Question 1

What are the three main components of a discrete trial in DTT?

Accepted Answer

A discrete trial consists of the discriminative stimulus (SD), the learner's response, and the consequence (reinforcement or error correction).

Question 2

What is the inter-trial interval (ITI) in discrete trial training?

Accepted Answer

The inter-trial interval is the brief pause between the end of one discrete trial and the beginning of the next, typically lasting 1-5 seconds.

Question 3

What is a 'mass trial' format in DTT?

Accepted Answer

Mass trials involve presenting the same SD repeatedly in consecutive trials, typically used when first teaching a new skill to build initial responding.

Question 4

What is 'expanded trial' or 'distributed trial' format in DTT, and why is it used?

Accepted Answer

Distributed trials intersperse target skills among other tasks across the session, which promotes maintenance and generalization of learned skills.

Question 5

What is the difference between a most-to-least (MTL) prompting hierarchy and a least-to-most (LTM) prompting hierarchy?

Accepted Answer

MTL begins with the most intrusive prompt and fades toward independence; LTM begins with the least intrusive prompt and increases assistance only if errors occur.

RBT Exam: Skill Acquisition

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