Learning to stop or reset the internal clock

In the present experiments, after training rats in a standard fixed interval (FI) 30s schedule, we induced a change in the strategy employed during gap trials, by presenting during FI with gaps training, 9-s interruptions of the FI discriminative stimulus in 40% of the trials; in one type of interruption, after the discriminative stimulus resumed, the FI was re-started; in the second type of interruption, the FI had to be completed considering the time before the interruption. The effect of these manipulations was tested in a peak-interval with gaps procedure. The main result was that the strategy employed during gap trials depended on the type of interruption experienced during the training phase, both in a comparison between subjects (experiment 1) and within subjects (experiment 2).

[1]  B. L. Brown,et al.  The effects of concurrent task and gap events on peak time in the peak procedure , 2004, Behavioural Processes.

[2]  Catalin V Buhusi,et al.  Temporal integration as a function of signal and gap intensity in rats (Rattus norvegicus) and pigeons (Columba livia). , 2002, Journal of comparative psychology.

[3]  B. L. Brown,et al.  Internal Clock and Memory Processes in Animal Timing , 1994 .

[4]  Jerome S. Cohen,et al.  Timing light and tone signals in pigeons. , 1989 .

[5]  W. Meck,et al.  Reinforcement-induced within-trial resetting of an internal clock , 1999, Behavioural Processes.

[6]  J. Staddon,et al.  An effect analogous to “frustration” on interval reinforcement schedules , 1966 .

[7]  S. Roberts,et al.  Isolation of an internal clock. , 1981, Journal of experimental psychology. Animal behavior processes.

[8]  P. B. Dews,et al.  THE EFFECT OF MULTIPLE SΔ PERIODS ON RESPONDING ON A FIXED‐INTERVAL SCHEDULE1 , 1962 .

[9]  Catalin V Buhusi,et al.  Memory for timing visual and auditory signals in albino and pigmented rats. , 2005, Journal of experimental psychology. Animal behavior processes.

[10]  T. Zentall.  Timing, memory for intervals, and memory for untimed stimuli: The role of instructional ambiguity , 2005, Behavioural Processes.

[11]  B. L. Brown,et al.  The effect of intruded events on peak time: The role of reinforcement history during the intruded event , 2007, Behavioural Processes.

[12]  Catalin V Buhusi,et al.  Interval timing with gaps and distracters: evaluation of the ambiguity, switch, and time-sharing hypotheses. , 2006, Journal of experimental psychology. Animal behavior processes.

[13]  Catalin V. Buhusi,et al.  Time sharing in rats: A peak-interval procedure with gaps and distracters , 2006, Behavioural Processes.

[14]  Interval timing with gaps: gap ambiguity as an alternative to temporal decay. , 2005, Journal of experimental psychology. Animal behavior processes.

[15]  Russell M. Church,et al.  Control of an internal clock. , 1978 .

[16]  Catalin V. Buhusi,et al.  Prenatal choline supplementation increases sensitivity to contextual processing of temporal information , 2008, Brain Research.

[17]  R M Church,et al.  Properties of the Internal Clock a , 1984, Annals of the New York Academy of Sciences.

[18]  Thomas R Zentall,et al.  Timing in pigeons: effects of the similarity between intertrial interval and gap in a timing signal. , 2002, Journal of experimental psychology. Animal behavior processes.

[19]  C Fortin,et al.  Expecting a break in time estimation: attentional time-sharing without concurrent processing. , 2000, Journal of experimental psychology. Human perception and performance.

[20]  Catalin V. Buhusi,et al.  Time-sharing in pigeons: Independent effects of gap duration, position and discriminability from the timed signal , 2006, Behavioural Processes.