Task reminder: Follow the transcript as the audio plays. Type the missing word in each blank exactly as heard. Spelling must be precise.

1. Sample Audio 1 — Artificial Intelligence Ethics

Artificial intelligence systems can (1) and amplify existing biases present in their training data. For example, facial recognition systems have been shown to be less (2) for people with darker skin. Ensuring AI systems are (3) and accountable requires transparency about how (4) are made and mechanisms for challenging erroneous results. This is particularly important when AI is used in (5) contexts such as criminal justice or healthcare.

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2. Sample Audio 2 — Childhood Development

The first three years of a child’s life are the most critical period for brain (1) . During this period, neural connections are formed at (2) speed. High-quality (3) , including talking, reading, and play, from caregivers is essential to healthy cognitive and (4) development. Adverse experiences such as neglect or chronic stress can (5) brain architecture in ways that affect outcomes across the lifespan.

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