Psychology · Unit 3

Senses and Perception

How we take in and make sense of the world

Perception is not recording. The brain constructs an experience from incomplete and ambiguous input, and illusions are the most direct evidence of that construction.

The unit covers the senses, attention, perception as distinct from sensation, illusions, and the gap between perception and reality.

This unit breaks down into 23 short steps and 118 questions, starting at difficulty 1 and building to 5. Below you can see exactly what it covers, how the path is structured, and worked examples with explanations.

Steps: 23
Questions: 118
Difficulty: 1-5

What this unit covers

The Five Senses
Attention
Illusions
Perception
Perception vs Reality

Where this fits

Follows What is Psychology? Connects to Biology's Nervous System and Brain.

Where people slip

Knowing an illusion is an illusion does not stop it working. Perception is largely automatic and not accessible to correction by belief, which tells you something about how it operates.

How the unit is structured

Senses and Perception runs as 23 short steps that unlock in order. 17 are practice rounds and 6 are challenge rounds that pull together everything before them. Questions start at difficulty 1 and climb to 5 as you progress.

Step 1 · easierStep 23 · harder

Challenge rounds

Example questions

30 real questions from this unit, with the answer and the reason behind it, grouped by what they practise. There are 118 in the unit altogether.

Attention

Fill the blankLevel 2
1. Focusing on your friend's voice in a noisy room is called ____ attention.
- selectivecorrect
- sleepy
- broken
- loud
Selective attention is choosing one thing to focus on and tuning out the rest.
Multiple choiceLevel 2
2. Paying good attention in class usually helps you do what?
- Learn and remember morecorrect
- Forget everything faster
- Hear less
- Get taller
Focusing your attention helps you take in and remember information better.
Odd one outLevel 2
3. Which of these is NOT a way of paying attention?
- Daydreaming about lunchcorrect
- Listening carefully to a teacher
- Watching a ball closely
- Concentrating on a puzzle
Daydreaming means your mind has wandered away instead of focusing.
True or falseLevel 2
4. You can give your full attention to everything around you at the same time.
Answer: False
Attention is limited, so we can only focus on a few things at once.
Type the answerLevel 2
5. Paying attention to one thing and tuning out the rest is called ____ attention.
Answer: selective
Selective attention is focusing on one thing while ignoring distractions.
Choose all that applyLevel 3
6. Which of these would make it harder to pay attention while studying? (Choose all that apply.)
- Phone notifications buzzingcorrect
- A loud TV in the roomcorrect
- Trying to text at the same timecorrect
- A quiet, tidy desk
Phone alerts, loud noise, and doing another task all pull attention away from studying.

Illusions

Fill the blankLevel 1
7. A picture that fools your eyes is called an optical ____.
- illusioncorrect
- photo
- mirror
- window
An optical illusion is an image that tricks the way your eyes and brain work.
Type the answerLevel 1
8. A trick on the eyes that makes something look different from how it really is is called an optical ____.
Answer: illusion
An optical illusion is a trick that fools how we see something.
Multiple choiceLevel 2
9. An optical illusion is when something looks ____ than it really is.
- differentcorrect
- exactly the same
- heavier
- quieter
In an illusion, what you see does not match what is actually there.
Odd one outLevel 2
10. Which of these is NOT a trick on your eyes?
- A clear photo of a real catcorrect
- Two equal lines that look unequal
- Dots that seem to flash on and off
- A shape that seems to move but is still
A clear photo shows things as they are, while the others fool your eyes.
True or falseLevel 2
11. If an illusion tricks you, it means your eyes are broken.
Answer: False
Illusions fool healthy eyes and brains too, because the brain makes guesses.
Match the pairsLevel 4
12. Match each illusion to what it shows.
Answer: Rubin's vase = A figure and background that can swap; Kanizsa triangle = Edges the brain fills in; Ames room = A slanted room that distorts size; Muller-Lyer = Equal lines that look unequal
Each classic illusion reveals a different way the brain builds what we see.

