کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2427350 | 1105957 | 2009 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effects of unpredictable changes in initial-link duration on choice and timing Effects of unpredictable changes in initial-link duration on choice and timing](/preview/png/2427350.png)
Four pigeons responded in a concurrent-chains procedure in which terminal-link schedules were fixed-interval (FI) 10 s and FI 20 s. Across sessions, the location of the shorter terminal-link changed according to a pseudorandom binary sequence. Each session, the variable-interval initial-link schedule value was sampled from a uniform distribution that ranged from 0.01 to 30 s. On some terminal links, food was withheld to obtain measures of temporal control. Terminal-link delays determined choice (log initial-link response ratios) and timing (start and stop times on no-food trials) measures, which stabilized within the 1st half of each session. Preference for the shorter terminal-link delay was a monotonically decreasing function of initial-link duration. There was no evidence of control by initial-link durations from previous sessions.
Journal: Behavioural Processes - Volume 81, Issue 2, June 2009, Pages 227–232