Establishing equivalence-equivalence analogical relations via tact and listener training

Correspondence Between Vocal-Verbal Behavior and Go/No-Go Responses During the Successive Matching-to-Sample Procedure

In the current study, eight college students were exposed to a successive matching-to-sample (S-MTS) procedure utilizing non-verbal auditory stimuli consisting of common sounds. During emergent relations tests, participants were asked to talk aloud, and their vocal-verbal statements were transcribed and categorized as class-consistent, class-inconsistent, or irrelevant. All participants met emergence criterion for symmetry and four did so for transitivity/equivalence. Analysis of vocal-verbal statements showed a positive correlation between class-consistent statements emitted by participants and correct selection responses during S-MTS tasks. Such results suggest possible verbal mediation during emergent relations tests.

Acquisition of Children's Relational Responding: The Role of the Intradimensional and Interdimensional Abstract Tact and the Autoclitic Frame

The acquisition of verbal behavior is complex and requires the analysis of myriad variables. Ernst Moerk estimated that by the time a child has reached 4 years of age they have experienced nearly 9 million language learning trials with mothers using at least 14 categories of maternal teaching interactions. The interactions provide a foundation for children learning the tact, mand, echoic, intraverbal, autoclitic, and other relations, described by Skinner in Verbal Behavior. Here we examine two relations that have been overlooked to some extent and arguably account for many of the generative features of verbal behavior and shared meaning: the abstract tact, or more precisely the interdimensional abstract tact, and the autoclitic frame. We describe Goldiamond's treatment of stimulus control in its many forms; dimensional, abstractional, and instructional, and how it can be used to understand the acquisition of both intradimensional and interdimensional abstract tacts and autoclitic frames that guide seemingly complex relational responding and meet consequential contingency requirements. We argue the development of complex relational responding in children can be explained parsimoniously without mediating variables or hypothetical constructs.

Emergence of a three-sample conditional discrimination as foundation for reasoning capabilities

We hypothesized that a three-sample conditional discrimination can emerge as a result of learning conditional discriminations with relational stimuli. After learning three first-order conditional discriminations AB, PQ, and CD, we taught a second-order conditional discrimination XAB in which X1 indicated selection of related stimuli (e.g., A1 and B1) and X2 of unrelated stimuli (e.g., A1 and B2). Then, we probed the emergence of conditional discriminations PQX and XCD in which the X stimuli were comparisons and contextual stimuli, respectively. Finally, a conditional discrimination was probed with stimuli P, Q, and C as samples and D1 and D2 as comparisons. When the P and Q stimuli were related (and related to X1 in PQX), all participants selected the D stimulus that was related to the C stimulus (D1 when C1 was present and D2 when C2 was present); when the P and Q stimuli were unrelated (and related to X2 in PQX), they selected the D stimulus unrelated to the C stimulus (D2 when C1 and D1 when C2), which demonstrated emergence based on the relations established among all stimuli. In Experiment 2, the teaching of XAB was omitted and only one in six participants demonstrated emergence, which indicated that relational stimuli X1 and X2 played an important role in emergence. Thus, a new type of emergence that mimics analogical reasoning was demonstrated. The obtained outcome suggests that this procedure provides a learning foundation for acquiring reasoning capabilities.

Establishing derived reinforcers via stimulus equivalence

If one of several stimuli in an equivalence class acquires a function, it transfers to all members of the respective class. Even though research has demonstrated this transfer across a variety of stimulus functions (e.g., discriminative), few studies have focused on the transfer of the reinforcing function. The current study extended previous literature by establishing derived reinforcers using conditional discrimination training with six neurotypical adults. We established three 4-member equivalence classes and then created a discriminative stimulus in one member by correlating it with reinforcement. We also expanded classes by adding a stimulus to each class and testing its function. During the transfer of function tests, five out of six participants chose the derived reinforcers more than the other stimuli. Three participants required remedial training or testing prior to demonstrating transfer of function. Results show that stimulus equivalence training is an effective and efficient paradigm to establish derived reinforcers.

Merger and expansion of equivalence classes via meaningful stimuli

The present experiments evaluated the effect of meaningful stimuli on the inclusion of a set of extra-experimental meaningful pictures into equivalence classes using within- and between-subjects designs. There were 35 adult participants in total (N_EXP1 = 22; N_EXP2 = 13). In both experiments, participants were first trained on 6 baseline relations with abstract stimuli (A, B, and C) and assessed on the emergence of three 3-member equivalence classes. Next, they were trained on DA relations and assessed on the inclusion of the D stimuli and a set of meaningful pictures in the equivalence classes. In Experiment 1, D1 and D2 were meaningful written words and D3 was a written pseudoword. In Experiment 2, for 2 groups, D1, D2, and D3 were meaningful words; for another group, D1, D2, and D3 were pseudowords. In both experiments, participants formed the ABC classes and included the D stimuli in the classes. When D was a meaningful word, participants also included a set of pictures potentially related to the word in the ABC class established experimentally. The results have implications for the definition of meaningfulness and contribute to discussions on the impact of test arrangements on emergent responding.