Niemi P
Percept Mot Skills. 1981 Oct;53(2):615-9. doi: 10.2466/pms.1981.53.2.615.
The effects of constant and variable stimulus intensity on simple RT were investigated with an effective intensity manipulation. Luminances were 40 and 90 dB re 10(-10) lambert. RT was generally longer when intensity varied within a session than when it was constant. RT also was longer when a bright stimulus was presented on the preceding trial as opposed to a weak one. These effects were not found in earlier studies in which differences in luminance were small. However, the RT-difference between bright and dim stimuli was equal under the conditions of constant and variable intensity. Hence the present results replicate only in part the auditory findings of Grice and Hunter (1964) and Thrane (1961).
通过有效的强度操纵，研究了恒定和可变刺激强度对简单反应时（RT）的影响。亮度分别为40和90分贝（相对于10^(-10)朗伯）。在一个实验环节中，当强度变化时，反应时通常比强度恒定时更长。与弱刺激相比，当在前一次试验中呈现强刺激时，反应时也更长。在早期亮度差异较小的研究中未发现这些效应。然而，在恒定和可变强度条件下，强刺激和弱刺激之间的反应时差异是相等的。因此，本研究结果仅部分重复了格赖斯和亨特（1964年）以及特拉内（1961年）的听觉研究结果。
