Sensory, Attentional and Perceptual Processes
Class 11 · Psychology
4 ideas in Class 11 Psychology, explained in plain words, with games and quizzes to practise.
Senses and Stimuli
Part of: Senses and attention
Each sense organ answers its own kind of energy: eyes to light, ears to sound, skin to touch and heat, tongue and nose to chemicals. A stimulus must be strong enough to cross the sensing limit, and steady inputs fade from notice through adaptation, like an incense smell vanishing after minutes.
Why it matters. Learners often think senses record the world like cameras. Knowing limits and adaptation explains why faint cues are missed and why constant surroundings fade away.
Key words
- Stimulus
- : Energy or object that excites a sense organ.
- Sense modality
- : One channel of sensing, such as vision or hearing.
- Threshold
- : The weakest input that can just be sensed.
- Adaptation
- : Fading of notice under steady unchanging input.
- Attention
- : Focusing the mind on chosen inputs.
Try it in two minutes
- Ask the learner to close eyes and name three sounds in the room.
- Ask which sound is faintest and why it is nearly missed.
- Ask what steady smell or hum they stopped noticing.
- Ask how adding light or silence would change sensing.
Try at home. Sit quietly for two minutes, list faint sounds heard, and note which steady sound faded.
Attention and Its Types
Part of: Senses and attention
Attention picks a few inputs from the flood around us. Selective attention locks onto one voice in noise, sustained attention holds watch over time, and divided attention splits effort across two tasks, usually lowering both. The span of attention caps how many items we hold at once, around a handful.
Why it matters. Learners blame memory when attention is the real leak. Knowing its types helps them shield study time, take breaks and avoid risky multitasking.
Key words
- Selective attention
- : Locking onto one input while ignoring others.
- Sustained attention
- : Holding watch on one task over time.
- Divided attention
- : Splitting effort across two tasks at once.
- Span of attention
- : How many items focus can hold at once.
- Distraction
- : An input that pulls focus off the task.
Try it in two minutes
- Ask the learner to listen to one chosen sound in a noisy room.
- Ask how long they can watch one slow change, like a dripping tap.
- Ask them to hum while reading, and note what slips.
- Ask how they would arrange a desk to guard focus.
Try at home. Study ten minutes with the phone away, note slips, then repeat with music on and compare.
Organising What We See
Part of: Perception and the perceiver
Perception organises raw input into meaningful wholes. We split figures from grounds, group near and similar parts, and close gaps into shapes. Depth comes from cues like overlap and relative size, using one or both eyes. Constancies then hold objects steady: a bus stays large and a shirt stays white despite distance and dusk.
Why it matters. Learners trust every sight at face value. These rules show the mind's active organising work, which explains both skill and error in seeing.
Key words
- Figure-ground
- : Splitting the viewed shape from its background.
- Grouping
- : Joining near or similar parts into wholes.
- Closure
- : Seeing broken lines as full shapes.
- Depth cues
- : Hints telling how far things lie.
- Constancy
- : Holding an object steady despite view changes.
Try it in two minutes
- Ask the learner to read black words and name the figure and the ground.
- Join four dots into a square and ask what the mind added.
- Hold two pens at varied gaps and ask which looks nearer.
- Ask why a known door still looks like a door when half open.
Try at home. Find three depth cues in a street photo: overlap, size and height in view.
Perceiver Illusions and Culture
Part of: Perception and the perceiver
Perception is not a camera shot: needs, wishes, expectations and past learning steer what we notice and how we read it. A hungry child spots food stalls first, and a proofreader misses her own error. Illusions reveal these shortcuts when context fools judgement. Ways of living also tune skill: surroundings train what each group reads best.
Why it matters. Learners often fight over who saw rightly. Knowing perceiver factors builds humility about one's own view and respect for other readings.
Key words
- Perceptual set
- : Readiness to notice some inputs over others.
- Motivation
- : Needs and wishes steering what is noticed.
- Expectation
- : What one looks for shaping what is found.
- Illusion
- : A steady misreading caused by context.
- Cultural influence
- : Ways of living tuning perceptual skill.
Try it in two minutes
- Ask the learner what they notice first when hungry or worried.
- Show two equal lines with arrow fins and ask which looks longer.
- Ask why a proofreader misses her own error.
- Ask what a fisher reads in waves that a city child misses.
Try at home. Find one illusion online-free: equal coin rows spaced apart, and ask which row looks longer.
What your child will practise
- Attention and Its Types: Candy Quick Fire (Quick Fire)
- Organising What We See: Desert Puzzle (Clue Puzzle)
- Organising What We See: Desert Quick Fire (Quick Fire)
- Perceiver Illusions and Culture: Space Quick Fire (Quick Fire)
- Senses and Stimuli: Ocean Puzzle (Clue Puzzle)
- Quiz: Attention and Its Types (8 questions)
- Quiz: Organising What We See (8 questions)
- Quiz: Perceiver Illusions and Culture (8 questions)
- Quiz: Senses and Stimuli (8 questions)