Course: Introduction to Psychology (PSYC 1) · Silver Oak University (fictional sample) · Prof. Bennett
Module: Week 4 of 16 · Fall 2026 · in-person, two 75-minute sessions
Objective covered: Objective 4 — Explain how humans sense and perceive the world (the sensation & perception half).

This file holds two pieces: (A) the Module 4 Overview page ("Start Here") and (B) the Welcome Announcement that drips out when the module opens. Dates below assume a Tuesday/Thursday session pattern with Week 4 meeting Tue Sep 22 and Thu Sep 24, and end-of-week work due Sunday Sep 27, 11:59 p.m. Adjust the day-of-week and times to match your section.

(A) Module 4 Overview — Start Here

Welcome to Week 4: Sensation & Perception

This is your home base for the week. Read it first, then work the checklist below from top to bottom. Everything you need is linked inside the module.

This week answers a question you've never had to ask because the answer feels too obvious: how do you know what's out there? You'd say "I just see it, I just hear it" — but that turns out to be two different jobs your body and brain split between them. Your senses detect raw physical energy (light, sound, pressure). Your brain organizes and interprets that energy into the meaningful world you actually experience. The gap between those two jobs is where illusions live, where "the dress" arguments come from, and where you'll spend the week.

The week's big question

"If your eyes work like a camera, why can two people look at the same image and see different things — and why do illusions fool everyone?"

By Friday you'll be able to tell sensation from perception, follow a beam of light to the back of your eye, name the rules your brain uses to organize a scene, and explain — with illusions as your evidence — why "seeing is believing" is misleading.

By the end of this week, you can…

Use this as a checklist. If you can do all four out loud, you're ready for the quiz.

• [ ] Tell sensation from perception — sensation = your receptors detecting physical energy; perception = your brain organizing and interpreting it — and define transduction (turning that energy into neural signals).
• [ ] Contrast bottom-up and top-down processing, and use the psychophysics ideas: absolute threshold, difference threshold / JND, Weber's law, and sensory adaptation.
• [ ] Trace vision from light → cornea → pupil/iris → lens → retina, and tell rods (dim light, periphery, black-and-white) from cones (color and fine detail).
• [ ] Name the Gestalt principles (figure-ground, proximity, similarity, closure, continuity) and the depth cues (binocular vs. monocular), and explain why constancies and illusions prove perception is constructed.

What's due this week, and when

Work these in order — each one gets you ready for the next.

Heads-up on the AI tutorial: you'll use a chatbot to draft and explain, and then you judge its work against what we cover in class. Chatbots routinely conflate the absolute threshold and the difference threshold — catching that mix-up is exactly the point.

Late policy reminder: 10% off per day late. If life happens, reach out before the deadline — I'd much rather hear from you early.

How to succeed this week

• Lead with the idea, not the jargon. Every term this week is a plain-English idea first (sensation = detect it; perception = interpret it; transduction = translate it). The vocabulary comes after the idea clicks.
• Memorize three tiny hooks. "Detect · Translate · Interpret" (sensation, transduction, perception). "Cones for Color" (rods are for dim light). And "Two eyes = binocular cues; one eye = monocular cues."
• Use your own eyes as the lab. Try the demos from class — the finger that jumps when you switch eyes (retinal disparity), the faint star that vanishes when you look right at it (rods vs. cones). Feeling a concept beats memorizing it.
• Collect illusions. Every illusion is evidence for the week's headline: perception is built, not photographed. Bring one to the discussion.
• Treat the chatbot as a smart intern, not an oracle. It drafts; you check. That habit is the whole semester in miniature.

You don't need any background for this week — just your own senses and a willingness to be surprised by them. Come to class ready to argue about what color the dress is. See you Tuesday.

(B) Welcome Announcement — Module 4

Release setting: post on the module's start day (offset = 0 days), i.e., Mon Sep 21, 2026 — not before. If your platform won't preserve the scheduled date on import, post this as a draft labeled "Release: Mon Sep 21."

Subject: Welcome to Week 4 — can you trust your own eyes? 👁️

Hi everyone,

Quick experiment before we start. Hold up one finger at arm's length, line it up with something across the room, then close one eye — and switch to the other eye without moving your finger. The finger jumps, right? Your two eyes sent your brain two slightly different pictures, and your brain quietly built a single 3-D scene out of them. You never noticed it doing the work — until now.

This week — Sensation & Perception — we tackle the big question: If your eyes worked like a camera, why can two people see the same image differently, and why do illusions fool everyone? The answer is that seeing isn't recording. Your senses detect raw physical energy; your brain organizes and interprets it into the world you actually experience. Those are two different jobs — and the space between them is where this whole week lives.

Three things not to miss:
1. Lecture Tutorial 4 — work through sensation vs. perception, how vision actually works (rods vs. cones), and the Gestalt rules your brain uses to organize a scene, with one approved chatbot (Gemini, Claude, or ChatGPT). You'll catch the model conflating two kinds of "threshold," not just trust it. Due Sun Sep 27.
2. Quiz 4, Discussion 4, and Assignment 4 also close Sun Sep 27 — the discussion ("Can You Trust Your Senses?") asks you to bring an illusion or a moment your senses fooled you, so start early and leave time to reply to classmates.
3. Open the Start Here page first — it lays out everything in order with due dates.

One promise: by Friday you'll never look at an optical illusion the same way again. You'll know it's not a glitch — it's a window into how your brain builds everything you see, all the time.

Bring your curiosity (and a strong opinion about the color of that dress) to class on Tuesday.

See you soon,
Prof. Bennett