Stimulus Equivalence: Effects Of A Default-response Option On Emergence Of Untrained Stimulus Relations

Human subjects were exposed to a concurrent-chains schedule in which reinforcer amounts, delays, or both were varied in the terminal links, and consummatory responses were required to receive points that were later exchangeable for money. Two independent variable-interval 30-s schedules were in effect during the initial links, and delay periods were defined by fixed-time schedules. In Experiment 1, subjects were exposed to three different pairs of reinforcer amounts and delays, and sensitivity to reinforcer amount and delay was determined based on the generalized matching law. The relative responding (choice) of most subjects was more sensitive to reinforcer amount than to reinforcer delay. In Experiment 2, subjects chose between immediate smaller reinforcers and delayed larger reinforcers in five conditions with and without timeout periods that followed a shorter delay, in which reinforcer amounts and delays were combined to make different predictions based on local reinforcement density (i.e., points per delay) or overall reinforcement density (i.e., points per total time). In most conditions, subjects' choices were qualitatively in accord with the predictions from the overall reinforcement density calculated by the ratio of reinforcer amount and total time. Therefore, the overall reinforcement density appears to influence the preference of humans in the present self-control choice situation.     

Appetitive and Aversive Reinforcement Schedule Effects on Behavior: A Systematic Replication

Three male volunteers lived for six successive days within a laboratory environment programmed for continuous residence. During days when subjects' work on a multiple task performance battery had the effect of preventing reductions in accumulated group earnings, all subjects complained, one subject stopped working, and another subject's productivity declined. When identical work had the effect of incrementing group earnings, such byproducts of aversive control were absent. These results extend the generality of previous analyses of reinforcement schedule effects on behavior and thereby demonstrate their reliability. The reactions of the subjects to the aversive reinforcement schedule were similar to the reactions of the crew manning the last Skylab mission.     

Matching-to-Sample and Stimulus-Pairing-Observation Procedures in Stimulus Equivalence: The Effects of Number of Trials and Stimulus Arrangement

The Psychological Record - Studies comparing the effectiveness of the stimulus-pairing-observation and matching-to-sample procedures in facilitating equivalence relations have reported conflicting...     

Effects of Metacontingencies on Cooperative Behavior: A Systematic Replication Using Innovative Procedures during Isolation

The Psychological Record - The study replicated research on metacontingencies that used a chessboard simulating a simplified chess game, in a completely online environment, with participants in...     

Stimulus Equivalence Using a Respondent Matching-to-Sample Procedure with Verification Trials

The Psychological Record - Despite systematic demonstrations of the effectiveness of the respondent-type procedure in producing relational responding, matching-to-sample continues to be the...     

When to Self-Correct Spelling Words: A Systematic Replication

Previous studies have consistently demonstrated self-correction to be more effective than traditional approaches to spelling instruction. This investigation examined the comparative effects of self-correction after attempting each word and self-correction after attempting a list of 10 words by six fifth-graders with learning disabilities or attention deficit-hyperactivity disorder. An alternating treatments design showed self-correction after each word to be more effective for (a) acquisition of new spelling words as measured by weekly spelling tests for five of the six students, and (b) maintenance of spelling words as measured by 1-week maintenance tests for all six students.     

Generalized Break Equivalence II: Contextual Control Over A Generalized Pattern of Stimulus Relations

The Psychological Record - In an earlier work (Gomez, Barnes-Holmes, & Luciano, 2001), it was found that although generalized break equivalence was achieved for 3 subjects (i.e., responding...     

Effects of an Online Stimulus Equivalence Teaching Procedure on Research Design Open-Ended Questions Performance of International Undergraduate Students

The Psychological Record - The purpose of the present study was to assess if training in matching-to-sample (MTS) tasks would yield not only new MTS performance but also written topography-based...     

Probability of Stimulus Equivalence as a Function of Class Size vs. Number of Classes

The Psychological Record - Two experiments were conducted to study stimulus equivalence as a function of class size and number of classes. In the first experiment, equivalence was tested in 50...     

Controlling Relations in Baseline Conditional Discriminations as Determinants of Stimulus Equivalence

The Psychological Record - Variation in baseline controlling relations is suggested as one of the factors determining variability in stimulus equivalence outcomes. This study used single-comparison...     

The Effects of Low Self-Control and Desire-for-Control on White-Collar Offending: A Replication

To further our understanding of the similarities and differences between street-level and white-collar offending, two personality traits were used to predict offending intentions. The independent and joint roles of low self-control and desire-for-control on intentions to engage in embezzlement, credit card fraud, and shoplifting were assessed. Findings suggested that while low self-control was predictive of intentions to offend, the impact of desire-for-control varied based on the respondent’s level of self-control. In contrast to prior studies, desire-for-control reduced offending intentions, but only among those with high self-control. A discussion of these findings is offered, along with study limitations and future directions.     

Effects of Response Blocking and Programmed Stimulus Control on Motor Stereotypy: A Pilot Study

We evaluated response blocking with programmed stimulus control, wearing tennis wrist bands, to reduce motor stereotypy in a student with autism. Response blocking was effective and subsequent analysis revealed that wearing the tennis wrist bands alone maintained low frequency stereotypy. Results suggest that controlling effects from a procedure such as response blocking can be transferred to a programmed stimulus in the absence of physical intervention.     

