A computer-controlled system for training and testing primates

The hardware and software for a computer-controlled training and testing system for primates are described. The computer (DDP-116 in the Computer-Controlled Psychology Laboratory at Carnegie-Mellon University) controls all stimulus presentation, reinforcement, and records data in a form ready for analysis on a larger computer.     

A reliable method for continuously monitoring motor activity in unrestrained squirrel monkeys

A simple, reliable, and inexpensive method for measuring spontaneous motor activity in unrestrained squirrel monkeys is described. In this method, the home cage is suspended within a wooden enclosure in a way that allows the cage to swing in any lateral direction. This movement is recorded by two brass cylinders connected to the home cage and to the fixed wooden enclosure, respectively. The brass cylinders act as electrical contacts that serve to trigger an electronic recording device. The method is extremely sensitive.     

A simple and inexpensive method to measure urinary excretion in nonhuman primates

A simple and inexpensive automated method is described for simultaneous recording of time of day and frequency of urinary excretion. A 24-h event record for eight rhesus monkeys illustrates possible usefulness of the method in determining individual differences, response to environmental factors, and diumal patterns.     

A comparison of children who receive and who do not receive permission to participate in research

In a study examining children's social competence in elementary school settings, the authors had the opportunity to compare children who received parental permission to participate to children who did not receive permission. Results indicated that children who were not involved in the study were more likely to be viewed by teachers as having unsatisfactory relationships with peers than children who were in the study. The present results suggest that investigators begin reporting the number of children who do not participate in a given study and begin examining whether minors who receive parental permission differ on important dimensions from minors who do not receive such permission. Ethical considerations of the present study are discussed.     

A simple technique for delivering liquids directly to the mouth of an unrestrained rat

A simple surgical procedure is described that makes it possible to deliver liquids directly into the mouth of a freely mobile rat. Data presented show that an 8% sucrose solution delivered by this technique is an effective reinforcer in a variety of simple and discriminative schedules of reinforcement.     

A low-force swivel connector for infusing liquids into unrestrained animals

A swivel connector for infusing liquids into catheterized animals is described. The connector turns so freely that restraints and strain relief for the catheter are unnecessary. A cylindrical acrylic body and nylon cap screw hold a rubber O ring in place, and a length of needle tubing rotates within the O ring. The only friction in the swivel is between the needle tubing and the interior of the O ring. Construction time is about 1 h. Swivels of this design have provided trouble-free service for 3 years.     

A two-way shuttlebox for testing nonhuman primates

The construction of a two-way shuttlebox suitable for testing nonhuman primates, such as rhesus macaques, is described. Special mention is made of those aspects of design and construction necessary to prevent subjects from solving experimental tasks in unforeseen and unwanted ways.     

The effects of training, epinephrine, and glucose injections on plasma glucose levels in rats

Recent findings indicate that a post-training injection of glucose enhances memory storage, suggesting that release of glucose into plasma may mediate the effects of epinephrine and perhaps other treatments on memory. The present experiment examined the effects of handling, inhibitory (passive) avoidance training, epinephrine and glucose injections on plasma glucose levels in Sprague-Dawley rats. Handling produced a small, but significant, transient increase in plasma glucose above basal levels. Saline injections caused a similar increase in circulating glucose levels. Inhibitory avoidance training with high footshock (2.0 mA, 2.0 s) resulted in significant increases in plasma glucose levels above those of low (0.5 mA, 0.75 s) and unshocked animals suggesting that glucose release is responsive to inhibitory avoidance training. Subcutaneous injections of epinephrine (0.01-1.0 mg/kg), or glucose (10-1000 mg/kg) significantly elevated glucose levels above those of saline-injected animals in a dose-dependent manner. Memory facilitating doses of epinephrine and glucose resulted in increases in plasma glucose levels similar to those seen in rats trained with high footshock. Higher doses of epinephrine and glucose resulted in further increases in circulating glucose, to levels significantly greater than those of memory facilitating doses. These results suggest that memory modulation, both endogenous and in response to epinephrine injections, may be mediated in part by circulating glucose levels. Thus, the findings of these experiments support the view that circulating glucose levels regulate the efficacy of neural memory storage processes.     

A workshop model for training the school psychologist in drug education and intervention techniques

Proposed to: (1) design a model drug training program specifically for graduate student school psychologists, (2) implement the program on a pilot basis, and (3) demonstrate an approach to evaluate the program's effectiveness. A 26-hour drug education workshop was presented to 12 graduate student school psychologists as a model training program including a variety of teaching procedures and extensive evaluation. On prepost questionnaires, improved scores reflected increased understanding of drug-related laws and terminology. While participant's ratings of their knowledge about drugs did not increase, they did rate themselves as more competent regarding drug problems. The workshop's affective climate and many of the teaching techniques were rated positively. The contributions of this workshop were its focus on training techniques and the development of one approach for evaluating training projects for school psychologists.     

A discrete-trials/fixed-interval method of discrimination training

An efficient new method of discrimination training is described which has several advantages over older free-operant and discrete-trials procedures. Illustrative data on reversal learning in pigeons and goldfish are presented.     

A technique for assessing adherence to relaxation training instructions

One of the difficulties in researching adherence to relaxation training is accurate self-monitoring. Here, a small form that fits into the case of the relaxation cassette tape is described that provides a convenient means of documenting practice, including whether the person practiced, if the practice was beneficial, and several specifics about the particular practice. A five-week trial with 36 undergraduate students indicated that it is a useful method for assessing adherence to relaxation training.     

Evaluation of an efficient method for training staff to implement stimulus preference assessments

We used a brief training procedure that incorporated feedback and role-play practice to train staff members to conduct stimulus preference assessments, and we used group-comparison methods to evaluate the effects of training. Staff members were trained to implement the multiple-stimulus-without-replacement assessment in a single session and the paired-stimulus method in another single session. In all 16 cases (2 assessments for 8 trainees), correct responding increased to over 80% accuracy; in 14 of those 16 cases, it increased to over 90% accuracy. Thus, training produced mastery-level performance in a single training session in almost all cases.