1. Arbitrary stimulus class

 antecedent stimuli that evoke the same response but do not resemble each other in physical form or share a relational aspect such as bigger or under.

1. Concept formation:

 a complex example of stimulus control that requires stimulus generalization within a class of stimuli and discrimination between classes of stimuli.

1. Discriminative stimulus: .

1.  a stimulus in the presence of which responses of some type have been reinforced and in the absence of which the same type of responses have occurred and not been reinforced.

1. Feature stimulus class

1.  stimuli that share common physical forms of or structures or common relative relationships.

1. Matching-to-sample:

1. : a procedure for investigating conditional relations and stimulus equivalence.

1. Reflexivity:

1. a type of stimulus-to-stimulus relation in which the learner, without any prior training or reinforcement for doing so, selects a comparison stimulus that is the same as the sample stimulus e.g. A=A.

1. Stimulus delta:

1. a stimulus in the presence of which a given behavior has not produced reinforcement in the past.

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   1. Stimulus discrimination training

    

1. conventional procedure requires one behavior and two antecedent stimulus conditions.

    

1. Stimulus equivalence

1.  the emergence of accurate responding to untrained and non-reinforced

1. Stimulus generalization

1. : when an antecedent stimulus has a history of evoking a response that has been reinforced in its presence , the same type of behaviors tend to be evoked by stimuli that share similar physical properties with the controlling antecedent equivalence.

1. Stimulus generalization gradient:

a graphic depiction of the extent to which the behavior that has been reinforced in the presence of the specific stimulus condition in emitted in the presence of other stimuli.

1. Symmetry:

1. a type of stimulus-to-stimulus relationship in which the learner, without prior training or reinforcement for doing so, demonstrates the reversibility of matched sample and comparison stimuli.

1. Transitivity

1. a derived stimulus-stimulus relation that emerges as a product of training to two other stimulus-stimulus relations (e.g., A=C, C=A).