Perception

True or falseLevel 1
13. Perception means giving meaning to what our senses take in.
Answer: True
Sensing is picking up information, and perceiving is understanding what it means.
Choose all that applyLevel 2
14. Which of these are things perception helps us do? (Choose all that apply.)
- Recognize a friend's facecorrect
- Understand that a sound is musiccorrect
- Give meaning to what we seecorrect
- Make our hair grow
Perception lets us recognize, understand, and give meaning to what we sense.
Fill the blankLevel 2
15. Taking in raw information through your senses is called ____.
- sensationcorrect
- decision
- memory
- emotion
Sensation is when your senses first pick up information from the world.
Multiple choiceLevel 2
16. What does perception do with the signals coming from your senses?
- Understands and makes sense of themcorrect
- Deletes them right away
- Turns them into muscles
- Stores them as food
Perception is the brain making sense of raw signals from the senses.
Sort into groupsLevel 3
17. Sort each as a Gestalt grouping principle or Not a grouping principle.
Answer: Proximity = Gestalt Principle; Similarity = Gestalt Principle; Closure = Gestalt Principle; Loudness = Not A Principle; Sweetness = Not A Principle
Proximity, similarity, and closure are Gestalt principles; loudness and taste are not.
Match the pairsLevel 4
18. Match each Gestalt grouping principle to what it describes.
Answer: Proximity = Grouping items that are close together; Similarity = Grouping items that look alike; Closure = Filling in gaps to see a whole shape; Continuity = Seeing smooth, continuous lines
Gestalt principles describe how the mind groups separate parts into whole patterns.

Perception vs Reality

Choose all that applyLevel 2
19. Which of these can change the way we perceive something? (Choose all that apply.)
- Our moodcorrect
- Our past experiencescorrect
- What we expect to seecorrect
- The day of the week on a calendar
Our mood, past experiences, and expectations all shape how we perceive things.
Fill the blankLevel 2
20. Because the brain builds the picture we see, perception is partly a ____.
- constructioncorrect
- photograph
- mirror
- recording
Our brain fills in and interprets, so perception is partly a construction or guess.
Multiple choiceLevel 2
21. Two friends see the same event but remember it a bit differently. Why can this happen?
- Perception is personalcorrect
- One of them was invisible
- Events never really happen
- Eyes cannot see events
Perception is personal, so people can notice and interpret things differently.
Put in orderLevel 2
22. Put the steps in order from sensing to understanding a barking dog.
Answer: A dog barks nearby -> The sound enters your ears -> Your brain understands it is a dog
First the sound reaches your ears, then your brain understands what it is.
Sort into groupsLevel 2
23. Sort each one as Sensation (just taking in) or Perception (understanding it).
Answer: Light hitting your eye = Sensation; Sound entering your ear = Sensation; Knowing it is a dog barking = Perception; Recognizing your friend's face = Perception
Sensation is picking up raw signals, while perception is understanding them.
Match the pairsLevel 3
24. Match each term about perception to its meaning.
Answer: Perceptual set = Expecting to see something a certain way; Pareidolia = Seeing faces in random patterns; Depth perception = Judging how far away things are; Illusion = A trick that fools perception
These terms describe how the mind builds and shapes what we perceive.

The Five Senses

Fill the blankLevel 1
25. Your skin lets you feel touch, like whether something is hot or ____.
- coldcorrect
- loud
- bright
- sweet
Touch through the skin tells us about temperature, like hot and cold.
Guess the numberLevel 1
26. How many main senses do humans traditionally have?
Answer: 5 senses
We usually count five senses: sight, hearing, smell, taste, and touch.
Match the pairsLevel 1
27. Match each sense to the body part you use for it.
Answer: Sight = Eyes; Hearing = Ears; Smell = Nose; Taste = Tongue
Each of the five senses has its own main sense organ.
Multiple choiceLevel 1
28. Which body part do you use to see the world around you?
- Eyescorrect
- Ears
- Nose
- Tongue
Your eyes take in light so you can see shapes, colors, and movement.
Odd one outLevel 1
29. Which of these is NOT one of the five basic senses?
- Thinkingcorrect
- Sight
- Touch
- Smell
Thinking is something the brain does, but it is not one of the five senses.
Choose all that applyLevel 2
30. Which of these are among the five basic tastes? (Choose all that apply.)
- Sweetcorrect
- Saltycorrect
- Bittercorrect
- Spicy
- Crunchy
Sweet, salty, and bitter are basic tastes, while spicy and crunchy are not.

Where these questions come from. Each unit starts as a plan of the concepts it should cover and the difficulty it should span. Questions are written against that plan with AI assistance, then checked by a validator that rejects anything without a single defensible answer, an explanation, or plausible wrong options. How we write questions sets out the whole process, and corrections are fixed in the bank and reach the site and the app the same day.

How you practise

This unit mixes 10 different question formats, so you are recalling and applying rather than recognising the same layout every time.

Choose all that apply
Fill the blank
Guess the number
Match the pairs
Multiple choice
Odd one out
Put in order
Sort into groups
True or false
Type the answer

Practise Senses and Perception

118 questions across 23 steps. Start with step one and crawl at your own pace.

Play this unit

Read about Senses and Perception

Explainers from our blog on what this unit covers. Each one ends with real questions from the bank.

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