、50.4、53.3、58.2和57.4Hz，而人类在刺激亮度水平增加时分别为39.2、54.0、54.0、57.4和71.5Hz）。最近提出的一个闪烁敏感度模型[《视觉研究》39(1999)533]，该模型串联了低通和高通时间滤波器，被发现适用于鸡的响应。基于这个模型，对控制时间信息传递的机制进行了推断。
