BCBA® Section B2 Explained | 6th ed. Stimulus and Stimulus Class

A stimulus and a stimulus class are not the same thing — and on the BCBA® exam, knowing the difference is the key to a whole cluster of questions. In this Section B.2 breakdown (6th Edition Test Content Outline), we define stimulus and stimulus class, sort out the three types (formal, functional, and temporal), and connect it all to stimulus control, generalization, and discrimination — with examples you can recognize instantly on test day.

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WHAT YOU'LL LEARN
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• The difference between a stimulus and a stimulus class
• Formal vs. functional vs. temporal stimulus classes
• How stimulus classes form (and why function matters most)
• Stimulus control, generalization, and discrimination — clearly distinguished
• How stimulus class differs from response class

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CHAPTERS
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00:00 Introduction – Section B.2 Overview
01:03 Stimulus vs. Stimulus Class: Core Distinctions
02:09 Three Types of Stimulus Classes Compared
03:15 Stimulus Class Formation: Four Key Processes
04:22 Stimulus Generalization vs. Stimulus Discrimination
05:36 Stimulus Control: Key Elements and Examples
06:34 Unconditioned vs. Conditioned vs. Generalized Stimuli
07:38 How Stimulus Classes Form: A Three-Step Process
08:42 Stimulus Class Applications in ABA
09:54 Stimulus Control: Four Key Features
10:55 Respondent vs. Operant Stimulus Relations
12:02 Stimulus Class vs. Response Class
13:09 Key Takeaways & Final Review

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This video is part of our BCBA® 6th Edition exam-prep series, covering the full Test Content Outline (Sections A–I) one task at a time. Subscribe so you don't miss the next one.

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