Dissociating motoric and motivational effects of pharmacological manipulations on operant behavior is a substantial challenge. To address this problem, we applied a response-bout analysis to data from rats trained to lever press for sucrose on variable-interval (VI) schedules of reinforcement. Motoric, motivational, and schedule factors (effort requirement, deprivation level, and schedule requirements, respectively) were manipulated. Bout analysis found that interresponse times (IRTs) were described by a mixture of two exponential distributions, one characterizing IRTs within response bouts, another characterizing intervals between bouts. Increasing effort requirement lengthened the shortest IRT (the refractory period between responses). Ad...
The two experiments in this study investigated overtraining effects and frustration effects during e...
The purpose of the present research was to study the effects of timing and motivational variables on...
Rats obtained food-pellet reinforcers by nose poking a lighted key. Experiment 1 examined resistance...
The transition from goal-directed to habitual forms of instrumental behaviour is determined by varia...
We propose a novel method to dissociate incentive motivation from memory and motor processes in inst...
Conditional stimuli (CS) that are paired with reward can be used to motivate instrumental responses....
The higher response rates observed on ratio than on matched interval reward schedules has been attri...
The Mathematical Principles of Reinforcement (MPR) model accurately predicts performance in fixed ra...
A model was described that combines Grice\u27s variable threshold model for reaction time and Logan\...
Conditional stimuli (CS) that are paired with reward can be used to motivate instrumental responses....
This thesis describes a series of experiments investigating the neural underpinnings of the ‘efficac...
The challenge was finding an analysis that accounts for both response rate increases and decreases w...
This study examined the effect of regular patterns of reward and ITI on acquisition. 4 groups of 20 ...
Previous research suggested that allocation of responses on concurrent schedules of wheel-running re...
Bibliography: pages 55-60.The present study investigated the effects of shifts in reward magnitude o...
The two experiments in this study investigated overtraining effects and frustration effects during e...
The purpose of the present research was to study the effects of timing and motivational variables on...
Rats obtained food-pellet reinforcers by nose poking a lighted key. Experiment 1 examined resistance...
The transition from goal-directed to habitual forms of instrumental behaviour is determined by varia...
We propose a novel method to dissociate incentive motivation from memory and motor processes in inst...
Conditional stimuli (CS) that are paired with reward can be used to motivate instrumental responses....
The higher response rates observed on ratio than on matched interval reward schedules has been attri...
The Mathematical Principles of Reinforcement (MPR) model accurately predicts performance in fixed ra...
A model was described that combines Grice\u27s variable threshold model for reaction time and Logan\...
Conditional stimuli (CS) that are paired with reward can be used to motivate instrumental responses....
This thesis describes a series of experiments investigating the neural underpinnings of the ‘efficac...
The challenge was finding an analysis that accounts for both response rate increases and decreases w...
This study examined the effect of regular patterns of reward and ITI on acquisition. 4 groups of 20 ...
Previous research suggested that allocation of responses on concurrent schedules of wheel-running re...
Bibliography: pages 55-60.The present study investigated the effects of shifts in reward magnitude o...
The two experiments in this study investigated overtraining effects and frustration effects during e...
The purpose of the present research was to study the effects of timing and motivational variables on...
Rats obtained food-pellet reinforcers by nose poking a lighted key. Experiment 1 examined resistance...