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#1. A BCBA is teaching a client to identify and touch the letter ‘A’ from an array of letters. The BCBA wants to use a within-stimulus prompt. Which of the following strategies best exemplifies a within-stimulus prompt, according to the principles described in Applied Behavior Analysis?

Placing the letter ‘A’ closer to the client than the other letters in the array.

Physically guiding the client’s hand to touch the letter ‘A’ each time.

Changing the font size of the letter ‘A’ to be significantly larger than the other letters.

Circling the letter ‘A’ with a brightly colored marker to draw the client’s attention to it.

The text defines a withinstimulus prompt as something that directly changes how that stimulus looks by altering its physical characteristics Examples provided include making a letter bigger smaller changing the font or changing the color Option C changing the font size of the letter A to be larger directly alters a physical characteristic of the stimulus itself In contrast Option A placing the letter closer is a positional prompt which while a stimulus prompt does not change the inherent characteristics of the letter A itself Option B physical guidance is a response prompt as it acts on the learners response not the stimulus Option D circling the letter is explicitly stated in the text as not a withinstimulus prompt because it adds an additional prompt rather than changing the characteristics of the letter itself The core idea is that a withinstimulus prompt modifies the form of the target stimulus to make it more salient

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