Week 3 Discussion — Is "the Brain Did It" the Whole Story? — Traditional alternative (no AI)
Instructors: publish this instead of the adaptive version if you prefer, and unpublish or delete the adaptive one.
Hook
Ads, apps, and headlines love brain talk: a playlist that "boosts dopamine," a supplement that "fixes serotonin," a game that "unlocks the rest of your brain." This week you learned what neurons, neurotransmitters, and brain structures actually do, and why careful writers say a chemical is associated with a feeling rather than causing it. Now put that to work on a claim or a moment from your own world.
Your discussion question — choose Option A or Option B; they carry the same weight and the same rubric, and you say which you picked.
Option A: Find a real claim about the brain or a brain chemical — from an ad, an app, a wellness post, or a headline. What does it get right or wrong about this week's biology, how would you rewrite it in hedged language, and would you trust the product or advice behind it? Say what evidence would change your mind.
Option B: Pick a moment from your own life or work that your nervous system clearly ran — a scare, a practiced skill, a habit, a craving. Trace which parts of the nervous system and brain were involved, then argue: is a biological explanation of that moment enough, or does it leave out something only a psychological or social explanation can supply?
There is no single right answer here. A "dopamine detox" trend, a near-miss on the highway, or the free throw you finally stopped thinking about can all be argued well in more than one direction. Pick one you actually care about, and tell us the story.
Expectations
Activity format: one initial post followed by two substantive peer replies. Plan on about 45 minutes across the two deadlines; your instructor sets both due dates in Canvas.
Your initial post — by the first due date (early in the module week):
- Say which option you chose.
- Name the specific parts of the nervous system, brain structures, or neurotransmitters involved.
- Use at least two of this week's terms (neuron, action potential, synapse, neurotransmitter, dopamine, serotonin, sympathetic, parasympathetic, hippocampus, neuroplasticity) correctly, and write "is associated with" whenever you link a chemical to a feeling.
- Give your judgment, with a reason, and say what evidence would change your mind.
- Length: roughly 150–250 words if written. You may instead record your post as audio or video (about two minutes) and attach a transcript; both forms are scored by the same rubric.
Your replies — by the second due date (the end of the module week):
- Reply substantively to at least two classmates.
- A substantive reply does more than agree: name a third variable the poster missed, point out a "causes" that should be "associated with," add a brain structure or division they left out, or argue for a level of explanation they skipped. "Nice point!" on its own does not count.
AI use. This version is designed to be completed without AI: write your post and your replies in your own words, without a chatbot.
What a strong post looks like:
I chose Option A. A sleep app I use says its night sounds "raise serotonin, which causes deeper sleep." Serotonin is associated with mood, sleep, and appetite, so the app is pointing at a real link, but "causes" claims more than a link can carry. A third variable could explain why users sleep better: people who download a sleep app may also be the ones changing their bedtime habits. I would rewrite it as "our sounds may help you relax, and serotonin is associated with sleep." I would trust it more if users were randomly assigned to the sounds or to silence.
Notice how it names the chemical and its associated functions, catches the word "causes," names a third variable, and says what evidence would help. That is the bar.
Participation rubric
This discussion is worth 10 points. The three criteria below look at your initial post and your peer replies.
| Criterion | Full credit | Partial credit | No credit |
|---|---|---|---|
| Quality of the initial post (4 pts) | A real claim or moment is traced to specific parts of the nervous system or brain, and the judgment about it is explained with a reason | A claim or moment is present, but the biology is vague or the judgment is asserted without a reason | Missing, off-topic, or no reasoning about the biology |
| Use of course concepts (3 pts) | Names neurons, neurotransmitters, divisions, or structures precisely, and writes "associated with" rather than "causes" for any chemical and feeling | Uses a term loosely, or slips once into causal language | No course terms, or used incorrectly |
| Engagement with peers (3 pts) | Two or more substantive replies that extend or challenge a classmate's reasoning | One substantive reply, or replies that only agree | No replies, or "I agree" with nothing added |
Post early if you can — the best threads happen when people have time to reply before the second due date.
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