The Effect of Stimulus Preexposure on Responding during a Compound Stimulus

In two experiments with rats, three stimuli, A, B, and X, were used for an AX+ BX+ Xo discrimination in which food was presented after the simultaneous presentation of A and X, or B and X, but never after X by itself. For one group in each experiment, X was repeatedly presented by itself before the start of discrimination training. This manipulation weakened responding on test trials in which the three stimuli were presented together. The results are interpreted in terms of a configural theory of conditioning that assumes that preexposure to a stimulus will reduce its capacity to promote generalization among different configurations to which it belongs.     

Observational Effects on Preference Selection for Four Children on the Autism Spectrum: A Replication

Individuals with autism have been noted to have restricted interests and repetitive behavior such as nonfunctional manipulation of objects. In this study, we used an observational conditioning procedure to switch the preference of items for four individuals diagnosed with autism who are considered lower functioning. The procedure consisted of the participant observing an adult playing with toys that were initially non‐preferred by the participant in a functional and engaging manner. For two participants, results were similar to the findings by Leaf; one participant required additional conditioning procedures, and we were unable to switch the preference for the other participant. Copyright © 2015 John Wiley & Sons, Ltd.     

Stimulus Classes Formation in Concurrent Discriminations in Rats as a Function of Overtraining

The Psychological Record - The present two experiments conducted a limited parametric study of the overtraining variable using a whole-partial reversal procedure in rats. Rats received two...     

The Effects of a Pretrained Excitatory Stimulus on Schedule-Induced Polydipsia in the Rat

The purpose of the present study was to test two predictions derived from the application of Pavlovian conditioning principles to the schedule-induced polydipsia (SIP) phenomena. The first prediction was that a pretrained excitatory signal for pellet delivery would facilitate the development of SIP. A second prediction was that phenomena which are typically observed in Pavlovian conditioning experiments, such as learned irrelevance, latent inhibition, and the US preexposure effect, would also be observed in the SIP paradigm. The results indicated that a group given excitatory pretraining to a tone failed to develop SIP more rapidly than controls when this tone was used to signal pellet deliveries during SIP training. However, learned irrelevance, latent inhibition, and the US preexposure effect were demonstrated. Thus, these data generally support the predictions derived from the Pavlovian conditioning view of SIP.

     

Effects of Academic Achievement and Gender on Academic and Social Self-Concept: A Replication Study

Female and male eighth-grade students representing very high, moderately high, and average levels of achievement were compared on measures of academic and social self-concept. Most of the differences were in academic self-concept, which was positively related to level of academic achievement. There also was an interaction of gender and academic achievement on academic self-concept. Average achieving girls had lower academic self-concept scores than all other groups of students. In addition, boys scored higher than girls on measures of academic self-concept and job competence. There were no significant differences on any of the social self-concept measures. The counseling implications of these findings for gifted students and girls of average achievement are discussed.     

A Systematic Replication and Extension of Using Incremental Rehearsal to Improve Multiplication Skills: An Investigation of Generalization

The purpose of this study was to replicate and extend a previous study by Burns (Education and Treatment of Children 28: 237–249, 2005) examining the effectiveness of incremental rehearsal on computation performance. A multiple-probe design across multiplication problem sets was employed for one participant to examine digits correct per minute and percentage of digits correct on problems targeted during treatment and response maintenance sessions. Treatment occurred twice weekly across 12 weeks. Retention of target facts was measured prior to each treatment session. Treatment impact on generalized skills including single skill mastery probes, multiplying fractions, and word problems was examined. Results suggested that the participant achieved accurate and fluent performance on the problem sets. This performance was maintained over time and generalized to SSM, fraction, and word problem probes.     

Generalization of Supermarket Shopping Skills for Individuals with Mild Intellectual Disabilities Using Stimulus Equivalence Training

The Psychological Record - We developed an intervention to promote generalization in an applied community setting. The intervention was derived primarily from experimental research examining...     

Using a Stimulus Equivalence Paradigm to Teach Numerals, English Words, and Native American Words to Preschool-Age Children

Most of the nearly 300 indigenous American languages in North America are moribund, including Ojibwe and Dakota. Despite numerous basic studies of stimulus equivalence, only a small handful of applied studies have demonstrated that a stimulus equivalence paradigm can be an effective and efficient means of teaching several concepts including math, spelling, and a second language. This study was designed to apply a stimulus equivalence paradigm involving match-to-sample procedures to teaching numbers and words in a second, endangered, language. A pretest–posttest randomized group design was used to examine the effectiveness of a stimulus equivalence computer program for teaching unknown Ojibwe and Dakota words to pre-kindergarteners. All of the participants who received the computer training demonstrated the development of equivalence classes that included numerals, spoken English words, and written words in Ojibwe and Dakota. Results also suggested that the stimulus equivalence paradigm may be an efficient way to teach words in a second language and to aid in language revitalization efforts.